Surgery – Truss – Pad
Patent
1982-04-26
1985-01-29
Howell, Kyle L.
Surgery
Truss
Pad
33125A, 356373, 433 69, A61B 510
Patent
active
044959524
ABSTRACT:
An apparatus for the contactless measuring of the movement in three dimensions of the jaw and of the condyle in the temporo-mandibular joint respectively comprising opto-electronic signal transmitters and signal receivers between which light signals are transmitted. In one embodiment, a measuring head having light transmitters and light receivers mounted therein is secured to the lower jaw and moves with the lower jaw relative to reflecting plates. The light receivers generate signals varying with the length of the light path between the transmitter and the receiver and thus represent the movement of the lower jaw. In a second embodiment, the light transmitters generate collimated beams of light and are fixed to move with the lower jaw with respect to light receivers which have biaxial position sensitivity to the transmitted light beams. In a third embodiment, light beam transmitters are moved with the lower jaw relative to gratings so as to generate light pulses corresponding to movement of the lower jaw.
REFERENCES:
patent: 3784309 (1974-01-01), Brelot et al.
patent: 4249076 (1981-02-01), Bergstrom et al.
patent: 4275393 (1981-06-01), Johnston
patent: 4358960 (1982-11-01), Porter
"Photoelectric Mandibulography: A Technique for Studying Jaw Movements", Barrie R. D. Gillings, J. Pros. Dent., pp. 109-121; Feb., 1967.
"Investigation of Functional Mandibular Movements; Theodore Messerman et al., Dental Clinics of North America, pp. 629-642; Jul., 1969.
"A Digital Optoelectronic Method for Recording Mandibular Movement in Association with Oral Electromyograms and Temporomandibular Joint Noises" A. J. Duxbury et al; Medical and Biological Engineering", pp. 707-711; Sep., 1974.
Hanley John C.
Howell Kyle L.
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