Ivoclar Vivadent Ag

Sven Tauscher

Norbert Moszner

Urs Karl Fischer

Yohann Catel

Karin Vogel

Vinylcyclopropane of general formulae I in which X, Y in each case are O or NH, wherein X and Y cannot have the same meaning, Ris a linear or branched C-C-alkyl radical, which can be interrupted by O, S, an ester group or a urethane group, Ris a linear or branched C-C-alkylene radical, which can be interrupted by O, S, an ester group or a urethane group, Ris a hydrocarbon radical with 1 to 20 carbon atoms, which additionally can contain one or more N, O or S atoms, and n is 1, 2, 3 or 4, preferably 1 or 2. The vinylcyclopropanes are characterized by a low shrinkage and a high reactivity on radical polymerization and are suitable in particular for the preparation of dental materials.

Dental materials based on urethane-group-containing vinylcyclopropane derivatives

Radically polymerizable dental material which contains (a) at least one polyfunctional radically polymerizable monomer, (b) at least one further radically polymerizable monomer which can be monofunctional or polyfunctional, (c) at least one photoinitiator for the radical polymerization and (d) at least one filler. The material is characterized in that the mixture of the monomers (a) and (b) has a refractive index of from 1.50 to 1.70 and in that the refractive index of the monomer mixture before the curing corresponds to the refractive index of the filler used or is higher by up to 0.013 and after the curing is higher than the refractive index of the filler by at least 0.02.

Light-curing dental composites with increasing opacity

Dental material which contains at least one vinylcyclopropane of the general formulae I, in which A, B independently of each other are in each case OH or COOH; X, Y independently of each other are in each case O or NH; R, Rindependently of each other are in each case H or an aliphatic linear or branched C-Chydrocarbon radical which can be interrupted by O, S or an ester group; and n, m independently of each other are in each case 0, 1 or 2, wherein, if X&#x2550;Y&#x2550;O, R&#x2260;H and R&#x2260;H, n+m&#x2265;1. The vinylcyclopropanes are characterized by a low shrinkage and a high reactivity on radical polymerization and are suitable in particular for the preparation of dental materials.

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Knonau, Switzerland

Sven Tauscher