Dentistry – Prosthodontics – Denture liner or cushion
Patent
1982-10-01
1984-02-21
Hayes, Lorenzo B.
Dentistry
Prosthodontics
Denture liner or cushion
106 35, 264 17, 433171, 523115, 523120, A61K 608
Patent
active
044327307
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: 2848750 (1958-08-01), Sannecke et al.
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patent: 3888799 (1975-06-01), Rose et al.
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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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