Photocurable epoxy–polyol matrices for use in dental composites I

Influence of light-curing units on the polymerization of low-shrinkage composite resins

“…The shrinkage of LS ranged 7.5-8.8 μm. As claimed, such low shrinkage was achieved by the ring-opening system of oxirane molecules despite the lowest filler content among the specimens examined 18,19) . From the result, a further decrease in polymerization shrinkage from the most nanofiller-containing composite resins seems not simple because the filler content of most nanofillercontaining composite resins is so high that there is less available margin for increasing the filler content.…”

“…Siloxane imparts high hydrophobicity to the silorane, so siloranes have lower water sorption and solubility than conventional methacrylate-based composites 17) . Oxiranes have lower polymerization shrinkage and higher strength through a cationic ring-opening mechanism 18,19) . The key advantages of the two components (siloxane and oxirane) may impart many favorable properties to silorane.…”

Comparative Evaluation of Inter Surface Gap of Three Composite Restorative Materials-Sem Analysis

“…It also exhibit a low thermal expansion coefficient of 49.8m/mc which is lesser than the methacrylate based composites 51.2/mc. The polymerization shrinkage of the epoxy based dental restorative resins is 2-3% less compared to the traditional system 5 . The good adhesion properties of epoxy resins would be expected to minimize microleakage 6 .…”

Diş hekimliğinde kullanılan kompozit rezinlerin güçlendirilmesi

“…Kompozit rezinlerin mekanik özelliklerini geliştir-mek amacıyla epoksi polyol, silseskuoksan (SSQ), epoksi rezin ERL4221 gibi farklı monomerler de kullanı-labilir. [43][44][45] Epoksi polyol ve SSQ polimerizasyon büzülmesini azaltır. 44,45 Epoksi rezin ERL4221 içeren kompozitlerin polimerizasyon büzülmesi geleneksel kompozitlerin ¼'i kadardır.…”

“…[43][44][45] Epoksi polyol ve SSQ polimerizasyon büzülmesini azaltır. 44,45 Epoksi rezin ERL4221 içeren kompozitlerin polimerizasyon büzülmesi geleneksel kompozitlerin ¼'i kadardır. Ayrıca rezin ve doldurucu arasındaki bağlan-tının iyi olması dayanıklı rezin üretimini sağlar.…”