Self-contained periodontal probe for remote recordations

Details Self-contained periodontal probe for remote recordations Self-contained periodontal probe for remote recordations

1989-09-05

1990-10-02

Hindenburg, Max

Surgery

Truss

Pad

433 72, 33514, A61B 510

Patent

active

049601326

ABSTRACT:
A periodontal probe which is structurally isolated from a recording device and which is touch-activated. The probe includes a tubular probe body and a semi-rigid fiber extending from a forward segment of the probe body for insertion into an anatomical pocket of a patient. A slider member within the probe body is connected to the fiber at one end and to an iron-nickel core at the opposite end. The fiber is inserted into an anatomical pocket in a fully extended position. After contact with the base of the pocket, the fiber begins to retract into the probe body. Thus, the fiber and the core move relative to the probe body. The probe body is brought into contact with the upper extent of the anatomical pocket, so that the portion of the fiber extending from the probe has a length equal to the depth of the pocket. The core is received within a coil winding, and the relative position of the core within the coil winding determines the inductance of a LC oscillator. Consequently, the frequency of the oscillator varies with the extension of the fiber from the probe body. The oscillator is connected to a timer which controls current through an infrared LED. Output from a timer is triggered by the operator of the periodontal probe merely by making contact with an electrically isolated region on the probe body. Finger contact causes a change in capacitance at the isolated region to activate the transmission of data.

REFERENCES:
patent: 3058225 (1962-10-01), Ward
patent: 3297021 (1967-01-01), Davis et al.
patent: 3543405 (1970-12-01), Banhart
patent: 3559292 (1971-02-01), Weissman
patent: 3943914 (1976-03-01), Grenfell et al.
patent: 4340069 (1982-07-01), Yeaple
patent: 4463759 (1984-08-01), Garito et al.
patent: 4677756 (1987-07-01), Simon et al.
patent: 4791940 (1988-12-01), Hirschfeld et al.

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