摘要
目的检验三种银汞黏接剂应用于粘接银汞修复时,其抗微渗漏的能力,寻找一种简单有效的黏接材料。方法选28颗新鲜前磨牙,在其近中及远中邻面制备边长分别是2 mm和4 mm的长方形,使其龈壁位于牙本质-牙骨质界,壁位于牙釉质。28颗前磨牙按黏接材料的不同分为4组:空白对照组,树脂加强玻璃离子水门汀组,玻璃离子水门汀组,树脂型银汞黏接剂组。充填后,37℃水浴7 d,然后浸入亚甲蓝染色液中,37℃恒温染色48 h,统计其微渗漏结果。结果非参数统计显示实验组微渗漏小(P<0.01),树脂加强型玻璃离子组无微渗漏,与其他组有着显著差异(P<0.05),釉质侧的渗漏低于牙本质-牙骨质侧。结论粘接银汞修复是一项有效的技术,并且用树脂加强型玻璃离子作黏接剂有着更有效的防微渗漏效果,值得在临床推广应用。
Objective To verify the abilities of different adhesive materials to prevent microleakage in bonded amalgam restorations. Methods Standard cavities were prepared in both mesial proximal surfaces and distal proximal surfaces of 28 premolars. The gingival wall was lo- cated in cementum/dentin and the occlusal wall in enamel. Teeth were divided into 4 groups, according to the material employed. Following restoration, the teeth were submitted to the 37℃ water for 7 days. The teeth were subsequently immersed in methylene blue dye and sectioned to allow assessment of microleakage. Results Non-parametric statistical analysis indicated that all materials demonstrated less leakage than the control group （ P 〈 0.01 ）. No leakage was found using the resin - modified glass-ionomer cement, which was significantly different from the other adhesive materials （ P 〈 0.05）. Leakage in enamel was lower than in cementanfdentin margins. Conclusion It was concluded that bonded amalgam was an effective technique. And the resin-modified glass-ionomer cement was better than other groups.
出处
《口腔医学》
CAS
2007年第9期477-478,488,共3页
Stomatology
关键词
粘接银汞
微渗漏
前磨牙
bonded amalgam
microleakage
premolar
