Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1983-12-08
1985-09-24
Hayes, Lorenzo B.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
106 35, 4331681, A61K 608
Patent
active
045433798
ABSTRACT:
The invention provides a denture liner composition for a composite denture based on a phosphonitrilic fluoroelastomer (poly(fluoroalkoxy)phosphazene) curable at atmospheric pressure at temperatures of 100.degree. C. or less, conveniently by immersing the packed denture flask in a water bath at the appropriate temperature. The composition includes filler materials for increasing the hardness of the cured liner, interpenetrating polymers for increasing firmness and bond strength, and cross-linking agents for increasing the tensile strength and bond strength of the cured liner. The composite denture is preferably prepared in a one-step process wherein the liner composition material of a single firmness is cured in situ with the denture base material. Alternatively, a firm liner material may be cured at the periphery of the denture and a softer liner material cured at the center, in order to provide a firm elastic liner where adjustments must be made by grinding and where the patient's soft tissues must be displaced, and a soft elastic liner over the bony anatomy of the patient where stresses from chewing are most concentrated and the soft tissues are thin.
REFERENCES:
patent: 3702833 (1972-11-01), Rose et al.
patent: 3888799 (1975-06-01), Rose et al.
patent: 3945966 (1976-03-01), Vicic et al.
patent: 4251215 (1981-02-01), May et al.
patent: 4433958 (1984-02-01), Fellman et al.
Farris Charles L.
Gettleman Lawrence
LeBouef, Jr. Ralph J.
Rawls H. Ralph
Buttmi Jean A.
Gulf South Research Institute
Hayes Lorenzo B.
Hoffman Martin P.
Wasson Mitchell B.
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