Electrical pulp testing instrument

Details Electrical pulp testing instrument Electrical pulp testing instrument

1978-03-20

1980-04-15

Cohen, Lee S.

Dentistry

Apparatus

Having heater or electrode

128741, A61C 1904

Patent

active

041976410

ABSTRACT:
A hand-held instrument is illustrated wherein a counting cycle may be initiated by pressing the active electrode against a tooth to be examined. A digital to analog converter controls a battery operated current source to supply stimulating current pulses whose intensity is linearly increased in steps at the counting rate, independently of the electrical resistance presented by the external current flow path. The counter controls an indicator which displays the successive output current values, and displays the last reading for a predetermined time interval at the end of the counting cycle.

REFERENCES:
patent: 2204295 (1940-06-01), Brockman
patent: 2522052 (1950-09-01), Logan et al.
patent: 3128759 (1964-04-01), Bellis
patent: 3794022 (1974-02-01), Nawracaj et al.
patent: 3886950 (1975-06-01), Ukkestad et al.
patent: 3921624 (1975-11-01), Vogelman
patent: 3933147 (1976-01-01), DuVall et al.
patent: 3943919 (1976-03-01), Landgraf
Watson, "Field Collection . . . Electro-Ejaculation" Australian Veterinary Journal, vol. 40, Apr. 1964, pp. 183-187.
Gneco et al., "A New Apparatus . . . Work Physiology," Med. & Biol. Eng., vol. 9, No. 6, pp. 705-710, 1971.

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