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

• 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
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12307043/
• 关键词: Resin composite; Polymerization shrinkage; Irradiation method; Contraction stress; Enamel cracks; low-viscosity resin; Contraction gap; Marginal sealing

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揭示了弱光固化复合修复体比强光固化复合修复体表现出更好的腔体适应性。Inai N报道，在树脂复合材料转化程度相同的情况下，不同光照射单元固化的树脂复合材料的聚合收缩体积没有显著差异。Yoshikawa T报道了慢启动固化方法比常规固化方法具有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，并在两个辐照应用之间间隔一段时间，一个低强度和一个高强度。Ikeda T发现，与平行于棱柱长轴受力的釉质表面相比，垂直于棱柱长轴受力的釉质表面的粘接系统显示出较低的微拉伸粘接强度。Ikemi等报道了恢复性材料的弹性模量对聚合收缩应力的影响，低粘度树脂比混杂树脂表现出更低的收缩应力。Miyazaki M报道，使用较短的高强度光照射时间可能不足以固化光固化树脂复合材料。Kubo S揭示了使用低粘度树脂基复合衬垫可以缓解由热应力和机械应力产生的粘合界面聚合收缩应力。Fujitani M揭示了激光牙本质的亚表面层由于结构缺陷和热变性层的形成而机械弱化，导致树脂粘接系统的粘合性能大大降低。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在复合修复体边缘牙釉质裂纹发育上无显著差异。Matsui O报道复合恢复应变的程度导致聚合缩水率依次增大；固化用LED灯、卤素灯和氙气灯。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研究了不同充填方法修复的隧道形腔复合修复体的微渗漏，结果表明，颈部和咬合部分的增量充填表现出最好的边缘密封。少

项目成果

Fujitani M: "Does Er : YAG or CO2 laser ablation of dentin affect the adhesive properties of resin bonding systems?"Excerpta Medica International Congress Series. 1248. 161-166 (2003)

Fujitani M：“Er：YAG 或 CO2 激光烧蚀牙本质会影响树脂粘合系统的粘合性能吗？”Excerpta Medica 国际会议系列。

Kubo S: "The effect of light-curing modes on the microleakage of cervical resin composite restorations"Journal of Dentistry. (in press).

Kubo S：“光固化模式对宫颈树脂复合修复体微渗漏的影响”牙科杂志。

播磨貴裕: "各種レーザー処理された象牙質面に有効な接着システムについて"歯界展望. 増刊号. 312 (2001)

Takahiro Harima：“关于对各种激光处理的牙本质表面有效的粘合剂系统”Dental Perspectives 312 (2001)。

久保至誠: "根面う蝕への対処法"デンタルエコー. 128巻. 16-25 (2002)

久保岛子：“如何处理根部龋齿”Dental Echo Vol. 128. 16-25 (2002)

Kubo S: "Effect of low-viscosity resin-based composite on the microleakage of cervical restorations"American Journal of Dentistry. (in press).

Kubo S：“低粘度树脂基复合材料对宫颈修复体微渗漏的影响”美国牙科杂志。