RU2004213C1 - Parodontometer - Google Patents

Description

The invention relates to dentistry, in particular to devices for the functional diagnosis of dentoalveolar system.

 A device for determining the functional state of the dentofacial system is known, comprising an elastic plate with a support pad at the working end and tensor resistors placed on both sides of the main elastic plate, the latter being located at an angle to the lateral elastic plates, and their supporting platforms are parallel, except In addition, the main and additional elastic plates are cantilevered in the holder.

The purpose of the invention is to improve the accuracy of measurement,

Periodontometer M.V. Bekmetove-T.A. Khodzhemetova contains a housing 1 with a working body in the form of a detachable two-shoulder stop 3 and a measurement unit, the measurement unit is made in the form of a variable slide resistor 6 installed in the housing 1, the slider 5 of which is located in the sliding sleeve 7 and is located between the working body 3, 4 and a calibrated spring 8, while the variable resistor 6 is connected through the peak level meter 11 to the input of the analog-to-digital converter 12, the digital outputs of which are connected via a linearized read-only memory 13 s with indicators 14 inputs.

In FIG. 1 shows a device, a General view; in FIG. 2 is a block diagram of a measurement unit. Periodontometer M.V. Bekmetova - T.A., Khojimetova consists of a housing 1, made in one piece with a handle 2, consisting of a working body and a measuring unit (see Fig. 1), a working body, which is made in the form of a removable two-shoulder stop 3, the radius of which determined by the shape of the tooth under study and interacting through the pusher 4 with the slider 5 of the variable resistor b, located in the sliding sleeve 7, installed in the housing 1 with a calibrated spring 8, fixed by a fixing screw 9, while the pusher 4 is rigidly connected to the sliding sleeve 7 and 5 change slider resistor 6, which protects it from possible rotation around the longitudinal axis during the study. A button 10 is located on the handle 2 to collect the measured maximum reading. FIG. 2 shows a device measuring unit connected to a recording device, which includes a peak level meter 11, the output of which is connected to the analog input of the analog-to-digital converter 12, digital outputs are connected to the address inputs of a read-only memory device (ROM) 13, and the outputs ROM - with inputs of indicators 14,

The peak level meter 11 (see Fig. 2) consists of a diode 15 connected to a variable resistor b and a storage capacitor 16, in parallel with which a reset button 17 is connected.

The device operates as follows. A removable two-arm emphasis 3 is selected, the radius of which is determined by the shape of the tooth under study. Holding the handle 2, a removable two-arm stop 3 is inserted into the pusher 4 and screwed to the end of the thread, which prevents them from turning around the longitudinal axis.

Then, alcohol is treated with a stop 3, which at the points of contact of the test tooth is covered with an elastic neutral material (food rubber), which protects the hard tissues of the test tooth from damage.

Holding the device by the handle 2, the working body is inserted into the oral cavity of the patient and

precisely set to the equator perpendicular to the axis of the test tooth. Further, the researcher, applying horizontal force to the handle 2, gradually develops pressure until the appearance of a lung

0 pain in the periodontium of the tooth. In this case, the two-arm stop 3, interacting through the pusher 4, with the slider 5 of the variable resistor 6, placed in the sliding sleeve 7, acts on the calibrated spring 8, which is compressed, while the slider 5 of the variable resistor 6 moves, changing the resistance.

The voltage taken from the middle terminal of the variable resistor 6 and proportional to the force of the tooth under study is supplied to the input of the peak level meter 11, and several similar measurements are taken, after which the peak level meter outputs

5 11 the maximum of the measured voltages is fed to the input of an analog-to-digital converter 12, the output code of which, upon completion of the analog-to-digital conversion, is supplied to the address inputs

0 is a permanent memory device 13, the programming card of which corresponds to the algorithm for converting the nonlinear channel of measuring force - the output of the analog-to-digital converter 12. to

5, a linear reading of a digital indicator connected to the outputs of the read-only memory 13. Thus, the maximum endurance and stability of the tooth periodontium is measured from several force measurements.

The measurement is reset by pressing the reset button 17.

(56) Copyright certificate of the USSR No. 1003454. cl. A 61 C 19/04, 1988.

Claims (1)

The claims A periodometer comprising a body, a working body made in the form of a removable two-shouldered stop, a pusher and a measurement unit, characterized in that, in order to increase the accuracy of measurements, it is equipped with a spring-loaded sliding sleeve placed in the body and connected to the pusher, a meter peak level, analog-to-digital converter 1G in this case, the measurement unit is made in the form of a variable-slider resistor, the slider of which is connected to a sliding sleeve and a pusher, and the variable resistor is connected to the input of the analog-to-digital converter through the peak level meter, the outputs of which are through the storage device are connected entrances indicators. FIG. 2.