Dentistry – Prosthodontics
Patent
1987-09-11
1989-07-11
Silbaugh, Jan H.
Dentistry
Prosthodontics
249 54, 264 18, 425 2, A61C 1300, A61C 1310, B28B 100
Patent
active
048466824
ABSTRACT:
A method of fabricating "adjustment-free" artificial dentures and a jig therefor. A precise jaw model is formed by pouring soft plaster into the concave surface of a precise provisional denture formed by any conventional dental procedure. A plaster block is formed having a recess conforming to the actual shape of the provisional denture. The recess is filled with a synthetic resin compound and then the precise jaw model is moved into the recess to form a plenum defined by the concave surface in the recess and the convex surface of the precise jaw model. During polymerization, any excess synthetic resin compound spilling over from the plenum can escape into a relatively wide clearance between the precise jaw model and the plaster block thus enabling the plenum to retain its original shape. The use of the precise jaw model eliminates the prior art problems associated with a narrow gap inherently formed between the contiguous surfaces of the upper and lower plaster blocks of the conventional flask, into which the curing synthetic resin compound penetrates to disturb the dimensional relationship of the plenum.
REFERENCES:
patent: 2316631 (1943-04-01), Schwartz
patent: 2442847 (1948-06-01), Galley
patent: 2472492 (1949-06-01), Saffer
patent: 2491147 (1949-12-01), Zahn
patent: 2896265 (1959-07-01), Chambers
patent: 2899712 (1959-08-01), Smith
patent: 3217067 (1965-11-01), Tencate
patent: 4115488 (1978-09-01), Colpitts
patent: 4690787 (1987-09-01), Fasnacht
Kutach Karen D.
Silbaugh Jan H.
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