SU1299578A1 - Arrangement for determining state of dental tissue - Google Patents

Abstract

The invention relates to medical technology and can be used in dentistry. The purpose of the invention is to determine the hardness of the tooth tissue when installing the crown. The device consists of a housing 1, inside of which the limiter 2 is placed

Description

adjusting the stroke of the work item. Inside the housing 1 there is a sleeve 5 with guides for the nut 4. On the housing 1 there is a barrel 12 for fastening the tip in the drill. In the glass 7, a spring of 8 dp is created to create a constant pressure force of the working element, 1 O to the surface. The invention relates to dentistry, namely to dental instruments.

The aim of the invention is to determine the hardness of the tooth tissue when installing the crown,

In Fig. 1 shows the device, a general view; FIG. 2 is a section A-A in FIG. one,

 The dental tip consists of a housing 1, inside of which is placed a stop 2 of a smooth adjustment of the stroke of the working element consisting of a screw 3 and a nut 4. Inside the housing 1 there is a sleeve 5 with a guide 6 for a nut 4 located inside the sleeve 5. Screw 3 is freely located on the sleeve 5 and is rigidly connected to the glass 7. Inside the glass 7, there is a spring 8 and a shank 9 of the working element 10. The working element 10 is connected to the glass 7 by means of etotnova 9, made in the form of a square. At the end of the screw 3, a driver 11 is made for connection with a drill drive (not shown). A cup 12 is mounted on the housing for fastening the tip in the drill. In the cup 7, between the screw 3 and the stem 9 of the working element 10, a spring 8 is installed to create a constant force against the working element 10 against the surface of the tooth. The screw 3 and the nut 4 of the limiter 2 of smooth adjustment create a strictly constant predetermined number of revolutions of the working element 10. Inside the sleeve 5 there are spacers 13 for adjusting the stroke of the nut 4. Inside the glass 7 between the spring 8 and the stem 9 of the working element 10 are installed spacers 4 for adjusting the force to press the working element 299578

carry a tooth. In case 1, a scale 17 measuring the immersion depth of the working element 10 is made, which is used; it is in the tube 18. Having determined the hardness of the tooth tissues, it is possible to predict the possibility of further progressing of the pathological abrasion of the teeth. 2 Il.

0

15

0

25

thirty

35

0

10 to the surface of the tooth by a spring 8. In the glass 7, a hole 15 is made, c. which has a pointer 16 in the form of an arrow. The pointer 16 is hinged to the shank 9 of the working element 10. In the housing 1, a scale I7 for measuring the immersion depth of the working element .0 is made. Work item 10 is placed in the tube 18.

We offer: our tip works as follows.

The cup 12 of the body 1 of the handpiece is mounted on a drill (not shown). The leash 11 is coupled to a drive of the harmagin (not shown).

When pressed to the tooth surface of the working element 10, the latter is flush flush with the tube 18, compressing the spring 8. At the same time, the indicator 16 on a scale 17 indicates the initial (zero) position of the working element 10. After that, the drive of the drill is turned, which rotates the screw through the leash 11 3, the rotating cup 7 and the shank 9. The shank 9 transmits the rotation of the working element 10. At the same time, the nut 4 of the stopper 2 from the extreme upper position along the guides 6 of the sleeve 5 moves to the extreme lower position, ensuring that O-speed of the working element 0. Reaching the lower position, the nut 4 stops the rotation of the screw 3. During the rotation of the working element 10, the latter chooses a hole in the body of a certain depth (not more than 0.3 mm), depending on the hardness of the measured area tooth surface. The pointer 16 is then shifted on a scale of 17 by a certain number of divisions, which allows

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It is possible to judge the hardness of a tooth at a given point. To measure the hardness of the next portion of the tooth surface, the nut 4 is returned to its original (uppermost) position by reverse rotation of the screw 3.

Thus, a constant predetermined number of revolutions, regulated by the stroke of the nut 4, a constant pressing force of the working element 10 k, the tooth surface provides, in the case of the same hardness of the tooth surface, the same depth of the working element 10 into the tooth body. With different hardness of the x-surface of the tooth, the depth of the hole of the tooth varies. The smaller the depth of the tooth hole, the harder the tissue of the forelock, and vice versa.

This device makes it possible to determine with absolute accuracy the lifetime hardness of the tooth tissues when the crown is inserted. After sampling the hole in the tooth (no more than 0.3 mm deep) ne84

By installing the crown, the tooth is ground by grinding, with the result that the hole disappears and the crown is placed on the smooth surface of the tooth.

In addition, by knowing the hardness of the tooth tissues, it is possible to predict with further accuracy the further progression of the pathological abrasion of the teeth, and from now on and the choice of one or another orthopedic structure aimed at eliminating or inhibiting this pathology.

Claims (1)

The invention of the device for determining the state of the dental tissue, consisting of the body in which the spring is located, and the working element, characterized in that, in order to determine the hardness of the tooth tissue when installing the crown, it is provided with a limiter for smoothly adjusting the movement of the working element at a constant the number of its revolutions. Editor M. Tsitkina Compiled by S. Klypkin Tehred A. Kravchuk Order 957/3 Circulation 596 Subscription VNSHSHI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 FIG. 2 Proofreader L. Patay