唾液污染对粘结剂粘结强度影响的实验研究  

The effect of artificial saliva on bond strengths of three porcelain-dentin bonding cements

作　　者：吴国华[1,2] 吴凤鸣[1] 苏恩典[1] 徐茹霞[1] 

机构地区：[1]南京医科大学口腔医学研究所,江苏南京210029 [2]镇江市第四人民医院口腔科,江苏镇江212001

出　　处：《口腔生物医学》2012年第2期80-83,共4页Oral Biomedicine

基　　金：江苏高校优势学科建设工程资助项目

摘　　要：目的:观察唾液污染对于三种不同粘结剂剪切强度的影响。方法:制备牙本质及铸瓷试件各90个,随机分成3组,分别用三种粘结剂(玻璃离子粘固粉、自粘接复合树脂粘结剂和自酸蚀树脂粘结剂)进行粘结处理,并按牙本质及铸瓷试件预备的粘结面进行粘结。3组各30个试件均设实验组和对照组。实验组24个试件分4个时间点模拟唾液污染,在粘结后即刻、3分钟、6分钟、10分钟浸入人工唾液,对照组(6个)不浸入人工唾液。24h后,用万能测力仪测试各组的剪切强度。结果:各组中通用自粘结复合树脂粘结剂和两步法自酸蚀树脂粘结剂的剪切强度显著高于玻璃离子粘固粉的剪切强度,3种粘结剂即刻组和3分钟组的剪切强度都下降,6分钟组和10分钟组剪切强度差别不明显,接近对照组。结论:唾液污染使3种粘结剂固化早期时的剪切强度均有所下降,其中唾液污染对玻璃离子粘固粉粘结剪切强度影响最大。Objective ： To detect the influences of saliva contamination on the bond strengths of glass ionomer cement （ Ketac, 3 M）, self-adhesive universal resin cement （ RelyX, 3M） and self-etching adhesive systems （ Contax, DMG）. Methods： Artificial saliva was made. Human third molars were collected and 90 test specimens were made and divided into 6 groups according to three different cements and immerged into artificial saliva or not. The microtensile bond strength was measured. Results：In the control and contamination groups, microtensiles of RelyX and Contax cements groups were higher than that of Ketac groups. Microtensiles of 0 min and 3 rain groups reduced more obviously than that of 6 min and 10 min which were not significantly different from control groups. Conclusions： Saliva contamination can influence the bond strengths of three cements in the early period of solidification. Bond strengths of glass ionomer cement reduce more than that of composite resin cement.

关 键 词：人工唾液 冠粘结剂 剪切强度 

分 类 号：R783.1[医药卫生—口腔医学]