Plastic and nonmetallic article shaping or treating: processes – Dental shaping type
Patent
1994-05-31
1996-04-16
Fiorilla, Christopher A.
Plastic and nonmetallic article shaping or treating: processes
Dental shaping type
264234, 264313, 2643282, A61C 1300
Patent
active
055079814
ABSTRACT:
A process for the formation of dental restorations from glass-ceramic materials and the resulting dental restorations. In this invention, a dental restoration is prepared by placing a glass-ceramic material in a heat-pressure deformable crucible. Heat is then applied to the crucible in order to bring the glass-ceramic material to a working range at temperatures above its liquidus temperature. The crucible in which the glass-ceramic material is placed has heat-pressure deformation properties which are matched to the working temperature of the glass-ceramic material being heated. The heat deformation properties of the crucible must be such that when the glass-ceramic material in the crucible is in the working range the crucible is heat-pressure deformable without rupturing. Once the glass-ceramic material is heated to its working temperature, the crucible is brought into contact with a mold having a preformed cavity therein, the cavity being in the shape of the desired dental restoration. As the distance between the heated glass-ceramic material and the mold is decreased, the crucible is deformed to form a seal with the mold thereby facilitating the injection of the molten glass-ceramic material into the mold cavity. An interactive seal between the crucible and the mold may be provided for. The composite process may be carried out in a vacuum. The resulting dental restoration has superior optical esthetic and strength properties. The invention further includes the heat-pressure deformable crucible which is useful in the process of this invention and the related apparatus.
REFERENCES:
patent: 2196258 (1940-04-01), Erdle
patent: 3006775 (1961-10-01), Chen
patent: 3170805 (1961-02-01), McMillan
patent: 3231456 (1963-01-01), McMillan
patent: 3236610 (1966-02-01), McMillan et al.
patent: 3238085 (1966-03-01), Hayami
patent: 3460987 (1969-08-01), McMillan et al.
patent: 3804608 (1974-04-01), Gaskell
patent: 3977857 (1976-08-01), Mattox
patent: 4189325 (1980-02-01), Barrett
patent: 4265669 (1981-05-01), Starling et al.
patent: 4414282 (1983-11-01), McColleter
patent: 4431420 (1984-02-01), Adair
patent: 4478641 (1984-10-01), Adair
patent: 4480044 (1984-10-01), McAlinn
patent: 4515634 (1985-05-01), Jenn-Ming
patent: 4585417 (1986-04-01), Sozif
patent: 4672152 (1987-06-01), Shinohara et al.
patent: 4747876 (1988-05-01), Hakamatsuka et al.
patent: 4789649 (1988-12-01), Abert
patent: 4913860 (1990-04-01), Makaji et al.
patent: 5134096 (1992-07-01), Marazzi
patent: 5219799 (1993-06-01), Beall
patent: 5246889 (1993-09-01), Kasuga
The Fascination of the Exceptional IPS Empress-Advertisement.
Ivoclar. Vivadent Report Sep. 1990.
Processing a Dental Ceramic by Casting Methods, Grossman.
Hot Compressed Procelain Process For Ceramo-Metal Resturation.
Bahr Donald R.
Fiorilla Christopher A.
Tel Ventures, Inc.
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