Fracture toughness comparison of five indirect resin composites after the function of thermal cyclin

• 作 者: TingtingWu;XueqiGan;HaiyangYu;
• 机 构: State Key Laboratory of Oral Diseases,West China Hospital of Stomatology,Sichuan University,Chengdu,
• 出 处: 2014国际口腔生物材料及组织再生论坛
• 发表日期: 2014年期

　　This study investigated fracture toughness values of five dental indirect resin composites under the effect of thermal cycling by single-edge notched beam method.Five commercial dental restorative resins were included in the research.AP-X(micro-hybrid resin composite),FiltekP60(micro-hybrid resin composite with zirconia particles),Z350(micro-filled resin composite with zirconia particles),VITA ZETA(nano-filled composite),VITA LC(nano-filled composite).After thermal cycling,significant changes of fracture toughness were found for the tested composites except AP-X.Micro-differences between SEM images with and without thermal cycling were observed.It is concluded that irregular-shaped fillers and higher filler content contribute to higher mechanical properties,and result in superior fracture toughness under the effect of thermal cycling.