Effect of Polymerization Shrinkage on Resin Composite Restorations and Effective Countermeasures against it

Shinkai K发现，低光强度固化的复合材料比高光强度固化的复合材料具有更好的腔适应性。Inai N报道，如果树脂复合物的转化度相等，则用各种光照射单元固化的树脂复合物的聚合收缩体积之间没有显著差异。Yoshikawa T报道，慢启动固化方法比常规固化方法显示出更好的边缘密封性和腔壁适应性。Uno S证明了缓慢固化方法的有效性，该方法结合了两次辐照应用之间的间隔，一次低强度，一次高强度。Ikeda T揭示，与平行于棱柱长轴的那些相比，所采用的粘结系统显示出与垂直于棱柱长轴的釉质表面的较低的微拉伸粘结强度。Ikemi T报道， ...更多信息 材料对聚合收缩应力有影响，低粘度树脂的收缩应力低于杂化树脂。宫崎M报道使用高强度光的较短照射时间可能不足以固化光固化树脂复合材料。Kubo S透露，使用低粘度树脂基复合衬垫减轻了由热应力和机械应力产生的粘合剂界面上的聚合收缩应力。Fujitani M透露，由于结构缺陷和热变性层的形成，激光牙本质的亚表层在机械上被削弱，导致树脂粘接系统的粘合性能显着降低。Ishizaki Y和福岛M报道，在用慢启动固化单元、高强度固化单元和常规固化单元固化的复合牙釉质之间，边缘釉质裂纹的发展没有显著差异。Matsui O报道了复合材料恢复应变的程度导致聚合收缩，其按以下顺序增加：用LED灯、卤素灯和氙灯固化。Matsuzawa N开发了一种新设计的测量光固化可流动树脂复合材料聚合线性收缩的方法。Tamura N研究了各种充填技术修复隧道形洞复合体的微渗漏，结果表明，颈部和咬合部分的增量充填显示出最好的边缘密封。少

Shinkai K revealed that composite restorations cured with low light intensities exhibited better cavity adaptation than those cured with high light intensities. Inai N reported that there was no significant differences among the the volume of polymerization shrinkage of the resin composite cured with various light irradiation units, if the degree of conversion of the resin composite was equivalent. Yoshikawa T reported that slow-start curing method showed better marginal sealing and cavity wall adaptation than the conventional curing method. Uno S proved the efficacy of the slow-curing method combined with an interval between the two irradiation applications, one with low intensity and one with high intensity. Ikeda T revealed that the bonding system employed showed lower microtensile bond strength to enamel surfaces that were stressed perpendicular to the prism long axis compared to those stressed parallel to the prism long axis. Ikemi T reported that the elastic modulus of restorativ … More e materials had an effect on polymerization shrinkage stress, and low viscosity resins exhibited lower shrinkage stress than hybrid resin. Miyazaki M reported that shorter irradiation time with the use of high intensity light might not be enough for curing light -cured resin composites. Kubo S revealed that the use of a low-viscosity resin-based composite liner relieved polymerization shrinkage stress on the adhesive interfaces generated by thermal and mechanical stress. Fujitani M revealed that the subsurface layer of lased dentin was mechanically weakened due to the formation of structural defects and a heat-denatured layer, leading to considerably lower adhesive properties of resin bonding systems. Ishizaki Y and Fukushima M reported that there was no significant difference in the development of marginal enamel cracks among the composite restorations cured with a slow-start curing unit, a high intensity curing unit and a conventional curing unit. Matsui O reported that degrees of composite restoration strain led to polymerization shrinkage which increased in the following order ; curing with an LED lamp, halogen lamp and xenon lamp. Matsuzawa N developed a newly designed method for measuring polymerization linear shrinkage of light-cured flowable resin composites. Tamura N investigated the microleakage of tunnel-shaped cavity composite restorations restored by various filling techniques, and the results showed that incremental filling for cervical and occlusal portions exhibited the best marginal sealing. Less