Ceramic fused fiber enhanced dental materials
AssigneeM.E.D. USA, Inc.
InventorsMark B. Lyles, Ronald G. Ritsco
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Abstract
The preferred embodiment of the present invention provides novel and unique filler compositions and ceramic enhanced dental materials. The preferred embodiment of the filler composition and the ceramic dental restorative material is comprised of about 22% by weight alumina, about 78% by weight silica, about 2% by weight silicon carbide, and about 2.85% by weight boron nitride with less than 1% cristobalite contamination.
Claims21
In a method for the direct filling of a cavity in a tooth, wherein said method includes filling said cavity with an initially liquid, settable filing material comprising a filler and a binder admixed therewith, thereafter permitting said material to harden in situ, the improvement in said method comprising utilizing as the predominant component of said filler, a fused-fibrous matrix compound comprised of:
- from about 1% to about 50% by weight alumina;
- from about 50% to about 98% by weight silica;
- and
- from about 1% to about 5% by weight boron nitride.
A dental restorative composition comprising:
- a binder;
- and
- a fused-fibrous matrix compound filler, said filler comprised of about 1% to about 50% by weight alumina, from about 50% to about 98% by weight silica, and boron.
A method for the filling of a cavity in a tooth comprising:
- (a) filling said cavity with a settable filling material comprising a binder and filler, wherein said filler is a fused-fibrous matrix compound comprising from about 15% to about 30% by weight alumina;
- from about 65% to about 85% by weight silica;
- from about 1% to about 3% by weight silicon carbide, and from about 1% to about 5% by weight boron nitride;
- and
- (b) thereafter allowing said material to harden.
A fused-fibrous matrix compound ceramic dental restorative composition comprising:
- alumina, silica and boron.
A fused-fibrous matrix compound dental restorative composition manufactured from:
- alumina fibers;
- silica fibers;
- and
- a fusion source, whereby said composition has a compressive strength equal to or greater than about 500 MN/m.sup.2.
Dependencies are inferred from the claim text.