Dental composition, kit of parts and use thereof

Abstract

The application relates to a dental composition comprising a) a compound (A) with the following features: only one backbone unit (U) with 6 to 20 carbon atoms, at least 6 carbon atoms thereof forming an aromatic or an aliphatic cyclic moiety, the remaining carbon atoms either being part of substituents pending from the cyclic moiety or being part of bridging groups to spacer units, wherein one or more of the remaining carbon atoms can be replaced by an oxygen atom, the backbone unit not comprising a bisphenol structure and halogen atoms, one or two unit(s) (S) being connected to the backbone unit (U) via an ether linkage, at least one unit (S) comprising a - CH2 - CH2 - CH2 - CH2 - O - CH2 - CH (Q) - OG moiety or a CH2-CH(OG) -CH2-OM moiety or a mixture of these two types of moieties within one unit (S), with G comprising at least one polymerizable moiety and an urethane moiety, the urethane moiety acting as connecting element to unit(s) (S), and M comprising at least one group selected from acroyl, methacroyl, aryl, mixtures and combinations thereof, Q comprising at least one group selected from hydrogen, methyl, phenyl, phenoxymethyl, mixtures and combinations thereof, and with the proviso that onto the backbone unit (U) at least two substituents are attached, each bearing at least one group G, wherein in the case where only one unit (S) is present, the group G not being part of said unit (S) is located in the further substituent pending from unit (U), b) a filler (B) and c) an initiator (C).

Description

technical field [0001] The present invention relates to compositions comprising a hardenable compound comprising a relatively rigid backbone unit, a spacer unit and a unit comprising a polymerizable end group linked to the spacer unit via a carbamate moiety. [0002] The present composition is useful in the field of dentistry, and especially for providing so-called low stress composite filling materials. Background technique [0003] Volume shrinkage of curable compositions during the curing process has long been known. In particular, in the field of dentistry, this can cause problems, such as the possible formation of gaps between the curing composition and the tooth cavity walls. Can lead to infection of the remaining tooth structure. Various efforts have been made to solve this problem. [0004] US 2009 / 0036565 relates to TCD (i.e. tricyclic [5.2.1.0 2，6 ] Dental composites of decane-3 / 4,8 / 9-diyl) derived monomers wherein the flexural strength / shrink tension quotient ...

AI Technical Summary

Problems solved by technology

In particular, in the field of dentistry, this can cause problems, such as the possible formation of gaps between the curing composition and the tooth cavity walls

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