Polymerization shrinkage of dental composites remains a major concern. Free-radically polymerizable cyclic monomers can be a conceivable alternative to methacrylates for the development of low-shrinkage composites. Composites based on vinycyclopropanes show good mechanical properties and exhibit significantly lower volumetric shrinkage and shrinkage stress than corresponding dimethacrylate-based materials. The results indicate that such monomers are promising candidates for the replacement of commonly used low viscosity dimethacrylates such as triethylene glycol dimethacrylate in dental composites. [1,2]

[1] Y. Catel, P. Fässler, U. Fischer, C. Gorsche, S. Schörpf, S. Tauscher, R. Liska, N. Moszner: "Evaluation of Difunctional Vinylcyclopropanes as Reactive Diluents for the Development of Low-Shrinkage Composites"; Macromolecular Materials and Engineering, 302 (2017), 4; S. 1700021 - 1700031.

[2] Y. Catel, P. Fässler, U. Fischer, C. Gorsche, R. Liska, S. Schörpf, S. Tauscher, N. Moszner: "Synthesis and polymerization of vinylcyclopropanes bearing urethane groups for the development of low-shrinkage composites"; European Polymer Journal, 98 (2018), 98; S. 439 - 447.