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

Shinkai K研究表明，低光固化的复合修复体比高光固化的复合修复体具有更好的洞腔适应性。INAI N报道，如果树脂复合材料的转化率相等，则不同光照单位固化的树脂复合材料的聚合收缩体积没有显著差异。Yoshikawa T报道，慢启动固化方法比传统固化方法具有更好的边缘密封性和空洞壁适应性。S证明了慢固化方法的有效性，并在两次照射之间进行了间隔，一次是低强度的，一次是高强度的。Ikeda T透露，与平行于棱柱长轴的应力相比，所使用的粘结系统对垂直于棱柱长轴的釉质表面显示出较低的微拉伸粘结强度。Ikemi T报道了修复体…的弹性模量更多的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。Miyazaki M报告说，在使用高强度光的情况下，较短的照射时间可能不足以固化光固化树脂复合材料。久保S透露，低粘度树脂基复合衬垫的使用缓解了由于热应力和机械应力在胶粘剂界面上产生的聚合收缩应力。Fujitani M揭示，由于结构缺陷和热变性层的形成，激光牙本质的亚表层被机械地削弱，导致树脂粘结系统的粘接性能显著降低。Ishizaki Y和Fukushima M报道，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修复体在釉质边缘裂纹的发展方面没有显著差异。Matsui O报告说，复合修复应变的程度导致聚合收缩，收缩按以下顺序增加：用LED灯、卤素灯和氙灯固化。Matsuzawa N开发了一种新设计的方法，用于测量光固化流动树脂复合材料的聚合线收缩。Tamura N研究了不同充填方法修复的隧道形洞洞复合体的微渗漏情况，结果表明，颈部和咬合部的渐进式充填具有最好的边缘密封性。较少

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