Plastic and nonmetallic article shaping or treating: processes – Dental shaping type – Tooth forming
Patent
1989-05-12
1990-11-13
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Dental shaping type
Tooth forming
51322, 264139, 4332031, A61C 1320, A61C 1309, B32B 3118
Patent
active
049700324
ABSTRACT:
A method for the manufacture of artificial teeth, either replacement whole teeth or crowns, whereby a tooth is produced by machining from a layered block of synthetic plastics materials, the layers being of predetermined varying color (hue), chroma, value and translucency to simulate the pulp, dentine and enamel layers in a real tooth, thereby providing an artificial tooth with the distribution and depth of color of a real tooth. The process provides for varying the tooth color by milling the tooth from a different section of the layered block to vary the thicknesses of the layers, at least at the labial, mesial, distal and occlusal surfaces, so as to obtain a custom tooth matched very closely to a patient's real tooth color and pattern. The process permits the manufacture of an artificial tooth from materials with a hardness closely matching that of a real tooth to provide similar wear properties.
REFERENCES:
patent: 2514076 (1950-07-01), Kelly
patent: 3126429 (1964-03-01), Saffir
patent: 3423829 (1969-01-01), Halpern
patent: 4433959 (1984-02-01), Faunce
Fiorilla Christopher A.
Silbaugh Jan H.
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