Dentistry – Apparatus – Work support
Patent
1995-08-04
1997-02-25
Lucchesi, Nicholas D.
Dentistry
Apparatus
Work support
433 54, 433 58, A61C 1100
Patent
active
056054564
ABSTRACT:
A dental articulator comprises-a maxillary clamp, a clamp support, a mandibular clamp and a mandibular clamp detent. The clamp support includes a first post defining a first set of engagement sites, a second post defining a second set of engagement sites, and a hinge pivotally supposing the maxillary clamp. The mandibular clamp detent engages with corresponding engagement sites of the first and second sets of engagement sites to position the mandibular clamp relative to the maxillary clamp. In preferred form, the mandibular and maxillary clamps each include a collet for embracing a first dental model and a cam threadedly engaging the collet for tightening the collet around such a dental model. In an especially preferred form, the collet includes a flexible band defining periodic apertures along a length of the band and the cam defines a thread engaging a potion of the periodic apertures to loosen or tighten the collet. In another especially preferred embodiment of the dental articulator, the engagement sites on the clamp support are defined by sockets on facing sides of the first and second posts. The mandibular clamp detent includes a sleeve coupled to the mandibular clamp, a spring positioned in the sleeve, a pair of threaded pins relatively biased by the spring and projecting out of the sleeve in different directions for engagement with corresponding sockets on the posts, and a pair of nuts each threadedly engaged with one of the pins for abutment against the sleeve.
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