Dental stethoscope

Details Dental stethoscope Dental stethoscope

1980-04-28

1981-11-24

Stellar, George G.

Surgery

Truss

Pad

128734, A61C 1904

Patent

active

043026273

ABSTRACT:
A measurement channel oscillator and a reference channel oscillator are provided in combination, a measurement probe and a mouth mucose lead element are respectively connected to the measurement channel oscillator, while one of a plurality of equivalent circuits each consisting of a pair of equivalent capacitor and equivalent resistor connected in parallel is selectively connected to the reference channel oscillator, the respective equivalent circuits corresponding to different stages of a decayed tooth, and the outputs of the measurement channel oscillator and the reference channel oscillator are respectively connected through the respective channels of a 2-channel stereo amplifier to a stereo head-phone, whereby an erosion stage of a decayed tooth can be correctly examined even if it is located at a hardly visible position in the mouth.

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