摘要
目的:评价不同的银汞粘接剂应用于粘接银汞修复时,修复后牙体的抗折力差异。方法:选50个健康的上颌前磨牙,除10个作空白对照外,其余40颗在面制备近远中邻洞,分为4组(直接银汞充填组;树脂加强型玻璃离子水门汀组;玻璃离子水门汀组;树脂型银汞粘接剂组)。样品37℃水浴72 h,5℃到55℃水浴循环2 500次,然后用振动动态测试系统进行抗折实验,直至破裂,记录时间。结果:对照组在5组中显示出最高的抗折力,用ANOVA和t检验显示其与各组间均有显著差异;树脂加强型玻璃离子组较其他实验组有更高的牙齿抗折力。结论:粘接银汞修复是一项有效的技术,用树脂加强型玻璃离子作粘接剂能更有效地提高牙体的抗折力,值得在临床推广应用。
Objective：To evaluate the effects of resistance of bonded amalgam restorations to fracture after treatment. Methods： Fifty healthy extracted maxillary teeth were selected, ten of them as control. The remainder were prepared a mesial occlusal distal （MOD） cavity. All of the teeth were then divided into five groups： 1 st group： control; 2nd group： direct restoration; 3rd group： Luting; 4th group： GC Fuji Ⅱ ; 5th group： RelyX ARC. All specimens were placed in a 37 degree centigrade humidity chamber for 72 h. The samples were thermocycled for 2 500 cycles at a temperature of 5 ℃ and 55 ℃. The samples use fatigue testing and observe by scanning electron microscope. Results ：The preparation and restoration groups required significantly less force to fracture than the control group. The group with glass-ionomer cement bonding and composite resin bonding showed no significantly fracture resistance. Conclusion：Bonded amalgam restoration is a effective technique. At the same time glass-ionomer cement bonding and composite resin bonding shows no significantly fracture resistance.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2008年第5期706-709,共4页
Journal of Practical Stomatology
基金
南京市卫生局基金项目(编号:YKK06110)
关键词
粘接银汞
牙体抗折力
前磨牙
Bonded amalgam
Premolar
Tooth fracture resistance
