Patent
1975-03-14
1977-09-06
Peshock, Robert
A22C 700
Patent
active
040458725
ABSTRACT:
An analog module for use with a dental articulator is formed as a unitary structure having a pair of laterally spaced simulated fossae. The module is formed with reference openings in the undersides of the fossae, and it is then placed in a reconverter machine where the reference openings are enlarged to represent the three-dimensional jaw movement characteristic measured from a particular patient. Thereafter the module is attached to the upper frame of an Arkon type articulator where the enlarged openings reproduce the jaw movement pattern of the patient.
The module is provided with a fixed three-dimensional reference for establishing a predetermined reference position when it is placed in the articulator, and establishing the same reference position when it is previously placed in the reconverter machine. The module also has hinge axis alignment means engagable by pointers of a transfer face bow for aligning dental casts in the articulator.
The method of reconverting jaw movement information is characterized by the fact that the two fossae simulating the socket portions of the temporomandibular joints are at all times in the process treated as parts of an integral unit; i.e., the upper jaw structure is simulated as a unit both with regard to three-dimensional position referencing, inserting the dynamic movement information, and replaying the dynamic information.
The reconversion method is further characterized by the fact that any error or discrepancy between the three-dimensional reference position information of the patient and that of the analog module is compensated for at the input side of the reconverter.
REFERENCES:
patent: 3048923 (1962-08-01), Franwick
patent: 3206852 (1965-09-01), Swanson
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