Dentistry – Method or material for testing – treating – restoring – or... – Crown
Patent
1988-09-06
1990-08-28
Wilson, John J.
Dentistry
Method or material for testing, treating, restoring, or...
Crown
433 53, 433 74, 433213, 433214, A61C 510
Patent
active
049521519
ABSTRACT:
An apparatus for use in preparing both metal and porcelain dental crowns. The apparatus has a plurality of upright supports and arms coupled therewith that are moved to contact with the tooth opposing the tooth to be crowned in the proper occlusal locations such that when the permanent crown is prepared it has all of the proper occlusal characteristics of the opposing dental structure. The apparatus is intended for use in and with a replica of the patient's dental structures. The apparatus has a plurality of pathways upon which the upright supports may be moved so as to position the supports in the proper contact points. Methods for utilizing the apparatus when preparing metal and porcelain crowns are also provided. A preformed, imitation dental crown having four layers for use in preparing porcelain crowns where each layer corresponds to one of the layers of porcelain or metal necessary to prepare the finished porcelain crown is also provided.
REFERENCES:
patent: 1675732 (1928-07-01), Schweitzer
patent: 1950865 (1934-03-01), Stansbury
patent: 3375582 (1968-04-01), Myerson
patent: 3417471 (1968-12-01), Mitchell
patent: 4017972 (1977-04-01), Glenn
patent: 4521187 (1985-06-01), Casper
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