Dental cavity measuring instrument

Details Dental cavity measuring instrument Dental cavity measuring instrument

1982-03-08

1984-05-01

Wilson, John J.

Dentistry

Apparatus

Having gauge or guide

33174D, A61C 300

Patent

active

044458576

ABSTRACT:
An instrument for measuring the depth of a periodontal pocket cavity including a probe needle, a needle holder and a handle, has a hinge construction whereby the needle with the needle holder is pivotable relative to the handle against the action of a bias spring which has a flat spring characteristic within the restricted pivoting range of the hinge.

REFERENCES:
patent: 2545881 (1951-03-01), Graham
patent: 2787837 (1957-04-01), Gelfand
patent: 4141345 (1979-02-01), Allen et al.
patent: 4203223 (1980-05-01), Lautenschlager et al.
patent: 4340069 (1982-07-01), Yeaple
"A Simple Constant-Force Pocket Probe", Borsbroom et al., pp. 390-391, vol. 52, No. 7.

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