Method for making dental instrument

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine, is applicable in dentistry and involves a method for preparing a dental instrument, the dental instrument configured to be used by a dentist, a set of pads to be used by the dentist (versions) and a method for the tooth preparation for treatment (versions). A method for making the dental instrument comprising the pad and configured to be used by the dentist; the instrument has at least one dental cutting instrument used for the tooth structure extraction, involves the stages: detecting the pad sized after the above tooth and after at least a portion of an adjacent tooth; modelling the pre-detected horizontal, vertical and inclined motions, which are supposed to be repeated by at least one dental cutting instrument to extract at least a portion of the detected portion of the tooth to be extracted; detecting the first and second guide edges inside the pad; making the above detected pad with the above first and second guide edges. The above first guide edge corresponds to the above pre-detected horizontal, vertical and inclined motions. The second guide edge inside the pad is remote from the first guide edge at a distance d. The second guide edge corresponds to the above pre-detected horizontal, vertical and inclined motions. The first and second guide edges are thereby presented to contact the dental cutting instrument to direct its horizontal, vertical and inclined motions in accordance with the pre-detected horizontal, vertical and inclined motions to remove at least the above portion of the pre-detected portion of the tooth to be extracted.

EFFECT: group of inventions enables providing the accurate tooth treatment for the following stage of treatment both by experienced and inexperienced dentists.

21 cl, 8 dwg

 

The present invention relates to a method for producing a dental tool, formed by the pads to be used by a dentist in removing tooth structure from the tooth, the said method comprises the stages:

defining a predetermined part of tooth structure to be removed to prepare the specified tooth for further treatment;

the definition of the pads corresponding to the specified tooth and the corresponding at least part of the adjacent tooth of the specified tooth;

modeling the movement, which is repeated dental cutting tool in order to remove at least a portion of a specified pre-defined parts;

defining a first guide edge within the specified lining, said first guide edge corresponds to a specified movement so that it is provided for contact with the specified dental cutting tool, repeating the specified movement thus provided to submit the specified dental cutting tool in a pre-determined position, said first guide edge is part of the guide means;

obtaining specified defined pads with these guide means.

Additionally we are Aasee the invention relates to a dental instrument, subject to use by the dentist in removing tooth structure of the patient's tooth, the tooth must be preparation for further processing, specified dental tool contains:

plate, has a shape and dimensions so that it can be removable to record over a specified tooth and could be attached to this tooth, or at least part of the adjacent tooth of the specified tooth;

the first guide edge within the specified lining, which is provided for contact with the dental cutting tool, repeating pre-defined movement, said first guide region is, therefore, provided to submit the specified dental cutting tool in a pre-defined position.

When the patient needs a crown, bridge, onlay, inlay, veneer, or other restoration or other dental prosthesis and/or aesthetic treatment of the teeth, usually during the first visit to the dentist office identifies the needs of the patient and determines the appropriate treatment. During subsequent visits, if the tooth contains damaged and/or infected tooth structure, the dentist removes the tooth structure and restores the tooth to the extent possible, using standard methods. Subsequently, the dentist performs FINA is inuu the tooth preparation for further processing by removing the substance of the tooth, which should be interpreted as the original tooth structure and restore the structure of the tooth using a dental cutting tool, such as high-speed drill. Relying on visual examination and expert evaluation, the dentist uses a drill to make the teeth of such form, which is suitable for further processing, in particular such form, on which you can install a crown, bridge, onlay, inlay, veneer, or other restoring the tooth part. Then, the dentist makes an imprint of the dental arch, which is prepared tooth, and sends the print in a dental laboratory by a dental technician made restoring part. Using the fingerprint of the prepared tooth, the dental technician receives the restoring part, which is suitable for color, the description of the geometry and material and sends the dentist. During the last visit of the patient, the dentist adjusts the regenerative part in accordance with need before you fit it in place. Additional dental instrument described in EP 1547544. This dental instrument reduces the influence of experience and expert judgement of the dentist for treatment, and the dentist uses it when drilling artificial cavity of the tooth root. In EP 1547544 provided directing means formed through cylindrical holes, for n the Board of the drill in the direction of straight forward. So even less experienced dentist can drill artificial cavity of the tooth root with greater accuracy. Moreover, a suitable cavity position of the root can be calculated on the basis of the information processed by the computer to generate the most optimal path of the cavity in the jaw bone.

A disadvantage of the known dental tool is that the dentist can use it when drilling holes in the jaw bone. This dental instrument is not suitable for use by the dentist as tooth preparation for further processing.

Additional dental instrument described in DE 4012327, which is considered the closest prior art. This dental instrument is formed by a template, which contains a guide edge for guiding a dental cutting tool according to pre-defined movement. The guide edge provided on a pre-determined height, in addition to provisions, it was also possible to control the depth of the dental cutting tool. In addition, DE 4012327 describes how the dentist can use the template by placing the template in a person's mouth and, using a movable platform, fixing the slope of the dental cutting tool in advance of reeseman angle of inclination, to hold a dental cutting tool along the guide edge, thus removing pre-defined tooth structure.

The disadvantage of this known dental tool is that the slope is fixed at a pre-determined angle of inclination due to the use of a mobile platform. Thus, the dental tool is not able to direct complex movement of the dental cutting tool, which also have a change of slope. In particular, such a complex movement is preferred when working with complex surfaces, such as teeth.

The present invention is to provide a method of obtaining a dental tool, which is suitable to direct the complex movement of the dental cutting tool.

To solve this problem, a method of obtaining a dental tool of the present invention is characterized by the fact that said method comprises the additional steps:

the definition of the second guide region within the specified lining, which is removed from the specified first guide edge at a distance d equal to at least 0.5 mm, the specified second guide edge corresponds to a specified movement so that it is provided for od is sovremennogo contact with a first guiding edge with the specified dental cutting tool, repeating the specified movement, said first and second guide region is, therefore, provided to submit the specified dental cutting tool at a pre-determined slope and the specified second guide edge is part of the above mentioned guide means. The presence of the second guide edges in the overlay causes the movement of the dental cutting tool in the same place can be directed along a pre-defined surface, whereas in the prior art, the movement of the tool can be directed only along pre-defined lines. Thus, it is also possible to achieve control the angle of the dental cutting tool, which is not possible in the prior art. The presence of the second guide edge leads to the fact that you can direct complex movement of the dental cutting tool, in which there are changes in regulations, and changes in slope.

The definition of pre-defined part of the tooth structure to be removed, has the effect that it no longer depends on the skills of the dentist. Determining and obtaining the guide edges in the overlay: these guide edges suitable for simultaneous contact with the dental cutting tool, ozbolat to direct the cutting tool according to precisely defined path at least partially pre-determined path. The plate containing the guide edge, accurately indicates the part of the tooth to be removed from the tooth, as determined by the computer. Moreover, given the tool according to the invention, to assist the dentist in removing tooth structure, since the tool allows the dentist to remove at least part of a pre-defined part of the tooth structure.

It should be noted that the term "match" should not be interpreted in a narrow sense, that molding should closely surround the teeth. Moreover, it should be interpreted so that the overlay should surround the teeth in order sufficiently to be in contact with the teeth and that after application it was not separated even when the application of a certain pressure due to normal use pads.

Preferably, the method according to the present invention further comprises the stage of:

obtaining three-dimensional data that are related to the shape of at least the specified tooth and at least a specified portion of the specified adjacent teeth;

the processing of these three-dimensional data using a computer in order to determine the significant dimensions and orientation for the specified overlay;

the processing of these three-dimensional data to determine the specified pre-defined parts.

Depending on indiv the dual dental situation of the patient, the computer is programmed to determine the best way to make tooth form, which is suitable for further processing.

In a preferred embodiment of the invention the said first and the said second guide edge designed for simultaneous contact with the specified dental cutting tool at the contact points are deleted in the longitudinal direction from each other by a specified distance, these guide edges, thus, define a guide surface along which should be sent to specified dental cutting tool.

Through simultaneous contact of two guiding edges with a cutting tool at the contact points that are longitudinally separated from each other, the cutting tool can be directed at least partially on a pre-defined path. Preferably the cutting tool moving along the two guiding edges and thereby define a guide surface. This surface contains two guide edges, and along this surface can be directed cutting tool. This allows you to precisely direct in two dimensions.

Preferably, these directing means include a guide slit that defines the path, walking on the surface of the specified lining and suitable to send the specified dental cutting and is strument along the specified path so which makes it possible to direct the removal of at least part of the specified pre-defined part of the tooth structure.

The two alignment edges that must be removed from each other, one can be placed on one side and the other on the other side of the path, thus defining a path between two guide edges. To this end, the distance between the two guide edges should be essentially equal to the diameter of the cutting tool. The use of dental cutting tool through simultaneous contact with the two guide edges and repeat the ways you can direct the cutting tool in at least two dimensions. Taking into account the longitudinal cutting tool surface defined by the two guide edges in this configuration will be essentially perpendicular to the direction of the cutting tool during operation. The preferred inclination of the cutting tool in this configuration forms a right angle with the plane formed by the two guide edges.

Two guide edges that must be removed from each other, also can be placed on one side of the road. Then at least the third guide region will determine the other side of the road. Taking into account the longitudinal cutting tool in this configuration is again, define two guide edges will be essentially parallel to the direction of the cutting tool during operation. The third guide edge in this configuration will further guide the cutting tool, thereby increasing the accuracy of the process of removal of tooth structure. The use of the dental instrument through simultaneous contact with the two guide edges and repeating path in this configuration allows you to direct the cutting tool in two dimensions and to direct the angle of the cutting tool.

Preferably, the method includes additional steps:

obtaining a restorative tooth portion, which has an internal shape which is defined in order to fit the pre-defined rest of the tooth structure specified tooth, and has an outer shape which is defined to match the rest of the adjacent teeth.

The advantage of the method according to the invention is that the shape of the rest of the tooth structure of the prepared tooth is known in advance due to direct removal of tooth structure. This will improve further processing, such as obtaining temporary or final inlays, onlays, bridges, crowns or veneers in advance based on the three-dimensional data. This leads to the reduction required is about the number of visits of the Cabinet, because the dentist can prepare the tooth, and to establish restoring the tooth portion in the prepared tooth for a single visit. This approach not only saves time and money, but also greatly reduces discomfort for the patient. In addition to minimum chance of contamination of the tooth and the resulting complications.

Preferably, the method includes additional steps:

the processing of these three-dimensional data modeling restoring a tooth portion that has an internal shape which is defined in order to fit the pre-defined rest of the tooth structure specified tooth, and has an outer shape which is defined to match the rest of the adjacent teeth;

the receipt of the indicated restoring the tooth part.

Thus, individually designed restoring the tooth part can be delivered together with the dental tool according to the invention. This is possible because when you use the dental tool, the final shape of the prepared tooth is known in advance. The result is that you need less visits to the dentist to place the restoring part.

Preferably, the specified pre-defined portion define:

first, by means of which determine the outer shape of the specified restoring the tooth part, to match the rest of the adjacent teeth, and determine the internal form specified restoring the tooth part, which is compatible with the specified outer form;

secondly, by determining the shape of the remaining tooth structure to the specified healing tooth part having a specified internal form, consistent with the above form of the rest of the tooth structure;

third, by identifying the specified pre-defined part as part of tooth structure to be removed to leave a specified form of the remaining tooth structure.

Starting with a definition of restorative tooth parts instead of the usual tooth preparation, benefit. You can define restoring a tooth portion which has an outer shape to optimally match the rest of the adjacent teeth. Procedures for determining the outer shape known to specialists in this field. Then define the internal form, the internal form is compatible with the specified outer form. Criteria of compatibility depends on the material used and are mainly related to the strength parameters, production parameters and settings related to the installation of repair parts for the tooth and/or teeth. Preferably the internal form is determined in such a way that a mini is material quantity of material to obtain a restorative tooth part. In turn, this leads to the remaining tooth structure, which must comply with this internal form, great as possible, namely, the more material the restored tooth is material to restore the tooth, the less material the restored tooth is the tooth structure. Then a pre-defined part can be defined as the part of the tooth structure to be removed to leave a specified form of the remaining tooth structure. Thus, a preliminary determination of restoring the tooth part leads to the fact that the minimum amount of tooth structure to be removed from the tooth and to preserve as much original tooth structure. This is an advantage because it is better to keep more of the original tooth structure.

Providing a defined restoring the tooth part which has certain external and internal form, together with a dental tool leads to need fewer visits to the office, because the dentist can prepare the tooth and set restoring a tooth portion on the prepared tooth in a single visit.

Preferably specified dental instrument includes at least one additional plate, the plate and the specified at least one stage is nitella plate defined to to guide a dental tool for removing tooth structure in several stages, in which these guides funds in the specified overlay provide in order to send the specified cutting tool in one of these several stages, and at least one additional guiding means in the specified at least one additional overlay provide in order to send the specified cutting tool in at least one more of these several stages, the method further comprises the stage of:

determining at least one additional overlay that corresponds to the specified tooth and the corresponding at least part of the adjacent teeth;

modeling at least one additional movement, which should repeat the specified dental cutting tool in order to remove at least one additional portion of the specified pre-defined parts;

determining at least one additional first guide edge within the specified at least one additional lining, indicated at least one additional first guide edge that matches at least one additional movement so that his PR shall deliver to the contact with the specified dental cutting tool, repeating the specified at least one additional movement, thus, provide in order to send the specified dental cutting tool in a pre-defined position, indicated at least one additional first guide edge is part of the specified at least one additional guide means;

determining at least one additional second guide edges in the specified at least one additional overlay that has been removed from the specified at least one additional first guide edge at a distance d equal to at least 0.5 mm, specified at least one additional second guide edge that matches at least one additional movement so that it provides for simultaneous together with the specified at least one additional first guiding edge of the contact with the specified dental cutting tool, repeating the specified at least one additional movement, the specified at least one additional first and second guide region is, therefore, provide in order to send the specified dental cutting tool under pre-determined slope is m, the specified at least one additional second guide edge is part of the specified at least one additional guide means;

the receipt of the indicated at least one additional overlay with the specified at least one additional guiding means.

Receive multiple overlays instead of only one lining provides additional flexibility method of producing a dental tool. Different pads can provide in order to send the dental cutting tool along different sides of the tooth to be trained, for example in order to determine the peripheral path through the use of multiple plates, each defines a different segment of the peripheral path. In addition, several plates allow the use of various dental cutting tools, which is necessary in some cases. You can provide different overlays for tooth preparation in several stages, among which, for example, the first stage provides for smoothing the top of the tooth, the second and third stage provide in order to cut longitudinal and transversal sides of the tooth, and the fourth and fifth stages provide for rounding the edges between the longitudinal and transverse sides, each distinguished by the Asia side of the tooth. Tooth preparation stages enables the design of each plate so that they contained the guiding edge, which, in particular, determine in order to guide the cutting tool in a specific way, which is a specific stage.

Hereinafter the invention is described in more detail in relation to the drawings, which illustrate some preferred embodiments of the invention. In the drawings:

in Fig.1 presents a top view of the lining with the guide slit according to the invention;

in Fig.2 presents a side view of the lining with the guide slit, which is placed on the patient's teeth;

in Fig.3 presents a cross section of part of the lining with the guide means according to one variant embodiment of the invention and the cutting tool;

in Fig.4 shows a cross-section of part of the lining with the guide means according to another variant embodiment of the invention and the cutting tool;

in Fig.5 shows a cross-section of part of the lining with the guide means according to the invention and the cutting tool;

in Fig.6 presents a cross section of part of the lining with the guide means according to an additional variant embodiment of the invention and the cutting tool;

in Fig.7 presents a set of overlays to be used by the dentist in preparing zu is for a crown or bridge;

in Fig.8 presents a cross section of the lining shown in Fig.7a.

In the drawings, the same item numbers are located on the same or similar elements.

The terms "below", "above", etc., and derivative terms of directions, such as "horizontal" and "vertical", based on the normal configuration of the pads, as shown on the drawings, where the strap meets the teeth, the roots of which go vertically down. The term "dentist" in this text should not be interpreted in a limiting way, and it can also be read as a dental technician, assistant, dentist, dental auxiliary staff, dental therapist, dental designer and so on

The invention provides a method of obtaining a dental tool, formed by plates 1, to be used by a dentist in removing tooth structure. In addition, the invention provides a cover plate 1, obtained by this method. In Fig.1 and 2 shows such a plate 1 mounted on the teeth 2 of the patient. Preferably, the invention provides a method of obtaining a dental tool and restores the tooth parts so that healing tooth portion will correspond to the tooth, which is prepared using a dental tool.

Dentists who definition tool according to the invention preferably uses a dentist in preparing a tooth for restoration, such as placement of inlays and onlays, crowns, bridges and veneers. For this recovery need healing part, you get to match the tooth after preparation of the latter. The use of a dental tool according to the invention leads to the fact that the shape of the prepared tooth, which is usually known only after the preparation, determined in advance. Based on this information, you can get hi part to this healing part was available to the dentist even before he or she begins to prepare the tooth, and it can be set up directly after preparation of the tooth. This leads to the fact that the patient suffers from a smaller inconvenience, in particular to the fact that fewer visits to the dentist. In addition to a minimum reduces the chance of contamination of the prepared tooth and the resulting complications.

Preferably, the tooth preparation for further processing performed essentially healthy tooth. When a tooth is damaged or infected, damaged and/or infected part of the tooth will first be subject to removal and the tooth will need to recover before tooth preparation for further processing. This minimizes the chance that an infection will develop under the restoring the tooth part. It also maximizes croxley restoring the tooth part, as the basis for restoring the tooth part, namely the tooth, no longer contains the damaged part.

You can use the pad, made for one tooth, when the tooth preparation of the patient, where such other tooth of the patient has essentially the same size and shape. Therefore, the scope of the present invention includes obtaining multiple overlays that can be standardized, re-use and/or re-obtain. Also in the scope of the present invention includes the use of data obtained when receiving a previous overlays and regenerating parts in the design and creation of new plates having essentially the same dimensions and forms.

There are several ways of obtaining three-dimensional data on the dental system of the patient. Such data can be extracted, for example, by processing images of a dentition of the patient. Another way is to manufacture a physical imprint of the dentition and then the next scan of the print or inverted casting imprint. This scanning can be performed using CAD/CAM device of three-dimensional scanning. An illustration of such a device is FreeForm® company SensAble Technologies Inc. from Woburn, Massachusetts, USA. Although this scanning device can scan the to the model of the dental arch with a tolerance of approximately 10 μm, it does not take into account other factors that lead to errors, which is obtained by the manufacturing footprint and the casting of dental imprint. Upon receipt of final healing or part denture should take into account these other factors, leading to errors or tolerances.

CAD program selects a specific configuration for the pads, sometimes called the reducing spoon, and ultimately configuration to a prepared tooth through the use of specific protocols, which are based on previous experience for the preparation of dentures.

In one embodiment of the invention a digital file of a tooth of the subject can be compared with an existing database for such prostheses. This illustrative database is available at Heraeus Kulzer Tooth Library company Heraeus Kulzer GmbH of Hanau, Germany. This database is also integrated into the SensAble Dental Lab System (SDLS). The prosthesis (e.g., a crown or onlay), comparable with the prosthesis, suitable for a tooth of the subject, selected from the database Kulzer. This information about the prosthesis contains the configuration and dimensions of the prepared tooth, which will correspond to the inner surface of the prosthesis. This internal configuration in the database Kulzer prepared for this crown is used for the design of overlays (reducing spoons) for use in the preparation of the tooth patsie the TA. When designing overlays use the fundamental principles and purposes known in the art, for example, regarding the removal of a minimum number of the original tooth surface.

For example, in a set of pads or a reduction spoons may be one plate or spoon for the reduction of the medial and distal surfaces (front and back) and another spoon for closing (top) surface. Also there may be two finish of the spoon, which cut the lingual (tongue) surface and buccal (cheek) surface of the tooth. To prepare for a crown will need more spoons for gingival edges.

The above describes a typical method, but for the preparation of a tooth for subsequent installation of a denture or repair parts can be approached more or less reducing the number of spoons or plates. After obtaining three-dimensional data about the tooth these data are processed by computer to determine the pad 1, corresponding to the teeth 2 of the patient. To this end, the internal form of pads preferably corresponds to the outer shape of the tooth to be trained, and the outer shape of at least part of the adjacent teeth. The plate must correspond to the teeth so that when the pad is placed on the teeth, he will separate only p the means of application is powerful enough effort to the plate. During the preparation of the tooth to the plate, you can put a little effort, which preferably should not change the position of the pads on the teeth. Preferably, the plate 1 is over the teeth 2 in order to cover part of the gums 3 or the adjacent teeth to stability and to protect. Because the dentist will use the pad 1 to remove the substance of the tooth, it will be useful to stably place the pad 1 on the tooth. As an example, the pad 1 that exactly matches the tooth, the two adjacent teeth and gums 3, ensures that the dentist may place and maintain the pad in a stable position during removal of tooth structure. When the cover 1 covers part of the gums 3, at least this part of the gums 3 will be protected during the process of removal of tooth structure.

It should be noted that the plate 1 according to the invention can cover a few teeth at a time and it can be provided for use by the dentist in the preparation of several teeth using a single overlay 1. This can be useful when preparing teeth for veneers. As explained next, this plate includes directing means for each tooth, which you need to prepare.

Defined plate 1 has a thickness of 4, which mainly depends on its required strength and, thus, also the tons of material, from which it will be executed. Plate 1 according to the invention may have a constant overall thickness of 4. Essentially constant total thickness is preferred for the pads to be used by the dentist in the preparation of the tooth or teeth for the veneers. Overlay be used for tooth preparation for installation of a bridge or crowns, preferably contains the upper guide part 5 and the lower bearing part 6. Supporting part 6 plates 1 will ensure that the pad 1 can be set stable on teeth 2, while the guide part 5 overlays 1 will guide the dental cutting tool and preferably will also determine the maximum depth of penetration of the cutting tool in the tooth. For this purpose, the thickness of the guide part 5 overlays 1 preferably will be determined in each case together with the definition of the guide means 7, as will be explained hereinafter. The thickness 4 of the bearing part 6 plates 1, you can choose more freely depending on the preference of the dentist and/or the computer program.

After obtaining three-dimensional data, the data is also processed through a computer to determine a pre-defined part of the tooth structure to be removed from the tooth by the dentist. Pre-defined part will determine the best considering further processing. If in order to make possible further processing, specific shape of the prepared tooth, the pre-defined part will be to choose so that after tooth preparation to leave this particular form of.

The definition of pre-defined parts depends on many factors and will vary from case to case. Parameters are the location of the tooth in the mouth of the patient, the number and location of the damaged tooth structure, the distance from the tooth to the adjacent teeth, etc., In the preferred embodiment, the computer will also take into account the different parts of the tooth, such as enamel, dentin, pulp, cement, etc. when determining pre-defined parts. Also in the framework of the basic aspects of the invention it is clear that the patient's tooth can be built using standard methods and materials prior to the actual stage of preparation of the tooth with the use of overlays.

According to the invention a computer program for determining a pre-defined part of the tooth structure to be removed without the assistance of a dentist, except with regard to input data about the tooth. However, according to the invention, the computer can also be programmed to determine a pre-defined portion in cooperation with the dentist, where, for example, the dentist selects some of the parameters. This cooperation can be arranged through the visualization of data related to the tooth, on the computer display and provide the dentist the opportunity at least to enter one parameter relating to the preparation of the tooth. Preferably preview of the tooth visualize on a computer display along with the preview simulation of the prepared tooth in order to allow the dentist to see the influence of selected parameters on the prepared tooth. The latter characteristic provides an increased degree of freedom of the dentist and allows less experienced dentist to consult a more experienced dentist about the case, based on the data in the computer. Thus, the method of obtaining a dental tool according to the invention allows less experienced dentist to decide on further processing and to prepare the tooth for further treatment with the same quality as if he or she were an experienced dentist.

In another embodiment, a computer program for determining a pre-defined part of the tooth structure to be removed in several phases. At the end of each phase, the computer offers the dentist the simulated solution and asks for approval or correction of the proposed resolution.

Preferably the pre-defined portion will be determined is set in several stages. The first stage determines the outer shape of restoring the tooth to restore the tooth part match the rest of the teeth, and it is inserted into the dental arch of the patient. The lifting of the bite or other correctional improvements can be embedded directly in the construction of the outer form. Then, based on those defined by the outer form, becomes defined internal form, which is compatible with the outer form. Thus, it is possible to determine restoring the tooth portion, which has an optimal outer shape and optimal design in the sense that it is quite durable and requires a minimum amount of material. At the next stage, define the shape of the remaining tooth structure so that the internal form of restoring the tooth part consistent with the rest of the tooth structure after removal of tooth structure. At the final stage determines the pre-defined portion of the tooth structure as part of tooth structure to be removed to leave the form of the remaining tooth structure. This progress makes it possible to define the outer shape restoring the tooth part to use programs best match. Usually the dentist does not repeat the steps in the above sequence. The dentist will operate in reverse order, because the dentist need is to know the shape of the prepared tooth, to determine the internal form of the healing part, after which the dentist determines suitable outer shape. First, the definition of restorative tooth part according to a preferred variant of the invention, the leads to be removed a minimum of tooth structure from the tooth and you can achieve maximum preservation of the original tooth structure.

After defining the pre-defined part, you can determine directing means. The purpose of the guide means is to guide the dental cutting tool, i.e., the drill along the simulated motion, thereby cutting tool removes at least part of a pre-defined part. To this end, in some cases, it should be understood that the dimensions of the dental cutting tool, such as length, diameter, cross-sectional shape, etc. will be important for the movement, you want the cutting tool to remove a certain part of the tooth structure. You should also understand that in many cases will not be sufficient to perform only one movement to remove all pre-defined parts. By means of computer calculations and/or modeling can simulate one or more movements for removal has preliminarily the defined part of the tooth structure. It should be understood that the movement in this context not only refers to the two-dimensional position, but refers to the movement of the cutting tool in all its aspects, such as horizontal movement, vertical movement and tilting movement.

Directing means according to the invention contain at least two guide edges 11, 12 (Fig.3-6). Two of these guide edges 11, 12 are separated from each other by a distance d equal to at least 0.5 mm guide edges 11, 12 provide for simultaneous contact with the cutting tool 10, which thus at least partially direct the pre-defined movement of the cutting tool 10. In this context, it should be understood that the surface, which has a length and has a thickness which is at least 0.5 mm, can be considered as the specified at least two guiding edges 11, 12. Namely, two outer edge surfaces provide for simultaneous contact with the cutting tool 10, and they are separated from each other by a distance d equal to at least 0.5 mm

The guide edges 11, 12 is determined in accordance with the simulated movement of the dental cutting tool, so that both guide edges 11 and 12 are simultaneously in contact with the cutting tool, repeating the movement. Suppose the equipment, the guide edge at the same time and are constantly in contact with the cutting tool, preferably during the entire movement. The contact between the guide edge and the cutting tool along the movement preferably represents a point of contact.

Preferably two guide edges 11, 12 are separated from each other by a distance d equal to at least 1 mm, more preferably equal to at least 2 mm and most preferably equal to at least 3 mm, the distance d between the two edges 11, 12 will improve the quality of the direction, because the dentist will be much easier to control the cutting tool 10 near the enlarged guide means.

The guide edges 11, 12 provide so that the cutting tool simultaneously in contact with them at two contact points. As shown in Fig.3, preferably, these contact points 11, 12, considered on the cutting tool 10, removed from each other in the longitudinal direction by the distance d. When the cutting tool 10 has essentially perpendicular to the guide edges, the distance between the contact points will be essentially equal to the distance d between the guide edges. In Fig.3 shows the cutting tool 10 located at the same time two opposite guide edges 11, 12. Guides CRA, 12 in this configuration, determine the surface along which it is possible to direct the cutting tool 10.

However, the guide edges 11, 12 can also communicate with a cutting tool 10 in two contact points, each of which is located on one side of the cutting tool 10, as shown in Fig.4. In this configuration, the guide edges 11, 12 define a guide slit, through which you can guide the cutting tool 10. The guide slit 7 is preferably determined in order to determine the path that lies in the upper surface of the lining 1. The slit 7 provide in order to send the dental cutting tool along this path, and to this end, the slit 7 passes through the plate in order to form a connection between the inner side of the lining and the external environment. When to remove a pre-defined part you want to repeat more than one, you need to define some guiding slits 7.

The combination of these two above-mentioned configuration shown in Fig.5. In this figure, the first and second guide edges 11, 12, representing the two guide edges which are separated from each other, you can see on the left side, these edges define a guide surface. The third guide region 13 can be seen on the right side, this region is determined by the t path together with the first and second guide edges 11, 12. Therefore this configuration allows you to send as horizontal movement and inclination of the cutting tool.

As can be seen in Fig.5, the cutting tool 10 preferably includes an annular ledge 14, mounted on the cutting tool 10. Preferably at least one of the guide edges 11, 12, 13 provide in order to send the annular ledge 14 of the cutting tool 10, thereby guiding the cutting tool 10 at a pre-determined vertical position or height or depth. As can be seen in Fig.5, the guide slit 7, which defines a horizontal path, moreover, defines a pre-determined height 8 for each horizontal location of the cutting tool in order to guide the cutting tool 10 along a horizontal path and at a pre-determined inclination as well as to guide the cutting tool in the vertical direction.

In Fig.6 shows a modified variant of the implementation shown in Fig.3, and shows the guide edges 11, 12, which provide for simultaneous contact with the cutting tool in two contact points that are longitudinally separated from each other. In this embodiment, it is possible to remove tooth structure, which is located between the guides of the KRA is mi 11, 12. In particular, this implementation will use during tooth preparation for veneers.

For a crown or bridge, the tooth should take the form of a truncated pyramid with rounded edges. To this end the outer and upper part of the tooth to be removed. This removal of tooth structure can be directed through the dental instrument according to the invention.

Preferably the removal of tooth structure to prepare the tooth for a crown or bridge is carried out in several stages, as shown in Fig.7. In the first stage, shown in Fig.7a and Fig.8, the upper part of the tooth is smooth. This can be done using plates containing the guide edges 11, 12, as shown in Fig.6. In practice, however, it is preferable that the plate took the form of a V. this purpose the upper part is preferably smoothed by using two guide means, as shown in Fig.3, these guide means are located on both sides of the tooth so that these guides provide funds to send the specified cutting tool to cut the specified upper part in the form of a V.

On the second and third steps shown in Fig.7b and 7C, the longitudinal and transversal sides of the tooth cut in order to obtain the shape of a truncated pyramid. Cutting these store the n can be directed by means of plates, contains guides tools, as shown in Fig.3, 4, or preferably in Fig.5. Preferably one plate contains two such guide means, each determines the path that leads to the surface of the lining, the paths are parallel to each other, each on one side of the tooth.

The fourth and fifth stages, shown in Fig.7d and 7E, round the edges of the pyramid. Rounding these edges can be directed through the pads as shown in Fig.1 and 2. This overlay contains the path, reaching the surface of the lining and defining an arc of a circle. Each side of the path defines a guide surface which contains at least two guide edges, as shown in Fig.3. The height of the guide part 5 overlays 1 determine in order to guide the cutting tool 10 in a pre-determined vertical position.

In this sequence of stages, the first stage can be performed as the last step, not the first. However tests have shown that in the process of preparation of the tooth is advantageous to start with a smooth upper part of the tooth.

After determining the pads 1 and the guide means can be obtained to determine the plate 1 containing the designated guides tools. This can be accomplished by any known means, such as CAD/CAM system, rapid prototyping or require the dimensional printing. When defined more guide tools, you can get a few plates 1, each contains one or more guide means. Preferably the device rapid prototyping creates an overlay with a tolerance of approximately 30 microns.

As already indicated above, the plate 1 has a lower carrier portion 6 and the upper guide part 5. As you can see in the figure, the guide portion 5 has a certain thickness 8, which determines the height 8 of the way and allows you to direct the cutting tool in the vertical direction. Preferably the bearing part 6 and/or the guide part 5 contains a vertical hole 9 on the side of the guide slit 7 provided in order to perform the function of the entrance of the guide slit 7 for the dental cutting tool. In particular, this hole is useful when the cutting tool has an end portion, the diameter of which is larger than the diameter of the main part of the cutting tool, such as a high-speed drill with a tip in the form of a ball. The introduction of such a cutting tool into the guide slit 7 through the upper part of the lining is at least partially expand the guide slit 7, thus at least partially eliminating the possibility firmly guide the cutting tool along a pre-defined path. Moreover, side entrance 9 prefer is INEE entrance through the upper part, because it will be easier to enter the cutting tool in a controlled manner into the guide slit 7.

When the guide slit 7 is determined for the formation of a circular path in a horizontal plane, it would be preferable to divide this path into several segments and get a few plates 1, each includes a guide slit 7, corresponding to one segment of this path. The result is a set of plates 1, which the dentist can use one after the other for removal of tooth structure, repeating this circular path. Each plate 1 from a set of plates 1 to guide the cutting tool along the specific sides of the tooth.

In the embodiment, where the pre-defined part is not determined on the basis of the shape restoring the tooth part, the latter can be defined based on the data in the computer. The outer shape of restoring the tooth part can be defined in several ways, which are well-known professional in this field. The lifting of the bite or other correctional improvements can be embedded directly in the construction of the outer form. The first possibility is the formation of restoring the tooth so that it was similar to the outer shape of the original tooth. A second possibility is the formation of restoring the tooth so that it is soo who welcomed the adjacent teeth. The third possibility consists in the combination of the first and second and changes the shape of the original tooth to best match the adjacent teeth. The inner shape of restoring the tooth portion will be determined on the basis of the simulation of tooth preparation. Because the tooth will be prepared and forwarded by the way, we know in advance, what form will be prepared tooth. The internal form of restoring the tooth portion is selected so that it corresponds to the shape of the prepared tooth.

Preferably the method according to the invention further comprises a step for restoring the tooth part.

Similarly, the definition of pre-defined parts, restoring the tooth part can be determined by computer without any interaction with the dentist. However, it is preferable that the computer has determined restoring the tooth portion in cooperation with the dentist, for example, in the manner described above. In this process of identifying restoring the tooth part of the computer scans the pre-defined clinical parameters and alert the dentist in case of discrepancy of restoring the tooth part of the standard norms. This will allow the dentist to construct restoring the tooth part of a fast and reliable way.

Obtaining a restorative tooth part can the be done by any means, well-known specialist, such as CAD/CAM systems.

1. A method of obtaining a dental instrument containing the pad configured for use by a dentist with at least one dental cutting tool when removing tooth structure from the tooth, where the method includes the stage:
definitions pads corresponding to the specified tooth and the corresponding at least part of the adjacent tooth of the specified tooth;
modeling pre-defined horizontal, vertical and inclined movement, which should be repeated at least one dental cutting tool in order to remove at least a portion of a specified pre-defined part of the tooth structure to be removed;
the definition of the first guide edge within the specified pads, and said first guide edge meets a pre-defined horizontal, vertical and inclined movement;
determining a second guide edge within the specified lining, which is removed from the specified first guide edge at a distance d, with the specified second guide edge meets a pre-defined horizontal, vertical and inclined movement, these first and second direction is shining edge, thus, provided for the contact with the specified dental cutting tool to guide the horizontal, vertical and inclined movement of the specified dental cutting tool so that said dental cutting tool follows the pre-defined horizontal, vertical and inclined movement to remove at least a specified portion of the specified pre-defined part of the tooth structure to be removed; and
obtaining this defined pads with the specified first and second guide edges.

2. The method according to p. 1, where the method further comprises:
processing the acquired three-dimensional data that are related to the shape of at least the specified tooth and at least a specified portion of the adjacent tooth, using a suitable computer program in order to convert these acquired three-dimensional data in the processed three-dimensional data defining the specified overlay to match the specified tooth and a specified portion of the specified adjacent teeth and the specified first and second guide edges with the specified overlay.

3. The method according to p. 1, which differs in that the said first and the said second guide edges define for simultaneous contact with the decree of the major dental cutting tool at the contact points, which in the longitudinal direction are separated from each other by a specified distance d, these guide edges, thus, define a guide surface contact points, along which should be directed horizontal, vertical and inclined movement of the specified dental cutting tool.

4. The method according to p. 2, which differs in that the said first and the said second guide edges define for simultaneous contact with the specified dental cutting tool at the contact points that are longitudinally separated from each other by a specified distance d, these guide edges, thus, define a guide surface contact points, along which should be directed horizontal, vertical and inclined movement of the specified dental cutting tool.

5. The method according to any of paragraphs.1, 3, or 4, characterized in that the said first and second guide edges define a path along the upper surface of the specified lining and suitable to send the specified dental cutting tool along a specified path in a way that makes it possible to aim for at least partial removal of the specified pre-defined part of the tooth structure.

6. SPO is about under item 2, which is characterized in that the said first and second guide edges define a path along the surface of the specified lining and suitable to send the specified dental cutting tool along a specified path in a way that makes it possible to aim for at least partial removal of the specified pre-defined part of the tooth structure.

7. The method according to p. 1 or 2, characterized in that the method comprises an additional stage:
obtain a restorative tooth portion, which has an internal form, which is determined in order to fit the pre-defined rest of the tooth structure specified tooth, and has an outer shape that is determined to match the rest of the adjacent teeth.

8. The method according to p. 5, which differs in that the method comprises an additional stage:
obtain a restorative tooth portion, which has an internal form, which is determined in order to fit the pre-defined rest of the tooth structure specified tooth, and has an outer shape that is determined to match the rest of the adjacent teeth.

9. The method according to PP.2, 4 or 6, characterized in that the method comprises an additional stage:
processing of these acquired three-dimensional data for mod is the stimulation of the healing of the tooth part, which has an internal form, which is determined in order to fit the pre-defined rest of the tooth structure specified tooth, and has an outer shape that is determined to match the rest of the adjacent teeth;
obtaining this restores the tooth part.

10. The method according to p. 9, which differs in that the specified pre-defined part and found restoring the tooth portion define:
first, by defining the outer shape of the specified restoring the tooth part to match the rest of the adjacent teeth, and determine the internal form specified restoring the tooth part, which is compatible with the specified outer form;
secondly, by determining the shape of the remaining tooth structure so that this healing tooth part having a specified internal form, consistent with the above form of the rest of the tooth structure; and
third, by identifying the specified pre-defined part as part of tooth structure to be removed to leave a specified form of the remaining tooth structure.

11. The method according to p. 1 or 2, characterized in that said dental cutting tool includes a cutting portion and an annular ledge, one of the first and second n is sending edges designed to communicate with the specified annular ledge along to allow you to send specified dental cutting tool at a pre-determined depth.

12. The method according to p. 1 or 2, characterized in that the dental instrument contains the specified plate and at least one additional pad for use by the dentist in the direction of the dental cutting tool when removing tooth structure from the specified tooth in several stages, and each of the plates refers to the stage of removal of tooth structure from the specified tooth indicated at least one additional cover provided to submit the specified cutting tool in at least one more of these several stages, the method further comprises:
determining at least one additional overlay that corresponds to the specified tooth and the corresponding at least a specified portion of the specified adjacent teeth;
modeling at least one additional pre-defined motion, subject to specified repetition dental cutting tool to remove a portion of a specified pre-defined part of the tooth structure, not the remote any other lining;
definition wide-angle the at least one additional first guide edge within the specified at least one additional pads, the specified at least one additional first guide edge that matches at least one additional pre-defined movement;
determining at least one additional second guide edges within the specified at least one additional upper layer, which is removed from the specified at least one additional first guide region on the distance d, indicated at least one additional second guide edge that matches at least one additional movement specified at least one additional first and additional second guide edge, thus provided for the contact with the specified dental cutting tool, in order to guide the movement of the specified dental cutting tool so the specified dental cutting tool should be further specified pre-defined movement to remove at least part of the specified pre-defined part of the tooth structure to be removed; and receiving the said at least one additional overlay with the specified at least one additional first and second guide edges.

13. The method pop.12, which is characterized in that the said plate and the said at least one additional cover form a set of overlays to be used by a dentist in removing tooth structure from a tooth for later installation of a crown or bridge or pads on the specified tooth, with a specified set of pads contains five plates, including:
the first plate define in order to send the specified dental cutting tool for smoothing the upper part of the tooth based on the desired height of the remaining tooth structure;
the second plate define in order to send the specified dental cutting tool for cutting off one of the longitudinal or transverse side of the specified tooth;
the third plate determines to send the specified dental cutting tool to trim the other of the longitudinal or transverse side of the specified tooth;
the fourth pad determines to send the specified dental cutting tool for rounding the edges between the longitudinal and transversal sides of the tooth on one side of this tooth;
the fifth pad determines to send the specified dental cutting tool for rounding the edges between the longitudinal and transverse sides h is BA on the other side of this tooth.

14. The method according to p. 1 or 2, which is characterized by the fact that these pads get rapid prototyping.

15. The method according to p. 1 or 2, characterized in that the distance d is at least 0.5 mm

16. Dental instrument (1), designed for use by a dentist with at least one dental cutting tool when removing tooth structure of the patient's tooth, the tooth must be preparation for further processing, specified dental tool (1) includes:
the pad that has the shape and dimensions so that it can be removable locking on a specific tooth and at least part of the adjacent tooth of the specified tooth, characterized in that the plate contains:
the first guide edge for contact with the dental cutting tool to guide the horizontal, vertical and inclined movement of the dental cutting tool repeats the pre-defined horizontal, vertical and inclined movement in order to remove at least part of a pre-defined part of the tooth structure to be removed, said first guide edge belongs to the specified pre-defined horizontal, vertical and inclined movement; and
the second guide edge removal is from the specified first guide region on the distance d, the specified second guide edge provided simultaneously with a first guiding edge of the contact with the specified dental cutting tool to guide the horizontal, vertical and inclined movement so that the dental cutting tool repeats the above pre-defined horizontal, vertical and inclined movement.

17. The sets of earpads (1) to be used by a dentist in removing tooth structure of the patient's tooth, where the tooth is subject to preparation for further processing, with a specified set of plates (1) get the method under item 12.

18. The sets of earpads (1) to be used by a dentist in removing tooth structure of the patient's tooth, where the tooth is subject to preparation for further processing, with a specified set of plates (1) are obtained by the method according to p. 13.

19. The method of preparing a tooth for processing, which includes stages:
the dental instrument according to p. 16, configured for use by the dentist using dental cutting tool when removing a pre-defined part of the tooth structure of the tooth; and
removing at least part of the pre-defined parts of the structure of the tooth by a dental cutting tool along the seat reservation-defined path of motion, where the specified pre-defined path of motion is defined by a dental instrument according to p. 16.

20. The method of preparing a tooth for processing, which includes stages:
providing a set of pads on p. 17, configured for use by the dentist when you delete a pre-defined part of the tooth structure of the tooth; and
removing at least part of the pre-defined parts of the structure of the tooth by a dental cutting tool along pre-defined paths of motion, where the specified pre-defined path of motion is defined by a dental tool, where the dental tool is a set of upper layers under item 17.

21. The method of preparing a tooth for processing, which includes stages:
providing a set of pads on p. 18, configured for use by the dentist when you delete a pre-defined part of the tooth structure of the tooth; and
removing at least part of the pre-defined parts of the structure of the tooth by a dental cutting tool along pre-defined paths of motion, where the specified pre-defined path of motion is defined by a dental tool, where the dental is a logical tool is a set of pads on p. 18.



 

Same patents:

FIELD: medicine.

SUBSTANCE: invention refers to medicine and is applicable in treating lower molars with destruction in root bifurcation. Laboratory and radiographic examinations of an involved tooth are performed. A crown-radicular separation is followed by introducing an osteotropic material. Residual dental stumps are prepared for whole-piece crowns. A working impression of the lower jaw and an auxiliary impression of the upper jaw are made. The whole-piece crown with a washing space surrounding the separated bifurcation is made. It is fixed on dental cement.

EFFECT: method ensures the integrated treatment involving surgical and orthopaedic interventions and enables preserving the dental functions and restoring its anatomical shape.

1 ex

FIELD: medicine.

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3 cl, 12 dwg, 3 ex

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine, namely to dental orthopaedics, and aims at developing a physical or virtual dental model as a supplement for making a dental implant. The method involves imaging upper and lower jaws, a motion field of the temporomandibular joint in disclusion, a contact region of the teeth in occlusion and in an extensive field of motion. A path of travel between the lower and upper jaws is calculated. Making the dental implant is ensured by using a fastening device taking into account the patient's diagnostic information, comprising the fastening device with a lower part and an upper part movable in relation thereto. The upper part represents the upper jaw, while the lower part is the lower jaw. Three-dimensional digital data of the lower and upper jaws, as well as occlusion in the central position are taken into account to calculate the motion and limitations fields of the jaws in relation to each other.

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19 cl, 5 dwg

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1 dwg

FIELD: medicine.

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1 dwg

FIELD: medicine.

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1 dwg

FIELD: medicine.

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FIELD: medicine.

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4 cl, 14 dwg, 2 ex

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention relates to chemical-pharmaceutical industry and represents substitute of bone transplant, containing osteogenic agent and zeolite, which contains particles, containing ion-exchange cations of metals, present in quantity, effective for stimulation of osteogenesis in patient who needs it, in which said metal cations are selected from the group, consisting of zinc ions, silver ions, copper ions and their combinations.

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EFFECT: by using set of templates, method enables assessing the hygienic state of any removable dentures with partial adentia.

1 tbl, 3 dwg, 1 ex

FIELD: medicine.

SUBSTANCE: invention refers to medicine and may be used for the formation of a penetration elongation in a solid tissue, particularly a mandibular bone. The device has a tubular body with a peripheral working hole and an opening. The opening is opposite to the working hole and closed with a sealing element. A tool body, e.g. a cutter, extends through the sealing element. The tubular body is provided with a binding element for internal pressure generation.

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15 cl, 8 dwg

FIELD: medicine.

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EFFECT: use of the declared invention enables making signals to an operator to prevent tooth overload in preparation, and the load may be decreased to recommended values.

2 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine. Device with instrument for preparation and implementation of dental implant fixation contains template, which is applied on bone or surrounding it envelope, in particular on mucous membrane. Template or located in it first bush has through hollow. Hollow is made with possibility of introduction into it of instrument or, at least, part of instrument. On instrument second bush travelling on axis is located. Second bush in its main position is fixed on axis by means of self-released connecting elements with specified holding effort in such a way that in case if holding effort is exceeded, connecting elements can be self-released and second bush is capable of travel in axial direction on instrument. Instrument together with fixed on axis second bush can be introduced in through hollow and through external surface of second bush, corresponding to internal surface of hollow, direct and/or orient in template.

EFFECT: exact orientation of instrument and its simple control are achieved.

13 cl

FIELD: medicine.

SUBSTANCE: invention refers to dentistry and aims at implant installation. An implant installation system contains a splint (4) with a drill hole (6) and designed for position specified implant (38) installation in a zone provided for installation in a bone and designed to be placed thereon, and besides containing a screwing instrument (36) for the implant (38). The splint (4) comprises or has a guide surface (52). The screwing instrument (36) has a head (40) whereto the implant (38) is coupled and which has an external surface (48) contacting with the guide surface (52). The screwing instrument (36) has a first limiter (58), and the splint (4) comprises or has another limiter (60) whereto the first limiter of the screwing instrument (36) adjoins at least indirectly when screwing the implant (38) in to preset a fit depth. Another terminator (60) is located in a lower bottom end area turned to the bone inside the drill hole (6) of the splint (4). In the system with the implants (38) having different external diametres, the guide surfaces (52) provided in the splint (4) are matched, and in each case for the implants (38), the drill instruments matched in external dimensions are used.

EFFECT: extended range of the intended facilities.

10 cl, 7 dwg

FIELD: dental surgery; dental implantology.

SUBSTANCE: device for providing safety in dental surgery has drilling tool and stopper intended for mounting depending on required depth of drilling and for preventing penetration for depth being deeper than required one. Drilling and tool have aids for direct and indirect communication and interaction aids intended for movement transformation. Movement transformation takes place when device is in action. Drilling tool is withdrawn backward relatively direction of drilling by means of action of mentioned aids as soon as front part of stopper makes contact with adjacent surface. According to proposed version, device is provided with aid for preliminary calibration and storage of data related to depth of drilling. Aid has standard member in form of transparent calibration member, and piston. Piston can be provided with rod. Top surface of the member corresponds to zero mark at calibration. External diameter of member equals to external diameter of stopper. Method of preliminary calibration and storage of data on depth of drilling is based upon usage of reference member to surface of which reference member the front surface of stopper is pressed against. Piston is pressed down inside case by means of devices which relate drill with stopper. End of working part of drill makes pushing influence on piston until top surface of piston finds its position at calibration mark.

EFFECT: increased safety of operation.

19 cl, 10 dwg

FIELD: dental surgery; dental implantology.

SUBSTANCE: device for providing safety in dental surgery has drilling tool and stopper intended for mounting depending on required depth of drilling and for preventing penetration for depth being deeper than required one. Drilling and tool have aids for direct and indirect communication and interaction aids intended for movement transformation. Movement transformation takes place when device is in action. Drilling tool is withdrawn backward relatively direction of drilling by means of action of mentioned aids as soon as front part of stopper makes contact with adjacent surface. According to proposed version, device is provided with aid for preliminary calibration and storage of data related to depth of drilling. Aid has standard member in form of transparent calibration member, and piston. Piston can be provided with rod. Top surface of the member corresponds to zero mark at calibration. External diameter of member equals to external diameter of stopper. Method of preliminary calibration and storage of data on depth of drilling is based upon usage of reference member to surface of which reference member the front surface of stopper is pressed against. Piston is pressed down inside case by means of devices which relate drill with stopper. End of working part of drill makes pushing influence on piston until top surface of piston finds its position at calibration mark.

EFFECT: increased safety of operation.

19 cl, 10 dwg

FIELD: medicine.

SUBSTANCE: invention refers to dentistry and aims at implant installation. An implant installation system contains a splint (4) with a drill hole (6) and designed for position specified implant (38) installation in a zone provided for installation in a bone and designed to be placed thereon, and besides containing a screwing instrument (36) for the implant (38). The splint (4) comprises or has a guide surface (52). The screwing instrument (36) has a head (40) whereto the implant (38) is coupled and which has an external surface (48) contacting with the guide surface (52). The screwing instrument (36) has a first limiter (58), and the splint (4) comprises or has another limiter (60) whereto the first limiter of the screwing instrument (36) adjoins at least indirectly when screwing the implant (38) in to preset a fit depth. Another terminator (60) is located in a lower bottom end area turned to the bone inside the drill hole (6) of the splint (4). In the system with the implants (38) having different external diametres, the guide surfaces (52) provided in the splint (4) are matched, and in each case for the implants (38), the drill instruments matched in external dimensions are used.

EFFECT: extended range of the intended facilities.

10 cl, 7 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine. Device with instrument for preparation and implementation of dental implant fixation contains template, which is applied on bone or surrounding it envelope, in particular on mucous membrane. Template or located in it first bush has through hollow. Hollow is made with possibility of introduction into it of instrument or, at least, part of instrument. On instrument second bush travelling on axis is located. Second bush in its main position is fixed on axis by means of self-released connecting elements with specified holding effort in such a way that in case if holding effort is exceeded, connecting elements can be self-released and second bush is capable of travel in axial direction on instrument. Instrument together with fixed on axis second bush can be introduced in through hollow and through external surface of second bush, corresponding to internal surface of hollow, direct and/or orient in template.

EFFECT: exact orientation of instrument and its simple control are achieved.

13 cl

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment. An apparatus comprises a tip and an electric signal flow. The tip is bagged and vibrates about an axis at a thread connection with a pneumatic hose. The bag comprises electric flow contacts. The flow is designed for beeping when the contacts are bridged by a tip surface rotated at a certain angle. The contacts are detachably wired to disconnect the electric unit from the apparatus. Inside the bag, there are fixed elastic wires directed towards to the tip to be positioned load-free on a bur in the middle of the bag.

EFFECT: use of the declared invention enables making signals to an operator to prevent tooth overload in preparation, and the load may be decreased to recommended values.

2 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medicine and may be used for the formation of a penetration elongation in a solid tissue, particularly a mandibular bone. The device has a tubular body with a peripheral working hole and an opening. The opening is opposite to the working hole and closed with a sealing element. A tool body, e.g. a cutter, extends through the sealing element. The tubular body is provided with a binding element for internal pressure generation.

EFFECT: sealing element enables executing at least one feed motion, drive or control motion of the tool.

15 cl, 8 dwg

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine, is applicable in dentistry and involves a method for preparing a dental instrument, the dental instrument configured to be used by a dentist, a set of pads to be used by the dentist (versions) and a method for the tooth preparation for treatment (versions). A method for making the dental instrument comprising the pad and configured to be used by the dentist; the instrument has at least one dental cutting instrument used for the tooth structure extraction, involves the stages: detecting the pad sized after the above tooth and after at least a portion of an adjacent tooth; modelling the pre-detected horizontal, vertical and inclined motions, which are supposed to be repeated by at least one dental cutting instrument to extract at least a portion of the detected portion of the tooth to be extracted; detecting the first and second guide edges inside the pad; making the above detected pad with the above first and second guide edges. The above first guide edge corresponds to the above pre-detected horizontal, vertical and inclined motions. The second guide edge inside the pad is remote from the first guide edge at a distance d. The second guide edge corresponds to the above pre-detected horizontal, vertical and inclined motions. The first and second guide edges are thereby presented to contact the dental cutting instrument to direct its horizontal, vertical and inclined motions in accordance with the pre-detected horizontal, vertical and inclined motions to remove at least the above portion of the pre-detected portion of the tooth to be extracted.

EFFECT: group of inventions enables providing the accurate tooth treatment for the following stage of treatment both by experienced and inexperienced dentists.

21 cl, 8 dwg

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