SU1212421A1 - Process for determining mobility of teeth - Google Patents

Description

The invention relates to medical technology and is intended for the functional diagnosis of solid tissue in the maxillofacial region.

The aim of the invention is to increase

accuracy and measurements.

 - j

, -, .. - ;. d ..

Fig. 1 shows a device for determining the MOBILITY of a tooth (| in | general view; in Fig. 2 4-t: | c eMa of the connected measuring

Plates 19 and 20 are insulated from the measuring rod 3 by a layer of ceramic 26. Plates 21 and 22 are connected to the conductor 27 by soldering 28, and plates 19 and 20 are connected to the conductor 27 by a return spring 29. As guides of the measuring rod 3, made of PCB, serve as an insulating sleeve 30 and a brass sleeve 31

Unit 4 sets the load and block 5; la fig.Z - slave scheme with the device for moving movement fixed on the regulation To determine the mobility of the teeth.

. ,,. ..

The device for determining the mobility of the teeth comprises a cylindrical body 1 inside which there is a hollow cylindrical frame 2 for fastening the elements of the device, a measuring rod 3, a load setting unit 4 and a movement detection unit 5. Unit 4 task load is made in the form of serially connected article 15

arm 32 with a latch 33 mounted on a tripod 34 mounted on the base 35. A support frame 36 is also fixed on the tripod 34 for orienting the head of the patient.

A device for determining tooth mobility is used as follows. With the help of an adjustable bracket 32 and a latch 33, the measuring brush 3 is brought to the front by means of the regulator 6, the measuring unit 7, before contact with the voltage stabilizer 6. In the initial position of pressure removal, pressure sensor, made in the form of inductance coil 8 with core 9, made in the form of a hollow cylinder and placed at the end of measuring rod 3, and node 10, the indicative diagram of the bridge 18 is balanced and the indicators of the movement reference unit 25 and the display unit 10 pressure is in zero position. When turning on the device from the stabilizer 6 voltage through

pressure ratings. The pressure sensor is fixed 25; the pressure control unit 7 is pinched by the frame 2 with the help of two plastic loads on the pressure sensor. Current

The pressure sensor inductance flowing through this coil 8 induces electromagnetic induction in it, which is connected to the output washers 11 and 12. The sensor input is connected to the output of the pressure control unit 7 by means of the connector 13, and the output to the "". .., .i.iral s. and the inlet of the pressure indication assembly 10. The core acts on the core 9 and the ejector 9 is provided with an induction coil 8 made of insulation. The material of the sleeve 14, which before switching on the device, prevents the core 9 from sticking. variable voltage from the stabilizer 15 is supplied to the generator 16, the output

The movement recording unit 5 is connected to the input of a matching transformer in the form of serially-connected transformers 17. The signal from the secondary voltage obli- bator 15, generator 16, the transformer coil 17 goes to plates 2 and 22 connected to the measuring bridge arm block 5 of the registration of movements, with plates i9 and 20 included in the second shoulder of this bridge.

When the measuring rod 3 moves under the action of a pressure force caused by electromagnetic induction in the inductor coil .8, the bridge becomes unbalanced. The unbalance signal is fed to the input

Metrically with respect to plates 19 and 20, the amplifier 23 amplifies and enters the current diagonal of the measuring bridge, the rectifier 24, and then is connected to the reference unit 25 through a matching transforming displacement on which the generator 17 is registered to the output of the generator 16, and the measurement of the movement of the tooth or tissue in the forcible diagonal of the bridge is connected to the input, depending on the size of the applied pressure amplifier 23..

a matching transformer 17, a displacement transducer made in the form of a measuring bridge 18 formed by four pairs of plates 19-22, an amplifier 23, a rectifier 24 and a displacement count unit 25. The plates 19 and 20 are fixed on the measuring rod 3, and the plates 21 and 22 are fixed inside the cylindrical frame 2 sim40

Plates 19 and 20 are insulated from the measuring rod 3 by a layer of ceramic 26. Plates 21 and 22 are connected to the conductor 27 by soldering 28, and plates 19 and 20 are connected to the conductor 27 by a return spring 29. As guides of the measuring rod 3, made of PCB, serve as an insulating sleeve 30 and a brass sleeve 31

The load task unit 4 and the motion detection unit 5 are fixed to the regulator 15.

arm 32 with a latch 33 mounted on a tripod 34 mounted on the base 35. A support frame 36 is also fixed on the tripod 34 for orienting the head of the patient.

A device for determining tooth mobility is used as follows. With the help of an adjustable bracket 32 and a latch 33, the measuring brush 3 by the front part is brought into contact with the volume of the measurement 2 o. In the initial position, the measuring circuit of the bridge 18 is balanced and the indicators of the displacement reference unit 25 and the pressure indication assembly 10 are in the zero position. When turning on the device from the stabilizer 6 voltage through

 pressure control unit 7 applies the supply voltage to the pressure sensor. Current

tromagnetic induction, which in its ochen ",." .., .and. iral s.i p acts on the core 9 and the ejectors of the inductance coil 8. g turn on the device

2

FIG. H

Editor V. Ivanova Order 664/5

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Compiled by V. Zaitsev

Tehred I. VeresKorrektor M. Pojo

Circulation 659 Subscription

Claims (1)

A DEVICE FOR DETERMINING DENTAL MOBILITY, comprising a cylindrical body, a load setting unit, a measuring rod and a rod displacement sensor, characterized in that, in order to increase the measurement accuracy, the load setting unit is made in the form of a series-connected voltage stabilizer, pressure control unit, pressure sensor and pressure indication unit, the device is equipped with a rod movement registration unit made in the form of series-connected voltage stabilizer, generator, I agree -. a transformer, a displacement sensor, an amplifier, a rectifier, and a displacement reference unit, the pressure sensor made in the form of an inductor with a core made in the form of a hollow cylinder and placed at the end of the measuring rod, the input of the inductor is connected to the output of the pressure control unit, and the output is to the input of the pressure indication unit, while the displacement sensor is made in the form of a measuring bridge formed by four pairs of plates, of which two pairs are mounted on the measuring rod, and the other two the pairs are mounted motionless in the housing symmetrically with respect to the first two pairs of plates, the current diagonal of the bridge being connected to the output of the generator, and the measuring diagonal of the bridge being connected to the input of the amplifier. Figure 1