JPS5846161U

JPS5846161U - Tooth ultrasonic thickness measuring device

Info

Publication number: JPS5846161U
Application number: JP14150981U
Authority: JP
Inventors: 高沢　義一
Original assignee: 三菱電機株式会社
Priority date: 1981-09-24
Filing date: 1981-09-24
Publication date: 1983-03-28

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は歯に冠をかぶせた前面図、第２図は歯に冠をか
ぶせる前の側面図、第３図は歯に冠をかぶせた後の側面
図、第４図はこの考案による一実施例を示す図である。図中１は神経、２は象牙質、６，７は象牙質の厚み、９
は接触媒質、１０は探触子、１１は同期部、１２は送信
パルス発生回路、１３は受信回路、１６は厚み計測部、
１７は時間測定回路、１８は距離測定回路、１９はパル
ス発生回路、２１は表示器、２２は比較回路、２３は設
定手段、２４はレベル検知回路、２６は警報器である。なお、図中同一部分あるいは相当部分には同一符号を付
して示しである。Figure 1 is a front view of a tooth with a crown placed on it, Figure 2 is a side view of the tooth before it is crowned, Figure 3 is a side view of the tooth with a crown placed on it, and Figure 4 is a side view of the tooth with a crown placed on it. It is a figure showing an example. In the figure, 1 is the nerve, 2 is the dentin, 6 and 7 are the thickness of the dentin, and 9
10 is a couplant, 10 is a probe, 11 is a synchronization section, 12 is a transmission pulse generation circuit, 13 is a reception circuit, 16 is a thickness measurement section,
17 is a time measurement circuit, 18 is a distance measurement circuit, 19 is a pulse generation circuit, 21 is a display, 22 is a comparison circuit, 23 is a setting means, 24 is a level detection circuit, and 26 is an alarm. In addition, the same parts or corresponding parts in the figures are indicated by the same reference numerals.

Claims

[Claims for Utility Model Registration] A transmitting pulse generating circuit that generates a transmitting pulse based on a signal from a synchronizing part, and a transmitting pulse that is brought into contact with the dentin of a tooth via a couplant, and generates the transmitting pulse with force. In response, the ultrasonic probe that generates the ultrasonic signal and the level of the ultrasonic echo signal obtained by the ultrasonic probe within a predetermined time are detected, and when the level is above a predetermined value, it is detected. a level detection means for generating a signal; a time measurement means for measuring the ultrasonic propagation time from the dentin surface of the tooth to the nerve based on the ultrasonic echo signal; and an ultrasonic propagation time measured by the time measurement means. a thickness measuring means for measuring the propagation distance of the ultrasonic echo corresponding to the thickness from the dentin surface to the nerve based on the thickness, a setting means for setting a reference thickness, and an ultrasonic echo measured by the thickness measuring means. a comparison means for comparing the propagation distance of the signal with a reference thickness value set by the setting means; and an output of the level detection means and the comparison means. An ultrasonic tooth thickness measuring device comprising: an output of an alarm; and an alarm means for issuing an alarm.