Compositions and method for viscosity-increasable dental composites
AssigneeDENTSPLY SIRONA Inc.
InventorXiaoming Jin
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Abstract
Described is a stable, two-component low viscosity composite that is capable to achieve excellent adaptation to walls/substrates due to its intrinsic flow ability and is also capable of rapid viscosity increasing and being manipulated prior to cure by light upon mixing of such a two-paste composite due to one distinguished reaction promoting partial network formation thus to allow a practitioner further manipulate a firm composite. Upon a completed manipulation by the practitioner, such a mixed material should be readily cured into final solid form by using conventional curing light.
Claims12
A two-component flowable dental composition capable of being cured in a two-stage curing process, said dental composition comprising:
- (a) a base paste comprising a polythiol and a methacrylate, and (b) a catalyst paste comprising a polyene, a methacrylate resin, a photoinitiator and a base catalyst;
- wherein the polyene is selected from the group consisting of tricyclo[5.2.1.02,6]decanedimethanol diacrylate, pentaerythritol tetraacrylate and polyacrylates;
- wherein the base catalyst is capable of promoting thiol-ene Michael-addition at room temperature upon the base paste/catalyst paste mixing in stage one of the two-stage curing process;
- and the photoinitiator is capable of promoting radical addition in stage two of the two stage curing process.
Dependencies are inferred from the claim text.