唾液污染后牙本质表面不同处理方法对牙本质剪切强度影响的研究  

Effect of Different Treatments with Dentin Surface after Salivary Contamination on Shear Bond Strength

作　　者：孙景杨[1] 郭良微[1] 刘宝峰[2] 徐经伟[2] 

机构地区：[1]哈尔滨医科大学口腔医学院牙周病科,黑龙江哈尔滨150001 [2]中国科学院长春应用化学研究所

出　　处：《口腔医学研究》2013年第6期535-537,共3页Journal of Oral Science Research

基　　金：黑龙江省自然科学基金(编号:D200831);哈尔滨市科技创新人才研究多项资金项目资助(编号:2007RFQS080)

摘　　要：目的:研究唾液污染后牙本质表面不同处理方法对牙本质剪切强度的影响。方法:50颗人无龋第三恒磨牙垂直于牙体长轴切除冠部釉质,暴露牙本质中层,随机分为5组,每组10颗牙齿。其中一组酸蚀后无唾液污染为对照组(A组),其余4组磷酸酸蚀后经唾液污染分别进行完全吹干(B组)、水冲洗(C组)、水冲洗后再酸蚀15s(D组)、水冲洗后再酸蚀30s(E组),37℃水浴24h后测试其剪切强度。结果:A组、C组、D组、E组剪切强度明显高于B组(P<0.05),且A组、C组、D组、E组间剪切强度无显著性差异。结论:在牙本质修复过程中,唾液污染后,通过水冲洗,水冲洗后再酸蚀15s,水冲洗后再酸蚀30s均可得到较高的粘结强度。Objective： To evaluate the shear bond strength through different treatments on the dentin surface after salivary contamination. Methods： The enamel of occlusal surface of 50 third molars without caries extracted freshly was removed perpendicular to the long axis. The medial dentin was exposed to air. Then, 50 teeth were randomly divided into five groups, including the control group （A group： uncontaminated） and other four groups （B group： salivary contamination, completely dried; C group： salivary contamination, washed; D group： salivary contamina- tion, washed, re--etching for 15s and E group： salivary contamination, wash, re--etching for 30s）. Then, all specimens were placed into 37℃ distilled water. After 24 hours, the shear bond strength of each group was tested. Results： A , C , D and E groups show much higher shear bond strength than B group （P〈0.05）. The shear bond strength of A , C , D and E groups showed no significant difference. Conclusion： The washed group and Re--ecthed groups all obtain high recovery bond strength.

关 键 词：牙本质粘结剂 唾液污染 剪切强度 

分 类 号：R783.1[医药卫生—口腔医学]