Patent
1975-08-14
1977-03-29
Peshock, Robert
A61C 900
Patent
active
040140970
ABSTRACT:
A dentistry aid is comprised by a recording system which is concerned with occlusion and related movements of the condyles in the tempero mandibular joints of a patient. Condyle movement, occurring in working the jaws and teeth, is known to be a complicated three-dimensional movement. The recording system of the invention is employed to carry out a method of sensing changes in positional relationship of the condyles with reference to respective maxilla cavities, and determining and recording condyle movements in at least three dimensions. Data obtained by this method constitute a valuable adjunct to the dental profession, particularly in connection with occlusion adjustment.
Included in the recording system of the invention is a pair of cooperating frame structures comprising an upper stationary frame part attachable to the teeth of the upper jaw and a lower movable frame part attachable to the teeth of the lower jaw. Pressure sensing housing units, supported at the extremities of the stationary frame part, include sensing elements yieldably supported thereon. Pressure-transmitting actuator units are supported at the extremities of the lower frame structure in nested relationship with respect to the housing units. Contact elements, adjustably mounted in the actuator units, engage against respective sensing elements to selectively activate the sensing elements in response to three-dimensional condylar movements of the mandible. Gauging means connected to the sensing elements are operable to determine and record, either electrically or mechanically, the extent of condylar movements of the mandible when the jaws and teeth are worked.
REFERENCES:
patent: 2814876 (1957-12-01), Stuart
patent: 3452439 (1969-07-01), Lee
patent: 3614950 (1971-10-01), Rabey
Hamilton Munroe H.
Peshock Robert
Trustees of Boston University
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