Dentistry – Method or material for testing – treating – restoring – or...
Patent
1987-06-22
1989-01-03
Scott, Samuel
Dentistry
Method or material for testing, treating, restoring, or...
433 75, 433141, 33169B, 33573, A61C 500
Patent
active
047953462
ABSTRACT:
In the visual measurement system for reading the occulusal clearance between the pulpal cavity wall and the opposing tooth, a thermoplastic material for occulusal registration is cast in a pulpal cavity wall at the time of the primary preparation of a cavity or abutment, and is put into occulusal closure engagement with the opposing tooth to register the opposing tooth surface thereon, the material being capable of being softened and formed at a temperature slightly higher than the internal temperature of the oral cavity and being of slight transparency. A specially designed explorer for thickness mesurement is then inserted into the required regions on the prepared surface covered with the material, thereby to produce indentations which are of various sizes and shapes similar to those of the head of the explorer, and which has its width coincident with the indented depth, and the sizes of the indentations are visually observed to read the clearance between the pulpal cavity wall and the opposing tooth.
REFERENCES:
patent: 3935640 (1976-02-01), Cohan
patent: 4275672 (1981-06-01), Clad
patent: 4552531 (1985-11-01), Martin
patent: 4677756 (1987-07-01), Simon et al.
G-C Dental Industrial Corp.
Kamen Noah
Scott Samuel
Takatsu Toshio
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