Dentistry – Apparatus – Having absorption means or means to isolate tooth or mouth...
Patent
1998-02-20
1999-05-04
Wilson, John J.
Dentistry
Apparatus
Having absorption means or means to isolate tooth or mouth...
A61C 514
Patent
active
058996940
ABSTRACT:
A loop of cord, projecting out from one end of an elongate sleeve is placed around the base of a tooth and closed. In one preferred form, the cord includes elastic material so that, as the loop is closed around the tooth, the contractile force exerted by the stretched elastic cord around the circumference of the tooth at a part of the tooth which tapers toward the root tends to seat the cord apically (toward the apex of the root). The self-seating tendency of this loop of elastic cord as it is tightened around the base of a tooth more effectively separates the gingival tissues from the base of the tooth. As a result, good clean dry access to the margins of a crown or inlay is provided. In one form, the sleeve is of a heat shrinkable material and is heat shrunk to frictionally engage the cord.
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patent: 5358403 (1994-10-01), Groth
patent: 5480303 (1996-01-01), Groth
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