Dentistry – Method or material for testing – treating – restoring – or... – Crown
Patent
1998-10-23
2000-05-30
Wilson, John J.
Dentistry
Method or material for testing, treating, restoring, or...
Crown
433218, A61C 508
Patent
active
06068481&
ABSTRACT:
A set of fiber-polycarbonate shells for making bicuspid and molar crowns is formed with lingual sidewalls shorter than the facial or buccal sidewalls to facilitate easy fit both gingivally and occlusally. The shells are sized to fit loosely between adjacent teeth and relative to opposed teeth. The shells have windows in the mesio-distal sidewalls and can have a window in the occlusal wall. A new method of forming crowns using such shells provides a good fit to a prepared tooth and relative to adjacent and opposed teeth by filling the shell with a glass-filled acrylic resin filler, biting down on the filled shell to position the shell gingivally and occlusally. Resin filler extrudes through the window to form good proximal contacts and to shape the occlusion, with the shell rocking about the facial gingival margin to a comfortable fit with an opposed tooth. The excess resin filler and shell are easily shaped to form the final crown. The crown, formed by polycarbonate reinforced resin, is durable enough for long-term wear.
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patent: 4778386 (1988-10-01), Spiry
patent: 4795345 (1989-01-01), Ai et al.
patent: 5458489 (1995-10-01), Tennyson
Flexible Dimensions, LLC
Wilson John J.
LandOfFree
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