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

聚合收缩对树脂复合材料修复体的影响及有效对策

基本信息

批准号：
12307043
负责人：
SHINKAI Koichi
金额：
$ 21.33万
依托单位：
The Nippon Dental University (2001-2002)Tokyo Medical and Dental University (2000)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

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

Shinkai K 透露，低光强度固化的复合修复体比高光强度固化的复合修复体表现出更好的空洞适应性。 Inai N 报道，如果使用不同的光照射单元固化，则树脂复合材料的聚合收缩体积没有显着差异。 Yoshikawa T 报道，慢速固化方法比传统固化方法表现出更好的边缘密封性和空腔壁适应性，证明了慢速固化方法的功效。结合两种照射应用之间的间隔（一种是低强度，一种是高强度）的方法表明，与那些受力的牙釉质表面相比，所采用的粘合系统在垂直于棱镜长轴的应力下表现出较低的微拉伸粘合强度。平行于棱柱长轴的 Ikemi T 报道称，恢复材料的弹性模量对聚合收缩应力有影响，低粘度树脂比杂化树脂表现出更低的收缩应力。 Miyazaki M 报道称，使用高强度光来缩短照射时间可能不足以固化光固化树脂复合材料，Kubo S 则揭示了使用低粘度树脂基复合材料衬垫可以缓解粘合界面上的聚合收缩应力。 Fujitani M 揭示，由于结构缺陷和热变性层的形成，激光牙本质的表面下层被机械削弱，导致粘合性能显着降低。 Ishizaki Y 和 Fukushima M 报道称，使用慢启动固化装置、高强度固化装置和传统固化装置固化的复合修复体的边缘牙釉质裂纹的发展没有显着差异。 Matsuzawa N 开发了一种新设计的测量聚合线性的方法，复合材料恢复应变的程度导致聚合收缩按以下顺序增加： Tamura N研究了不同填充技术修复的隧道状空洞复合材料修复体的微渗漏，结果表明，增量填充对颈部和咬合部分表现出最佳的边缘密封效果。