Reduction of the shrinkage force of tooth fillings
AssigneeHeraeus Kulzer GmbH
InventorsAndreas Grundler, Marcus Hoffmann
Life of this patent
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Abstract
A self-curing or dual-curing, low viscosity composite is used for the fabrication of a dental liner capable of polymerization in 2 stages with 2 curing times and delayed polymerization characteristics that is designed for use at the cavity wall in the form of a thin layer.
Claims2
A method for compensating for the shrinkage forces produced by a dental filling during polymerization, which comprises applying a liner to the walls of a cavity to be filled by said dental filling, prior to placing said dental filling in said cavity, said liner being formed of a dual-curing, low viscosity composite containing polymerizable monomer(s), crosslinker, initiator and light-impervious components selected from the group consisting of fillers and pigments, and being capable of polymerization in two stages, said two stages being a first stage, in which the surface of said liner is cured, to a depth of <1 mm by light curing with gelation, and a simultaneous and/or subsequent second stage, in which the remainder of said liner is completely cured by thermal or redox-induced self-curing, the first stage having a curing time of 2 to 10 minutes and the second stage having a curing time of 1 to 3 hours.
Dependencies are inferred from the claim text.