Method and device for determining the length of a root canal of

Details Method and device for determining the length of a root canal of Method and device for determining the length of a root canal of

1975-03-10

1976-11-23

Howell, Kyle L.

Surgery

Truss

Perineal

32 40R, 32 57, 33174D, 128 21Z, A61B 505

Patent

active

039930440

ABSTRACT:
A method and device for measuring the length of a root canal of a tooth in which a reference signal obtained by placing an electrode or terminal of an oscillator in the gingival tissue and a signal obtained by inserting an electrode or terminal of an oscillator into the root canal are phase locked and mixed in a product detector to produce an electrical quantity indicative of the length of the root canal.

REFERENCES:
patent: 3058225 (1962-10-01), Ward
patent: 3199024 (1965-08-01), Manly et al.
patent: 3320946 (1967-05-01), Dethloff et al.
patent: 3660901 (1972-05-01), Inoue
patent: 3753434 (1973-08-01), Pike et al.
patent: 3901216 (1975-08-01), Felger

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