Dentistry – Apparatus – Work support
Patent
1981-05-04
1982-12-28
Mancene, Gene
Dentistry
Apparatus
Work support
433 54, 434264, A61C 1100
Patent
active
043659551
ABSTRACT:
A dental articulator in which maxillary and mandibular frames have at opposite sides interengaged condylar elements to simulate the jaw movements of a dental patient whose maxillary and mandibular dental casts are mounted on the respective frames. The mandibular frame has condylar spheres slidably engaged between upper and lower parallel side walls of grooves in condylar guide elements angularly adjustable on opposite sides of the maxillary frame, the upper side walls of the grooves being transparent for visual observation of the orbital and rotational movements of the condylar spheres in the grooves during relative movements of the frames to simulate the jaw movements of the dental patient. The bottom walls of the grooves in the condylar guide elements are spaced axially inwardly of the surfaces of the respective spheres to determine the maximum side shift of the maxillary frame with respect to the mandibular frame and adjusting screws extending through the respective spheres are adjustable toward and away from the bottom walls of the respective grooves to adjust the side shift to a desired value between zero and maximum. The lower side wall of each groove has therein a rotatably adjustable chordwise disposed cam to engage the respective spheres to determine the lateral shift of the rotating condylar sphere. The dental articulator is further characterized in the provision of a simple bracket pivotally mounted on the maxillary frame and including a single screw engaged with the maxillary frame to lock the frames for centric jaw opening and closing movements about a hinge axis coinciding with the axis of the condylar spheres.
REFERENCES:
patent: 1586739 (1926-06-01), Hanau
patent: 2119896 (1938-06-01), Van Dorn et al.
patent: 3048923 (1962-08-01), Franwick
patent: 3159915 (1964-12-01), Beu et al.
patent: 3330039 (1967-07-01), Brandhandler et al.
patent: 3616537 (1971-11-01), Shuchard
patent: 3624906 (1971-12-01), Granger
patent: 3897632 (1975-08-01), Beu
patent: 4305708 (1981-12-01), Beu
Mancene Gene
Wilson John J.
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