Metering system for mouth cavity

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, and particularly to metering systems for mouth cavity. System comprises registering device, comprising photodetector and light source, interface joined to registering device and comprising light-conducting prism, in which there is a surface of registration and surface of image generation. In process of use surface of registration is brought closely to or in contact with surface of chewing, front surface or one of side surfaces of metered row of teeth or into mouth cavity, and surface of image generation is joined to registering device. At the same time registering device is arranged with the possibility of disconnection from interface, prism represents Bauernfind prism, and source of light emits white light. Source of light is located opposite to one of prism sides and is arranged so that it may illuminate metered row of teeth or mouth cavity continuously or for a short period of time.

EFFECT: device application makes it possible to increase viewing angle to obtain image of the whole surface of row of teeth or whole mouth cavity in a single operation.

9 cl, 5 dwg

 

Background of invention

The technical field

This invention relates to a measuring system for the oral cavity, designed to take pictures of some of the teeth or the oral cavity, which are required to be measured, and the number of teeth is chewing surface, and front and two side surfaces, and there are gaps at the point of contact between two adjacent teeth, and the measuring system for the oral cavity contains the registering device having a photodetector and a second interface, which is connected with the registering device, and contains the light guide prism, which has a recording surface and the receiving surface of the image, and this recording surface during use is provided in contact and/or at a short distance from one surface of the measured number of teeth or measured in the oral cavity and the surface receiving the image connected to a recording device.

The level of technology

Such a measuring system for the oral cavity is known from a European patent application EP-A-0250992. In this known measuring system for the oral cavity prism has an elongated shape and works as tilted at a 45° mirror with United with him a pure element. Since the first light p is the surface, which reflects the incoming image is located at a 45° angle and dimensions of this surface is limited because the lens must be kept in the mouth during image acquisition, this known measuring system for the oral cavity can give the pictures are only a small part of the row of teeth or oral cavity.

Summary of the invention

The purpose of this invention is to provide a measuring system for the oral cavity described in the preamble of the type with which the whole surface of the row of teeth, or all of the oral cavity can be photographed in a single operation. For this purpose, the measuring system for the oral cavity according to this invention differs in that the prism is a prism Bauernfeind. Prism Bauernfeind is a well-known prism. In her first reflective surface inclined at an angle smaller than 45°, and thus, using such a prism having a small height, it is still possible to obtain an image of the entire surface of the row of teeth or the entire mouth. It is preferable that the recording surface is at least virtually the same size as one of the above surfaces of the row of teeth.

Preferably, the angles of the longitudinal section of the prism were respectively 22°-2°, 49°-59° and 95°-105°. In the prism of the optimal shape of the corners of the longitudinal section of the prism are respectively 27°, 54° and 99°.

In addition, the length of the sides of a longitudinal section of a prism in a preferred embodiment, respectively 40-50, 76-86 and 94-104 mm In the prism of the optimal shape of the lengths of the sides of a longitudinal section of the prism, respectively, 45,5, 81 and 98.9 mm

One embodiment of the measuring system for the oral cavity according to this invention differs in that the prism has such a shape that the recording surface shows little or no visible reflection of the contours of the surface of image acquisition. Therefore, reflect the contours of the surface of the image receiving surface, which in this embodiment is a recording surface, fall outside of the boundary edges of the recording surface. This means that the resulting image contains no clutter, which could have a negative impact on the quality of the image.

Another embodiment of the measuring system for the oral cavity according to this invention is characterized by the fact that on the surface receiving the image and the recording surface has a non-reflective coating.

In order to prevent damage (scratches) to a recording on which ernesti prism, preferably, before the recording surface had a protective plate, which also has on both sides a non-reflective coating.

Another embodiment of the measuring system for the oral cavity according to this invention differs in that the measuring system for the oral cavity also contains a removable protective cover that fits over the top of the prism and protects at least in contact side, and this protective case has a non-reflective coating on both sides and/or has a device that prevents condensation on the outer surface.

To facilitate bringing the interface in a desired position relative to the row of teeth or oral cavity so that you can make a reproducible photograph of one of the embodiments of the measuring system for the oral cavity according to this invention differs from the recording surface of the interface has at least one optical mark. Preferably, on the recording surface had more than one optical brand. Stamps can be performed, for example, in the form of dots or small circles. After the interface will be placed on the row of teeth or in front of it or in the oral cavity, the interface can be moved forward or turn up until the arch will not take a definite position relative to the row of teeth or oral cavity.

For faster and better to compare with each other photos, another embodiment of the measuring system for the oral cavity is characterized by the fact that the interface on the recording surface or near it there is at least one protrusion, which during use is brought into contact with a part of at least one of the above surfaces measured number of teeth or leave in at least one of spaces between two adjacent teeth. Part of the row of teeth is used here as the basis, so that the interface can be inserted easily and reproducibly on a number of the teeth using this ledge. Thus, the resulting pictures can be directly compared with each other, and do not require prior alignment with each other.

Preferably, during use of the projection rests against the teeth that border the gap in the middle of the front row of teeth.

Another embodiment of the measuring system for the oral cavity according to this invention is characterized by the fact that the interface has at least two protrusions that are arranged on the recording surface of the prism or, provided that the interface includes more than one prism on the recording surfaces of at least two prisms When using two or more tabs of the interface can be positioned relative to the row of teeth is easier and more reproducible.

In addition, it is preferable that one of the projections was located on the recording surface, so that it during use in contact with part of the side surface of the measured number of teeth.

Another embodiment of the measuring system for the oral cavity according to this invention differs in that the interface contains four prisms Bauernfeind, in which the registering surfaces are located relative to each other so that one recording surface during use, rests on the chewing surface of the measured number of teeth or located next to it, one recording surface rests against the front of the row of teeth or located next to it, and the two recording surfaces rest against the side surfaces of the row of teeth or are near them. Thus, in one dimension it is possible to obtain a photograph of the occlusal surfaces and the outer surface of the upper and lower teeth. If the recording surface rests on the chewing surface of the row of teeth, this recording surface forms a surface of reference, relative to which the interface is located.

In order to get a clearer picture of the number of teeth or the oral cavity, it is preferable that at least one of sitotroga the x surfaces of the prism Bauernfeind had a reflective coating.

Moreover, it is preferable that the recording device contained display. This means that during installation of the interface in the specified position can be aligned relative to the row of teeth or the oral cavity and, in addition, it is possible to get a first impression from a number of teeth or the oral cavity.

In yet another embodiment, the recording device comprises a source of UV light. Transmitting element (prism) in this case, it is preferable to perform from transparent to UV-light plastic, such as polymethylmethacrylate. Upon irradiation of the invisible UV light tooth enamel, dentin and available organic films emit visible light of different colors and intensities (fluorescent emission). The effect of fluorescence allows to make a conclusion about the state of the row of teeth or the oral cavity by differences in color and intensity on the pictures on the degree of wear or the presence of dental plaque and bacteria.

In another embodiment, or in combination with the previous in the registering device includes a source of infrared light. Depending on the wavelength of the tooth tissues are transparent to IR light, or have a specific absorption peaks, which correspond to the absorption of collagen (organic substances), hydroxyapatite (mineral) and proteins of bacteria. EN is Liz paintings absorption and picture transmission via the tooth (for the last measuring system for the oral cavity should be designed in such a way, to the light source and the recording device was on both sides of the tooth) allows to make a conclusion about the state of the row of teeth on the degree of calcification and the presence of caries, or you can get an image of the internal surface of the teeth and surrounding gums.

Preferably, the source of UV and/or IR light located opposite the surface of the image receiving prisms.

In order to get a picture of the row of teeth or the oral cavity, it is preferable that the recording device contains a light source which can emit white light.

Preferably, the white light source located opposite one of the sides of the prism.

Preferably, the recording device contained lighting device, which is designed in such a way that they can illuminate the measured number of teeth or the oral cavity continuously or within a short period of time. Continuous lighting can for example be used during installation of the interface close to the row of teeth or in the mouth, and brighter intermittent lighting may be used during image acquisition of the series of teeth or the oral cavity. Intermittent lighting of high intensity is necessary in order to cause fluorescence.

Preferably, registrera the expansion device could be disconnected from the interface. This means that different interfaces, for example intended for adults and young children, can be connected to one recording device and, thus, will not need a different recording device for each interface.

This invention also relates to the interface that can be used in the measuring system for the oral cavity according to this invention.

Brief description of drawings

The invention will be more fully disclosed below based on the drawings, which shows one embodiment of a measuring system for the oral cavity according to this invention.

figure 1 shows a bottom view of the first variant implementation of the measuring system for the oral cavity according to this invention, designed to measure the occlusal surfaces of the upper or lower row of teeth;

figure 2 shows a side view of the measuring system for the oral cavity, shown in figure 1;

figure 3 shows a bottom view of the interface of the second variant implementation of the measuring system for the oral cavity according to this invention, designed to measure the outside or the chewing surfaces of the upper or lower row of teeth;

figure 4 shows a side view of the interface shown in figure 3; and

figure 5 shows one of the options, issue the log of the cover, which can be placed on top of the interface to improve the hygienic characteristics.

Detailed description of drawings

Figure 1 and 2 shows the bottom view and side view, respectively, of the first variant implementation of the measuring system 1 for the oral cavity according to this invention. The measured number 3 teeth is chewing surface 5, the front part 7 and two side surfaces 9, and there are gaps 11 in the points of contact between the two coupling teeth. This measuring system 1 to the oral cavity used to measure masticatory surface 5 of the upper or lower row 3 teeth and contains the interface 13 and the recording device 15, which can be disconnected from the interface using, for example, a connection with a sliding insert.

In the interface 13 includes a prism 19 Bauernfeind, one face of which forms the surface 21 of the Desk, and the other surface forms a surface 23 of the image acquisition. The surface 21 of the Desk during use, rests on the chewing surface 5 of series 3 of the teeth and the surface 23 of the image acquisition is connected with the registering device 15. On the surface 21 of the Desk and the surface 23 of the receiving image has a non-reflective coating.

The angles a, b and C longitudinal section, or lateral projection, prisms amount ACC is respectively 27°±0,1°, 54° and 99°±0,1°, and the length of the k, l, m sides longitudinal-sectional or lateral projection, prisms, respectively 45,45, 81 and 98,89 mm

In order to prevent damage to the surface 21 of the Desk, in front of the surface of the Desk can be placed protected disc (not shown), which has a non-reflective coating on both sides.

On the surface 21 of the registration interface 13 has two tabs 29, 31, the first of which, 29, is located on the center line 33 of the prism 19, and the second, 31, is located near the extreme points on the side of the prism. During use, the first protrusion is located in the gap 11a between the average plane 33 number 3 teeth, and the second protrusion 31 is in contact with a part of one of the side surfaces 9 of the measured number of teeth.

One of the surfaces 35 of the prism performs the role of the reflective surface and has a reflective coating 37 and covered with a protective coating 39.

Register 15 contains the device 41 of the image recording in the form of integrated circuits on a CCD or CMOS (complementary MOS) integrated circuit, a display 43 and connected electronic device 45, which may be connected via cable 47 data with an external device such as a computer. Recording device 45 also includes a semitransparent mirror 49, a lens 51, the source 52 UV light and the source of 53 white light, when atomistic light 52, 53 are designed so that they can illuminate the measured number of teeth continuously or within a short period of time. Sources of UV light are opposite surface 23 of obtaining images of the prism, and the white light sources are placed opposite sides 17 of the prism. Both sources of light have provisions for stabilizing the intensity of light.

Recording device 15 when illuminated by the light sources 52, 53 works with both short-wave and long-wave light, ranging from the far ultraviolet region of the spectrum to the far infrared region and with all visible wavelengths.

Figure 3 and 4 show respectively a view from below and to one side of the interface 55 of the second variant implementation of the measuring system for the oral cavity according to this invention. The measuring system for the oral cavity is used to measure the outer surface (i.e. the front part and both side surfaces and the chewing surfaces of the upper or lower row of teeth and also contains the interface 55 and detachable device registration.

In contrast to the first variant implementation, this interface 55 includes four prisms 57-63, one for chewing surface, and it fully complies with the prism in the first embodiment, one for the front of the row of teeth, and two for the side stand is of Resta row of teeth. Moreover, the recording device consists of four parts (not shown), each of which is connected with a prism.

The surface 65 of the Desk prism 57 rests on the chewing surface 65 of the measured number of teeth, the surface of the Desk 67 prism 59 is located to the front of the row of teeth, and the recording surface 69 and 71 of the prism 61 and 63 are adjacent to side surfaces of the row of teeth.

This interface 55 also has two tabs 73 and 75. One of the projections 73 is located on the surface 67 of the Desk prisms 59 and the other leg 75 is located on the surface 65 of the Desk prism 57.

To improve the hygienic characteristics of the measuring system for the oral cavity has a transparent secure the cover 77, which can be placed on top of the interface, see Figure 5. Secure the cover 77 is made, for example, of plastic or rubber and firmly planted on top of the interface. Preferably, the protective cover 77 was slightly less than the interface, so that it was necessary to slightly stretch when putting and then it is pushed to the interface. Figure 5 shows a protective cover 77 for an interface designed for chewing surfaces of the teeth, turned upside down. In this case, the bottom side is that side which is located on top of the recording surface of the prism.

what aka protective cover 77 is suitable for placing on top of the portion of the free end of the prism, which corresponds to the prism 19, depicted in figure 1 and 2, but in this case without the protrusion 31, but with the tab 29. For this purpose, a secure cover 77 has a protruding portion that can be placed on top of the ledge 29 on the surface of the Desk.

On both sides of the protective cover 77 has a non-reflective coating and, in addition, on its outer surface has a coating that prevents condensation.

Instead of protective covers 77, which can be cleaned after use or which can be disposed at the interface can also be applied to a temporary layer, for example by dipping interface in the liquid, such as liquid polymethylmethacrylate, so that the liquid layer was plastered on the interface and hardened with the formation of the transparent layer.

Although the above invention is explained based on the drawings, it should be noted that the invention is in no way limited to variants of execution shown in the drawings. This invention covers all embodiments of the different embodiments shown in the drawings, but in the context defined by the points of patent claims. As mentioned in the introduction, the measuring system for the oral cavity can also be used to obtain photographs of the mouth, not the row of teeth.

1. Izmeritel the Fes system for the oral cavity, designed to obtain images of the measured number of teeth or oral cavity contains a recording device containing a photodetector and the light source, and a second interface connected to a recording device, and containing a pure prism, which has the surface of the Desk and the surface of image acquisition, and during use the surface of the Desk is close or in contact with the chewing surface, the front surface or one of the side surfaces of the measured number of teeth or the oral cavity, and the surface image acquisition is connected with the recording device, wherein the recording device is configured to detach from the interface, prism is a prism Bauernfeind, and the light source emits white light, is located opposite one of the sides of the prism and is designed in such a way that can illuminate the measured number of teeth or the oral cavity continuously or within a short period of time.

2. The measuring system according to claim 1, wherein the registration device comprises a source of UV light, which is opposite the surface of the image receiving prisms.

3. The measuring system according to claim 1, characterized in that the recording device contains a source Tsveta, which is opposite the surface of the image receiving prisms.

4. The measuring system according to claim 1, characterized in that on the surface receiving the image and the recording surface has a non-reflective coating.

5. The measuring system according to claim 1, characterized in that the front surface of the Desk has a protective plate on both sides which has a non-reflective coating.

6. The measuring system according to claim 1, characterized in that the measuring system for the oral cavity also contains a removable protective cover that fits over the top of the prism and protects at least the exposed side, with protective cover on both sides has a non-reflective coating and/or on the outer side has a device that prevents condensation.

7. The measuring system according to claim 1, characterized in that the recording surface of the interface has at least one optical mark.

8. The measuring system according to claim 1, characterized in that the interface on the surface of the Desk or next to it there is at least one protrusion, which during use is in contact with a part of at least one of these surfaces measured number of teeth or inserted into at least one of spaces between two adjacent teeth.

9. Measure the other system according to claim 1, characterized in that at least one of the reflective surfaces of the prism Bauernfeind has a reflective coating.



 

Same patents:

FIELD: optics.

SUBSTANCE: reflecting prism can be used in projection displays and other optical devices. Reflecting prism for bringing plane of polarization in rotation is made of optically transparent material and it has shape of rectangular parallelepiped with three truncated angles in form of prisms. Isosceles triangular bases of those prisms belong to mutual perpendicular sides of parallelepiped. One side face of any prism has to be cutting plane which forms one of three working surfaces of reflecting prisms. Working surfaces of prism are disposed at angle of total internal reflection and they are made for series reflection of incident light beam which cones to reflecting prism at angle of 90 degrees to its side to form exit light beam being co-linear to incident beam. Working surfaces at reflection of beam provide turn of plane of polarization.

EFFECT: improved reliability of operation.

6 cl, 3 dwg

FIELD: visual devices; range finders; IR optical systems.

SUBSTANCE: prism unit has prism and two structure identical wedge compensators mounted in front of input and behind output faces of prism for rotation around axis belonging to main cross-section of prism. At initial position the input face of second compensator is parallel to output face of first compensator. Compensator can be composed of two like wedges glued together. Wedges are made of materials having different dispersion coefficients or refractivity factors. The wedges are connected in such a manner that bigger base of one wedge at main cross-section has to be prolongation of smaller base of the other wedge.

EFFECT: improved precision of prism unit.

8 cl, 1 dwg

The invention relates to optical instruments, namely inverting prisms, and can be used in binoculars and other optical systems for various purposes

The invention relates to optical devices for rotation of the image in the channels of optical devices with high requirements for the speed and weight when working in parallel beams of rays

Laryngoscope // 2030898
The invention relates to a device for examination of the larynx and conduct of intubation during anesthesia in a patient

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to dentistry and can be used in dentoalveolar pathology treatment. A control device for dentoalveolar pathology treatment results comprises a common platform. On the common platform, there are rigidly fixed opposed cefalostate with a frontal support, vertical graduated guides for a chin support with clamps and a precision camera on a guide perpendicular to a plane of the cefalostate. The camera is removable in the horizontal plane forward-backward and turnable at an angle and about a vertical axis. The device is supplied with vertical frames. The vertical frames, vertical guides and camera guide are graduated.

EFFECT: objectified assessment of treatment quality, enabled control of treatment results in dynamics with taking into account specific features of the initial state of solid tooth tissues, parodentium tissues and dentoalveolar anomalies.

2 tbl, 1 ex, 3 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medical measuring equipment and can be used for determining linear dimensions and area of different anatomical formations of jaw-facial region, angles in degrees of ratio between them both outside and in oral cavity in normal and pathologic states. During examination of patients during polyclinic reception by doctors of various specialisation. For determination of dimensions of small neoplasms and wounds both outside and in oral cavity, description of dental images. Device for determination of anatomical formations in dentistry and X-ray image description represents transparent film with marking applied on it. Marking is applied by laser ray and has form of circle with 3 cm diametre, which is divided into sectors from 0 to 315 degrees. Quarter of circle has millimetre net.

EFFECT: ensuring simplicity of device manufacturing, low cost, increase of examination accuracy and safety, availability for manufacturing and replication.

5 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to dentistry and can be used for root apex positioning. A positioner is provided with a fastener. The fastener has a holder on a tooth to be treated or an adjacent one. Simultaneously, the fastener comprises a signal transmitter between the root apex positioner and an endodontic instrument, and signal transmitters between said device and a patient.

EFFECT: declared apparatus allows eliminating wire connection problems and ensures the complete license when positioning the root apex.

22 cl, 5 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medicine and is intended for determination of marginal adaptation of composite hermetic to hard tooth tissues. After composite hermetic sealing of fissures, dental deposit is removed thoroughly. A tooth is saliva-isolated with cotton swabs. An investigated tooth surface is thoroughly air-dried. A passive electrode is fixed in the oral cavity. A microdrop of electrolyte - 10% calcium chloride is applied on a tooth surface. An active electrode is applied on a point on the hermetic-tooth interface. Electric current of power - 3-5 V is passed. If the electrical conduction of hard tooth tissues is 0-1 mcA, complete marginal adaptation of the hermetic is diagnosed. If said value exceeds 1 mcA, disordered marginal adaptation of hermetic to hard tooth tissues is diagnosed.

EFFECT: method allows for early determination of loss of sealing of coating, improves accuracy of determination of degree of marginal adaptation of composite hermetic to hard tooth tissues.

3 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine and can be used for evaluation of patient's chewing efficiency both before planning orthopedic dental treatment, and after prosthetics with application of substituting orthopedic apparatuses. Functional (chewing) test is carried out. On the basis of chart with preliminarily calculated coefficients of chewing efficiency and taking into account coefficients of age and tooth row state, as well as type of substituting apparatus qualified efficiency of chewing is calculated.

EFFECT: method allows to determine chewing efficiency, individualise results of patients' chewing efficiency taking into account age and state of tooth rows.

1 tbl, 1 ex

FIELD: medicine.

SUBSTANCE: invention is intended for veterinary science. A gingival contour probe contains a handle piece and an elongated end piece. The latter is attached with its proximal end to the handle piece. The end piece is curved and/or arched and contains markings in number and with a scale to characterise the measured lengths. At least by number and/or scale of markings, the probe fits for application in easy measurement of a gingival edge on a conscious animal. The probe is used to implement the method of quantitative estimation of dental deposit on a conscious animal. The method involves the stages (a) matching the end piece of said gingival contour probe and the gingival edge of an animal, (b) measuring the length of the gingival edge and the length of deposition, if any is observed on gingival markings of the end piece of the probe, and (c) calculating the quantitative indicator of dental deposit by comparing the length of deposition and the length of the edge.

EFFECT: invention provides ease of use.

21 cl, 2 dwg, 1 ex

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, in particular to dentistry, and can be applied for diagnostics of supporting-holding apparatus or tooth tissue, surrounding implant. Force is applied to implant, providing change of its position from normal and measurement of angular displacement value. Implant of circular transversal cutting is loaded in point, which is located in the middle of projecting from periodontal part tissues part of implant, by force of pair of forces by means of sinkers, suspended to implant. Angles of its turning by laser pointer, rigidly fastened on implant end are registered on monitor, which is placed in front of implant. Measured are deviations from central line on monitor, which are index of implant displacement from established norm. Coefficient of rigidity of dental implant fastening in bone is determined by mathematic formula. If value of coefficient of rigidity 15≤KJ≤25, conclusion is made that level of rigidity of implant fastening allows its loading with orthopedic construction.

EFFECT: method allows to realise reliable determination of degree of rigidity of dental implant fixation in bone in order to evaluate possibility of its primary, secondary and repeated loading with orthopedic construction.

4 dwg, 1 ex

FIELD: medicine.

SUBSTANCE: invention concerns medicine and aims at prediction of complications following denture treatment with partial secondary adentia. Tomography data are used to derive the ultimate areas of projections of intraalveolar teeth roots limiting a denture defect, and similar teeth with on the opposite side on a relative plane. The plane is parallel to an occlusive plane. The full perimetre of the tooth is examined for bone tissue. It is followed with the comparative analysis of crevicular fluids amount related to intact parodentium and parodentium wherein pre-clinical changes are possible. If the ultimate areas of projections of intraalveolar teeth roots of symmetrical examined teeth are equal, a tooth is considered to be stable.

EFFECT: offered method allows observing tooth stability in norm and resorption of alveolar bone.

2 ex, 1 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to dentistry, and can be used for estimation of functional state of dento-alveolar apparatus (DAA). During estimation of DAA electromiograms (EMG) from chewing muscles are registered. On registered EMG seven stages are determined, where at the first stage amplitude of EMG at rest stage is determined, at the second stage amplitude of EMG of maximal jaw pressure, at the third stage time of EMG amplitude stabilisation after maximal jaw pressure is determined, at the fourth stage EMG amplitude after maximal jaw pressure is determined, at the fifth stage EMG amplitude during test material grinding is determined, at the sixth stage time of EMG amplitude stabilisation after test material grinding is determined, at the seventh stage EMG amplitude after test material grinding is determined; at each stage EMG amplitudes and areas under EMG from left and right chewing muscles are analysed. At each stage asymmetry coefficient is determined as ratio of EMG amplitude values from left and right chewing muscles, and if asymmetry coefficient is less than 0.8 and higher than 1.2 DAA pathology caused by disorder of temporo-mandibular joint (TMJ) and, or muscle tone is diagnosed. If time of EMG amplitude stabilisation after maximal jaw pressure and, or performing twenty chewing movements is more than 2 seconds and EMG amplitude value at which signal stabilised is higher than 0.05 mV, pathologic state of chewing muscles is diagnosed. If ratio of EMG maximal amplitude during test material grinding and amplitude of EMG of maximal jaw pressure differs from values 60-75% pathology of chewing muscles and, or pathological afferentation from joint and, or disorder of neuro-humoral regulation of chewing muscle function is diagnosed. Registration of EMG at rest after maximal pressure and after performing 20 chewing movements is carried out during 25 seconds, criterion of quality registration being absence of artefacts during registration.

EFFECT: method ensures increase of quality of estimation of functional state of dento-alveolar apparatus due to clear quantitative evaluations.

11 cl, 2 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to orthopedic dentistry, and can be applied for registration of clicking noise in temporo-mandibular joint (TMJ) in patients with TMJ dysfunction, caused by masseter muscle dysfunction, in order to diagnose pathology and evaluate conducted therapy efficiency. Axiography with displacement of lower jaw in vertical plane is performed and clicking noise corresponding to reposition or dislocation of articular disc is registered by deviation of trajectories of opening or closing of mouth on axiogram from the norm. In case if trajectories of opening or closing of mouth deviate from norm on axiogram sections corresponding to starting phase of mouth opening and final phase of mouth closing, first clicking noise is diagnosed, corresponding to reposition of articular disc in starting phase of mouth opening, and second clicking noise, corresponding to dislocation of articular disc in final phase of mouth closing. In case if trajectories of opening or closing of mouth deviate from norm on axiogram sections corresponding to middle or final phase of mouth opening and middle or starting phase of mouth closing, first clicking noise corresponding to dislocation of articular disc in middle or final phase of mouth opening, and second clicking noise corresponding to reposition of articular disc in middle or starting phase of mouth closing.

EFFECT: method allows to detect changes of masticatory apparatus at early stages of disease, determine position of joint elements, elaborate individual for each patient treatment policy and to control its results.

3 cl, 3 dwg, 3 ex

FIELD: medicine.

SUBSTANCE: invention relates to dentistry and can be used for control in case of dental implantation. X-ray examination of implantation area is carried out immediately before operation and after implant installation, during operation process and after implant installation. X-ray radiation receiver during each examination is placed in patient's mouth in area of implantation and is fixed there for the time of said examination. Cone of microfocus X-ray tube of interacting with said receiver portable X-ray apparatus is tightly pressed to examined area of maxillofacial part outside. Survey which registers state of implantation area at given moment is carried out. Result in form of corresponding image on monitor, connected with receiver, is obtained. Survey modes are selected depending on patient's age and on examination area.

EFFECT: method allows to respond in operative way to appearing in process of implantation procedure changes, reduce risk of complications.

6 cl, 5 ex

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to dentistry and can be applied in case of parodontitis disease. Estimation of density of lower and upper jaw bone tissue is carried out by means of digital densitometry by images obtained by scanning orthopantomograms. Confidence interval is built for true value y in population calculated by binary regression by formula y=α+βx, where x is mean value of density of lower and upper jaw bone tissue, y is line of regression, whose calculated value equals 126.4716, α is absolute term of estimation line, characterizing y value when x=0; β is angular coefficient characterising value by which y increases in the average, if x is increased by 1. If value of roentgenological density of jaw bone tissue is lower than 126.4716, presence of risk of parodontitis development is determined.

EFFECT: method allows to determine risk of parodontitis development objectively and with high accuracy, irrespective of collateral factors such as accompanying diseases, and irrespective of patient's age.

Up!