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US 9,315,598 B2Granted
Low stress flowable dental compositions
AssigneeDENTSPLY International Inc.
InventorsXiaoming Jin, Paul D. Hammesfahr
Life of this patent
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Abstract
A photopolymerizable and photocleavable (P&P) resin monomer is derived from a reactive photoresponsible moiety via various linkages to form photopolymerizable monomers and/or oligomers.
Claims7
A method of reducing stress during curing of a polymerizable material having a pre-gel phase and a post-gel phase, the method comprising:
- forming a cross-linked network of the polymerizable material by applying a first energy source, and
- selectively cleaving a portion of the cross-linked network by applying a second energy source thereby inducing a stress-relief period, wherein the selective cleaving results in only a partial degradation of the cross-linked network such that the cross-linked network maintains its structural integrity.
A dental material comprising a photopolymerizable and photocleavable resin, wherein said resin forms a cross-linked network upon application of a first energy source and which has a pre-gel and post-gel phase;
- wherein at least a portion of said cross-linked network is selectively cleavable upon exposure to a second energy source such that the selective cleaving results in only a partial degradation of the cross-linked network such that the cross-linked network maintains its structural integrity.
Dependencies are inferred from the claim text.