Method of treating caries

FIELD: medicine.

SUBSTANCE: method involves measuring an electric potential, performing the mechanical processing of involves dental tissues, and therapeutic treatment. The electric potential is measured in any of acupuncture points (AP) found on the face and connected to the involved teeth. The mechanical processing is performed with using an excavation burr. The electric potential is measured in the acupuncture points throughout the whole mechanical processing of the teeth every 5 seconds. If observing a drastic fall of the electric potential by more than 5 mV has the therapeutic effect on the teeth by terminating the mechanical processing of the teeth and continuing it at a lower rpm.

EFFECT: method provides the higher clinical effectiveness by reducing the pain sense in the patient by controlling the electric potential measurement continuously in one of any acupuncture points found on the face and connected to the involved teeth.

4 dwg, 2 ex

 

The invention relates to medicine, in particular to dentistry, and can be used for physiological treatment of hard tissues of teeth in the treatment of caries.

One of the most common operative procedures in dental practice and, in particular, in dentistry, is the treatment of hard tissues of teeth of different burs in the formation of carious cavities in the treatment of caries and its complications.

Modern dental units have a fairly high technical capabilities enables using the process handle not only a wide range of speeds from 3,000 to 250,000 rpm, but also various types of cooling - water, air, air-water, etc.

These modern technical characteristics of dental units can not only significantly reduce the time of preparation of hard tissues of teeth, to reduce the degree of occurrence of discomfort in patients, but also to spend the most gentle handling of hard tissues of teeth.

The relevance of these studies lies in the fact that caries is one of the most common diseases of the human body that affects virtually the entire population, regardless of age and sexual identity, and that daresay initial form of caries of enamel are already causing pathological changes not only in dentin, but in the pulp of the tooth. Therefore, any, even more uncontrolled mechanical action during processing of the cavities, causing additional, sometimes severe irritation to the already modified in varying degrees, solid tissues, and especially of the tooth pulp (S. Seltzer, I. Bender. The pulp of the tooth. M.: Medicine. - 1971. - p. 94).

Therefore, only one mechanical action causes very serious injury not only to the tooth hard tissues - enamel and dentin, but primarily the pulp of the tooth, which is further complicated by increasing the number of revolutions of the rotating boron and the simultaneous application of water, air or air-water cooling. This is well illustrated by studies of numerous authors.

It was set in (Swerdlow N. and Stanley N. R. J. A. D. A., 1958, 56, 317) that when the operative treatment of carious cavities with / without cooling at a speed of 20,000 rpm, odontoplasty pulp subjected to injury. But at the same speed, without cooling, the reaction of odontoblasts is much more acute.

Moreover, even at even lower speeds from 5,000 to 15,000 rpm (Marsland, E. A. and Shovelton S. D. Brit. Dent. J., 1957, 102, 213) treatment of carious cavities without cooling has on odontoblast pulp more destructive effect than, for example, the speed below 3000 rpm rotation Speed cutting�about tool from 3000 to 30,000 rpm even with the use of cooling is very dangerous for the pulp. But the greatest damage is applied to odontoblasts at speeds up to 50000 rpm Was installed (Langeland K. Acta odont. scand., 1961, 19, 397) that when using a speed 300 rpm (foot speed drills), the reaction of odontoblasts was minimal or not at all. Similar results were obtained Marsland and Shovelton (E. A. Marsland and Shovelton S. D. Brit. Dent. J., 1957, 102, 213) at the speed of 500 rpm is only slightly higher than the foot speed of a drill.

Thus, as shown by the studies of many authors, most physiological, which do not damage the pulp and processes of odontoblasts is speed not exceeding 500 rpm (in the range of 300-500 rpm).

The problem of pain and analgesia in dentistry is very important. Most of the manipulations dentist severe pain syndrome of varying severity, up to a very intense pain that occur in many patients fear of visiting the dentist. Thus, a negative experience that is associated with the absence of adequate analgesia in these patients entails the inability to complete dental treatment in the future because of a delay in referring the patient to the dentist.

In addition, modern patients of cor�control demands superior dental treatment. Quality dental anesthetic management intervention plays a critical role in creating an environment of comfort and has many causes. The fact that the implementation of anesthesia is a necessary and integral part of dental treatment today is not in doubt

In dentistry to prevent pain, for example, when processing carious cavity, most commonly used medical methods. Among them, the highest prevalence in the clinic method of local anesthesia, which involves injecting and application methods of influence (Anisimova E. N., Zorian, E. V., Rabinovich S. A. Mepivacaine in the practice of a dentist. J. Clinical stomatology. - 1999. - №4).

However, local anesthesia is not always effective and do not always completely eliminate pain sensitivity in the area of intervention.

Thus there is a systemic effect on the body of substances that are part of the local anesthetic drug (local anesthetic, vasoconstrictor, preservatives and stabilizers). The disadvantage of this method is that each patient during the injection: 1) applied mechanical injury during the movement of the injection needle; 2) there is a constant risk of injury important nervous �of twolove and nerve (mandibular, facial nerves, etc.) as well as other anatomical structures; 3) the injected anesthetic solution is also certnum foreign chemical irritant, which causes additional, already chemical injury; 4) in addition, there is a risk of allergic reactions up to anaphylactic shock with all the ensuing consequences. Usually painful reaction occurs in the moment, when increasing the rotation speed of boron, solid tooth tissue begin to rapidly overheat, leading to certain physico-chemical changes causing irritation painful nerve endings and cause intense generation of pain impulses. So in the treatment of the tooth, in which the formation of cavities under anesthesia is that the uncontrolled increase in the speed of rotation of the dental boron causes serious thermal injury not only the hard tissues of the teeth, but, most important, and the soft tissue (the pulp of the tooth), resulting in severe, sometimes irreversible changes in the pulp - chronic inflammation, which over time leads to complications such as pulpitis, periodontitis, etc.

It is known that biologically active portions of the surface of the skin (acupuncture points), have a direct energy connection with certain to�specific teeth and appropriately changing the value of electric potential depending on the functional state of the tooth (Oskar Mastalier, Reflextherapien in der Zahn-Mund-und Kieferheilkunde. Quintessenz Verlags - GmbH., 1987, 551. S. 88).

It is known that various changes and diseases of organs and systems of the human characteristics of the magnitude of the electric potential change depending on the nature and localization process (Bogatyrev A. I., liaschenko, J. C., I. I. Titarenko, etc. - Some criteria for evaluating the effectiveness and justification of the mechanism of action of electro. - Sat.: Electrical stimulation of organs and tissues. Abstracts of the second all-Union conference. Kiev, 1979, pp. 349-350; Bogatyrev A. I. Lyashchenko D. S. Dynamic pulsometrija acupuncture and electropuncture. - Sat.: Electrical stimulation of organs and tissues. Abstracts of the second all-Union conference. Kiev, 1979, pp. 363 to 366, Hot A. F., Bahmutov A. P., Gurova, L. G., Danilova N. In., Kostenko T. I. Reflexology certain diseases of internal organs in pregnant women. - Theory and practice of reflexology. Abstracts of IV all-Union conference on acupuncture (December). L., 1984, pp. 176-177, F. G. Portnov Electropuncture. - Riga: Knowledge, 1980. - p. 220).

Known method of treatment of pain syndrome in which examine the abnormal part of the body of the patient, choosing the biologically active points (BAP) by pressly, focusing on pain, with subsequent effects on BAT applique metal plates, and at first carried out in�Bor points of impact in the immediate area of damage, focusing on the pain, then make an impact on each of the selected BAT pressure for at least 30 s, thus reducing the intensity of pain confirms the correct choice of the point of impact, then the selected BAT is applied to the applicator, which leave the point to the emergence of a sense of itching and burning, healing sessions carried out to the full recovery of the injured organ or body part (patent RU №2268707, IPC AN 39/04, AN 39/08).

However, this method cannot be used to prevent pain during the treatment of the tooth, which usually is a signal about the necessity of regime change impacts on the tooth, during which the pain originated.

Thus, all of the above methods of treatment are not effective enough due to the fact that during their implementation is not possible in time to change the mode of therapeutic effects, before the appearance of pain.

Closest to the claimed invention is a method of treatment of caries involving the measurement of electrical potential at one of the acupuncture points, located on the face and associated with the affected tooth, carrying out machining of hard tissues of the tooth affected by caries, with the use of boron for the formation of cavities and treatment in�of the effects on the tooth with decreasing electric potential in THE associated with it (method of treatment of caries, presented in the description of the copyright certificate 1194415, And, 30.11.1985 g, IPC AN 39/00).

However, this method also does not provide a warning of the occurrence of pain and not very efficient due to the fact that during its implementation is not possible in time to change the mode of therapeutic effects to the occurrence of pain.

The technical result of the claimed invention is to increase the efficiency of treatment of caries by monitoring changes in electric potential in the acupuncture point of the face, associated with the affected tooth, is in the process of treatment.

This technical result is achieved in that in the treatment of dental caries involving the measurement of electrical potential at one of the acupuncture points, located on the face and associated with the affected tooth, carrying out machining of hard tissues of the tooth affected by caries, with the use of boron for the formation of cavities and conducting therapeutic effects on the tooth with decreasing electric potential in THE associated with him, and in accordance with the invention the measurement of the electric potential in THAT is carried out throughout the process of machining of the tooth, with an interval of 5 seconds and with a sharp decrease in electric capacity more than 5 mW who have a therapeutic�actvie for a tooth by stopping the machining of the tooth with subsequent resumption of it at lower rpm Bora.

The method is as follows. With the aid of "Elite-4" find the acupuncture point associated with a bad tooth. If several such points, choose the one that is more convenient to secure the electrode. At the location of the point strengthen electrode, which is connected to a universal electronic voltmeter V7-16, designed for continuous measurement (monitoring) of the magnitude of the electric potential. The voltmeter is connected to the signal device, the measurement of the electric potential in THAT is carried out throughout the process of machining of the tooth with an interval of 5 seconds, and with a sharp decrease in electric capacity more than 5 mW have a therapeutic effect for a tooth by stopping the machining of the tooth boron for the formation of cavities, with subsequent resumption of it at lower rpm Bora. In case of further mechanical action instrument inevitably causes severe pain attack.

The method was tested on patients who underwent treatment of dental caries. A total of 274 patients (108 m, 166 W.) aged 17 to 47 years, they had cured 372 of the tooth, of which 189 teeth on the lower jaw and 183 to the upper jaw. Of the total number of teeth was 166 intact, and with the diagnosis of caries was 206 teeth. The dynamics of indicators of electropotence�La in THAT the surface of the skin, associated with the studied teeth, during machining of the teeth with boron in the treatment of caries.

In the control group there were 2 subgroups: the first subgroup included 88 people with intact teeth, the second 73 patients with teeth affected by caries.

In the first subgroup of the control group was 88 people (29 male, 59 female) aged from 23 to 47 years, they had surveyed 9 THAT associated with the intact teeth on the upper and lower jaws, teeth 166 - 73 tooth was the lower jaw and 93 on the upper jaw with intact (healthy) teeth, which were measured electric potential in THE one related to the studied teeth, throughout the process simulated caries treatment i.e. the use of a rotating Bora, but without touching the tooth, and also when simulating use of the solutions used for processing carious cavities formed before filling (hydrogen peroxide, alcohol, ether).

In the second subgroup of the control group process simulation treatment was carried out in patients with dental caries. In this subgroup was 73 (31 male, 42 female.) aged 22 to 45 years, they had surveyed 9 THAT associated with the intact teeth on the mandible and maxilla, 81 tooth - 47 teeth on the lower jaw and 34 on the upper jaw.

In the first experimental group�e was 54 patients with caries (23 male, 31 female) aged 20 to 43 years, they have also been surveyed 9 associated with the teeth on the mandible and maxilla, decayed - teeth 58, 29 teeth on the lower jaw. Produced the formation of boron carious cavities of the tooth until the marked pain response. In this group of patients, as well as the first control group, we measured the electric potential at THE surface of the skin related to the studied teeth throughout the treatment process with an interval of 5 seconds.

In the second experimental group there were 59 patients with caries (25 men, 34 women) aged from 17 to 42 years, they had cured 67 teeth, 40 teeth on the lower jaw 27 on the upper jaw. They also were examined in 9 THE one associated with the teeth upper and lower jaws. Using dental burs produced the mechanical processing is the formation of carious cavities (removal of the overhanging edges of enamel, softened necrotised infected dentin) when registering the electric potential at intervals of 5 s at the point associated with this tooth. Processing according to the change of electric potential was stopped immediately after a sharp decrease in the electric potential indicators of more than 5 mV, as an objective the prevention of the imminent onset of painful reaction, i.e., before the occurrence of pain.

<> For statistical processing of obtained results was used parametric methods of analysis. Determined the arithmetic mean (M), standard deviations (σ), the average error of the average arithmetic (m), relative values (p, %) and their errors (p±mp). The reliability of differences between mean values was assessed by student's t test. The reliability criterion is denoted by the symbol p. Differences between groups were considered significant at p<0,05. Mathematical processing of the results was performed using software package Microsoft Excel 2000.

As a result of the conducted researches it was found that the performance of electric potential in THE facial skin associated with intact teeth throughout the process simulated caries treatment, i.e. the use of a dental probe, dental excavator, rotary Bora, but without touching the tooth and also when simulating use of the solutions used for processing carious cavities formed before filling (hydrogen peroxide, alcohol, ether), practically did not undergo any significant changes. These indicators are presented in the chart of indicators of electropotentials in energetically active sites associated with intact teeth when simulating the formation of carious cavities (Fig. 1).

As can be seen from the following�the auditors charts the dynamics of the potentials at all stages of the simulation of treatment remains virtually unchanged and did not undergo any significant changes. Compared with the electric potential indicators registered before treatment - 45,906 mV at the end of the simulation treatment they decreased by less than 1 mV, just 0,655 mV, i.e. to 45,251 mV.

To determine the electric potential differences of dynamics when simulating treatment of intact teeth and teeth affected by caries, studies have been conducted of the dynamics of the electric potential when simulating treatment of teeth affected by caries. The results of the analysis of the dynamics of the electric potential when simulating treatment of teeth affected by caries, are presented on the diagram (Fig. 2).

His smooth decrease of THE associated with teeth affected by caries, while simulating the formation of carious cavities teeth intact, slightly different from the dynamics of the electric potential obtained when simulating treatment of intact teeth. So, if the electric potential indicators to simulate treatment of intact teeth were is $ 45,906 mV, and when simulating treatment of teeth affected by caries, were equal - 66,745 mV, the magnitude of the electric potential generated at the end of the simulation treatment were equal: 45,251 mV; and 64,354 mV, respectively.

In the process of mechanical treatment of hard tissues of teeth affected by caries, dental drill with a drill on each manipulative treatment, produced in the hard tissues of the teeth, there was constant dynamic changes of electric potential in THE associated with the treated teeth. It was noted that the most pronounced changes in the electric potential indicators were associated with the use of dental drills and burs, during which, at some stage of processing, the electric potential indicators suddenly sharply reduced by more than 5 mV relative to the indicators that were registered by the voltmeter immediately before the moment of reduction of the electric potential, and further mechanical treatment of carious cavity at the same speed mode Bora, after some time (15-20 seconds), inevitably led to the emergence of pain.

Data dynamics electric potential in the formation of carious cavity with caries after a sharp decrease in the magnitude of the electric potential in the energetically active sites and the onset hereupon pain attack is presented in the diagram (Fig. 3).

As can be seen from the chart, the continuation of the formation of carious cavity with caries, after a sharp decrease in the magnitude of the electric potential in THAT, in all cases, all patients were accompanied by the appearance of pain attack.

Taking into account the data obtained in the first experimental group - after a sharp drop led�ranks electric potential of more than 5 mV at a certain stage of formation of carious cavities of the teeth, affected by caries occurs after this severe painful reaction in patients of the second experimental group mechanical treatment of hard tissues of teeth of the drill was stopped at the time of abrupt decrease ulicny electric potential of 5 mV, in this case, it is found that in none of the examined cases, the treatment of dental caries, none of the patient was not any attack pain response.

Data dynamics electric potentials in THE mechanical treatment of carious cavities in the treatment of teeth affected by caries, and termination processing at the point of a sharp decrease in the magnitude of the electric potential, without causing pain attack, is presented in chart No. 4.

As can be seen from the chart, the termination of the process of formation of carious cavities immediately after a sharp drop in the magnitude of the electric potential in the energetically active sites associated with the treated tooth, prevents the occurrence of pain attack in all studied cases, patients of this group. After the break, and reduce the rotational speed dental Bora, if necessary, continued formation of cavities, which is also stopped immediately, the next time a sharp decrease in the electric potential.

The method can be applied in the treatment of one�about the most common oral diseases - of dental caries and other forms of pathology, for example, in prosthetic dentistry, when grinding teeth under crowns dentures and artificial crowns and secondary prevention of possible complications in the treatment of caries (pulpitis, periodontitis, etc.).

Example. 1 Patient F., aged 36. appealed with complaints of pain that occurs when it enters the cavity of the tooth sour, sweet, salty and hard food. Objectively: on the occlusal surface to the average depth of the carious cavity, the bottom and sides are grey. When probing the bottom and sides loose, pliable, sounding painful. The edges of enamel is whitish, fragile. The diagnosis of secondary caries. Treatment. On the surface of the skin using the apparatus "Elite 4" found THE one associated with the affected tooth 2, and the plaster strengthened the electrode connected with the electronic voltmeter V7-16. In the arm the patient has recovered moistened with saline passive electrode connected to the passive terminal of the electronic voltmeter. Voltmeter included in the measurement mode of the electric potential produced reference measurement electric potential before the start of therapeutic interventions, the patient was equal to 82,809 mV, and then every 5 seconds the automatic, continuous measurement of the dynamics of the electric potential throughout the process of treatment of caries� 2 teeth. At all stages of treatment: zoning, removal of dental excavator softened dentin was observed dynamics of changes in the magnitude of the electric potential in the energetically active portion of the surface of the skin that is associated with the affected 2 tooth. During mechanical treatment of carious cavity with a dental boron and bormashenko also there was constant dynamic changes of electric potential, which at a certain stage of operative treatment of carious cavity with the magnitude of 80,203 mV sharply decreased to a level equal 75,008 mV (5,195 mV), and the further processing of the cavity in this mode for 15 seconds after a sharp decrease in the magnitude of the electric potential, the patient has a strong pain response. If you experience pain mechanical treatment of carious cavity with a dental boron and the drill was stopped, and after the pain is gone, was over the operative treatment of carious cavity boron, but in a more gentle manner at a lower speed of rotation of the dental Bur. After the formation of the cavity its bottom and sides were treated with hydrogen peroxide, dehydrated with alcohol, dried with ether, then overlaid with an insulating gasket and a permanent seal.

Example 2. Patient A., 40 years old appealed with complaints of sharp cutting� pain at the moment of impact with a cavity in the sweet, salty and acidic food. Objectively: on the lateral distal surfaces of 2 teeth average depth of a cavity, the bottom and walls of dirty grey colour. When examining cavities the bottom and sides loose, painful sounding, the edges of the cavity fragile. Diagnosis: acute middle caries. Treatment. On the surface of the skin using the apparatus "Elite 4" found THE one associated with the affected 2 tooth and plaster strengthened the electrode connected with the electronic voltmeter V7-16. In the arm the patient has recovered moistened with saline passive electrode connected to the passive terminal of the electronic voltmeter. Voltmeter included in the measurement mode of the electric potential from 0 mV was made reference measurement electric potential before the start of therapeutic interventions, the patient was equal to 84,604 mV, and then every 5 seconds the automatic, continuous measurement of the dynamics of the electric potential throughout the process of treatment of caries 2 teeth. At all stages of treatment: zoning, evacuation softened dentin dental excavator, there was a constant dynamic changes of the magnitude of the electric potential in THE associated with the affected 2 tooth. During mechanical treatment of carious cavity with a dental boron and bormashenko also noted equ�nye the dynamic changes of electric potential, which at a certain stage of operative treatment of carious cavity with the magnitude 82,164 mV sharply decreased to a level equal 76,133 mV, i.e. 6,031 mV, and further processing of the carious cavity in this mode was discontinued. Processing was completed by boron, but at a lower speed of rotation of the dental Bur. After the formation of the cavity its bottom and sides were treated with hydrogen peroxide, dehydrated with alcohol, dried with ether, then overlaid with an insulating gasket and a permanent seal.

Thus, the claimed method of processing mode of the hard tissues of the teeth, allows an individual to produce a specific patient, the formation of carious cavities in the most optimal physiological modes, painlessly, without injection of pain relief, without the introduction into the body of foreign chemicals - anesthetics, thereby eliminating the occurrence of allergic reactions, causing mechanical trauma to the soft tissues of the oral cavity injection needle that eliminates the possibility of injury to the important nerve endings of the needle point.

Method of processing mode of the hard tissues of the teeth can be used in the treatment of one of the most common oral diseases - dental caries and other forms of pathology, such as orthopaedic Stom�of politology depar tment at, when grinding teeth for dentures, artificial crowns and secondary prevention of possible complications in the treatment of caries (pulpitis, periodontitis, etc.).

Method of treatment of caries involving the measurement of electrical potential at one of the acupuncture points, located on the face and associated with the affected tooth, carrying out machining of hard tissues of the tooth affected by caries, with the use of boron for the formation of cavities and conducting therapeutic effects on the tooth with decreasing electric potential in THE associated with it, characterized in that the measurement of the electric potential in THAT is carried out throughout the process of machining of the tooth, with an interval of 5 seconds and with a sharp decrease in electric capacity more than 5 mW have a therapeutic effect for a tooth by stopping the machining of the tooth with subsequent renewal at lower revs Bora.



 

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FIELD: medicine.

SUBSTANCE: invention refers to medical equipment and may be used in implant surgery. A drill comprises a connective section and a cutting section. The connective section is formed at an upper end of a drill body to be connected to an actuator. The cutting section is formed at a lower end of the body and has a cutting drill blade. An outer annular edge of a distal end of the cutting section projects forwards in relation to the centre.

EFFECT: drill enables the damage-free, fast and safe lift of the mucous membrane accompanying a maxillary sinus surgery.

6 cl, 6 dwg

FIELD: medicine.

SUBSTANCE: invention relates to dentistry and can be used for treatment of teeth canals. Dental rotating machine cutting instrument in accordance with claimed invention contains cutting section, formed on the side of tip, shank, formed at the base, and thinner part, formed between cutting section and shank. Thinner part contains narrowing section, which is wider on tip side and more narrow on the base side, and rectilinear section, which has constant thickness with the same diameter as diameter of narrowing section on the base side.

EFFECT: location of breakage by shank side becomes limited and instrument service term before breakage increases.

5 cl, 7 dwg

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to therapeutic dentistry, and is intended for treatment of chronic periodontitis of moderate severity. Complex therapeutic treatment of teeth including supragingival ultrasound treatment of teeth surface by means of apparatus "Pieson-master 400", teeth polishing by means of apparatus "Air-Flow S2", subgingival treatment of teeth roots and sanitation of periodontal recesses by low-frequency ultrasound from apparatus "Vector", complete sanitation and closed curettage of periodontal recesses by means of diode laser "Prometey" and photodynamic therapy. Photodynamic therapy is performed in the following way: preparation "Photoditasin" (1% gel) is applied on inflamed surfaces of oral cavity mucosa and into periodontal recesses for 8-10 minutes, after that gel is washed away and irradiation of periodontal recess by laser radiation is performed by means of light conductor for 1-2 minutes (depending on recess depth) with application of the following laser settings: wavelength 660±5 nm, radiation power - 0.2 W, continuous mode, total time of procedure - up to 20-30 min. After complex therapeutic teeth treatment, starting from the following day, patient is given a course of acupuncture including acupuncture of points E5 (da-in), E6 (Chia-che), J24 (cheng-jian), GI4 (he-gu), E36 (tsu-san-li). Time of impact on points is 15-20 min. Course of treatment includes 10 sessions. After finishing acupuncture course subgingival treatment of teeth roots and sanitation of periodontal recesses by low-frequency ultrasound from apparatus "Vector" is repeated to patient.

EFFECT: method makes it possible to increase efficiency of chronic periodontitis treatment, prolong remission, avoid surgical methods of periodontitis treatment due to complex impact on all links of disease pathogenesis.

2 ex

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and can be used for fabrication of stomatologic burrs. Proposed method comprises producing burr shank and head, their soldering, grinding, checking, finishing and packing. Plasma is produced in the flow of plasma-forming gas in vacuum chamber on feeding voltage to flat electrodes. The latter are connected to high-frequency generator at vacuum chamber pressure of 26-40 Pa for 1-3 min. Flow rate of plasma-forming argon makes 0.03-0.05 g/s, current density on article surface makes 0.15-0.3 A/m2, ion energy makes 90-110 eV. Burrs are arranged in the gap between parallel flat electrodes along plasma-forming gas flow.

EFFECT: higher wear resistance, reduced production costs.

3 tbl, 1 dwg

FIELD: medicine.

SUBSTANCE: group of inventions relates to dentistry and can be used in endodontics. Method of tool manufacturing includes cutting hollow spiral groove, which continues the spiral cutting edge, by moving the blank part in the direction of its filing. The blank part is slowly rotated in front of a rotating grinding wheel and repeat the stage of cutting several times in accordance with the selected number of cutting edges of the tool. Then a conical section of the blank part is provided with a diametre not exceeding the diametre of the active part of the manufactured tool more than 20%.

EFFECT: increase of speed of manufacturing of threaded cutting bodies of endodontic instruments, especially instruments made of alloy of nickel and titanium.

27 cl, 3 dwg

Dental tool // 2301046

FIELD: medicine; dentistry.

SUBSTANCE: dental tool can be used for mechanical treatment of tooth's neck. Dental tool has swivel work head, bur with working tip and axis, which bur is fixed in swivel work head. Limiter is introduced into tool additionally; limiter is made in form of cone-shaped member and it is provided with restricting protrusion, first and second support protrusions, recess and channel for supplying cooling liquid. There is deepening between first and second support protrusions. Channel for supplying cooling liquid comes to deepening; working tip is disposed inside channel to have gap for provision of ability of tip's rotation. Limiting protrusion is disposed at external side of working end and it is made in form of smoothed step. Axis goes through mentioned recess. First support protrusion has rounded shaped.

EFFECT: reduced traumatism of gums; improved precision of treatment.

3 dwg

FIELD: stomatology, possibly endodontic instrument.

SUBSTANCE: powered dental instrument includes working part with axle and handle. Handle is arranged on end of axle opposite relative to working part and it is provided with rotation drive unit that may engage with rotation drive device mounted over head of handle. Rotation drive unit of handle that may engage with rotation drive device arranged over head of handle is made of flat metallic part that may be mounted, for example onto axle of working part and has at least one opening. Said opening provides motion of polymeric material forming handle at casting onto axle and also it provides joining with axle of rotation drive unit of handle that may engage with rotation drive device arranged over head of handle.

EFFECT: improved design of dental instrument having gear wheels whose teeth are characterized by low breaking off strength or small early wear resistance.

7 cl, 6 dwg

Dental borer // 2286744

FIELD: medicine; dental boring.

SUBSTANCE: dental bore for removal of plaque from teeth of total amount of caries dentine or part of it and part of pre-caries dentine, has working surface with cutting members. Cutting members are made for deflection, deformation or attrition when they meet material with pre-selected hardness within 1-40 KHN interval inside which interval the hardness is chosen preliminary to be lower than lower limit of hardness of normal dentine. Bore is capable of making differences selectively between soft caries dentine of different levels of hardness non-depending on operator's control.

EFFECT: minimization of pain; improved efficiency of treatment.

6 cl, 3 tbl, 5 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: group of inventions refers to medicine, namely to paediatrics, and can be used to control an amount of breast milk consumed by a nursing infant. The method involves measuring a breast electric resistance and a breast electric capacity before and after breastfeeding. The derived values are multiplied to obtain the characteristics variation information during the breastfeeding. The change information are related to the amount of milk consumed by the infant. What is presented is a breastfeeding control system, which comprises an electric capacity measuring unit designed for measuring the electric capacity variations before and after breastfeeding. Besides, the system comprises a breast electric resistance measuring unit. Also, the system comprises a processing unit configured to calculate the product of the electric capacity and the electric resistance, and to match the derived product with the amount of milk consumed by the nursing infant.

EFFECT: inventions enables controlling the amount of breast milk consumed by the infant and assessing the adequacy of breastfeeding.

16 cl, 20 dwg, 3 ex

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