Dentistry – Apparatus – Having heater or electrode
Patent
1986-03-07
1987-11-24
Peshock, Robert
Dentistry
Apparatus
Having heater or electrode
A61C 300
Patent
active
047086475
ABSTRACT:
A periodontal probe instrument for measuring the depth of the gingival sulcus and periodontal pockets. A probe extending from a handle of the instrument includes a transparent portion which is insertable into the periodontal pocket. An optical fiber extends through the probe and may be retracted until its end is barely visible at the gingival line. A potentiometer driven by the retraction mechanism for the fiber generates an electrical output signal having a voltage proportional to the position of the fiber to provide a measure of the pocket depth. The signal is used to digitally display and print each measurement that is taken.
REFERENCES:
patent: 3058225 (1962-10-01), Ward
patent: 3559292 (1971-02-01), Weissman
patent: 3943914 (1976-03-01), Grenfell et al.
patent: 4250895 (1981-02-01), Lees
Pippin David J.
Stindt Diana J.
Peshock Robert
The Curators of the University of Missouri
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