Root canal measuring apparatus

Details Root canal measuring apparatus Root canal measuring apparatus

1979-05-09

1981-06-16

Peshock, Robert

Dentistry

Apparatus

Having condition sensor to transmit signal to regulate...

128734, A61C 1904

Patent

active

042735319

ABSTRACT:
A root canal measuring apparatus can measure a length of a root canal without using an oral electrode. The apparatus is composed of an oscillating circuit having a relatively high output impedance, an output terminal connected to one output end of the oscillating circuit and also connected to a tooth electrode, another output terminal connected to the other output end of the oscillating circuit and also connected to a conductive portion forming an electrostatic capacity with a patient, and a display unit for displaying a variation in voltage between both the output terminals.

REFERENCES:
patent: 3866600 (1975-02-01), Rey
patent: 3894532 (1975-07-01), Morey
patent: 3901216 (1975-08-01), Felger
patent: 3916529 (1975-11-01), Moussew
patent: 3993044 (1976-11-01), McGuffin
patent: 4177799 (1979-12-01), Masreliez

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