摘要
目的:采用微拉伸试验比较EDTA(Ethylene Diamine Tetraacetie Acid,乙二胺四乙酸)预处理硬化牙本质前后的离体牙树脂粘结强度。方法:选择24颗具有典型楔状缺损的离体牙,12颗离体牙的楔状缺损处为Ⅲ级以上硬化牙本质,其余12颗为正常牙本质。以平分楔状缺损为标准对离体牙进行纵剖,随机分为硬化牙本质对照组A与实验组B;正常牙本质对照组C与实验组D。实验组均使用EDTA(Glyde File Prep EDTA)预处理牙本质表面,再行自酸蚀树脂粘结。测定4组样本的微拉伸粘结强度。结果:微拉伸实验显示测得A、B、C、D,4组样本的微拉伸强度分别为(9.49±2.23)MPa、(10.50±2.16)MPa、(10.89±4.76)MPa、(10.99±5.21)MPa。实验组B的粘结强度显著高于对照组A,有统计学意义(P<0.05);而实验组D的粘结强度略高于对照组C,但无统计学意义。结论:利用EDTA预处理能提高硬化牙本质的自酸蚀树脂粘结强度,但对正常牙本质无明显作用。
Objective：To evaluate the micro-tensile bond strength（μTBS）of adhesives to sclerotic dentin in non-carious cervical lesions pretreated with EDTA（Ethylene Diamine Tetraacetie Acid）.Methods：The anterior teeth and premolars with non-carious typical cervical lesions which extracted for periodontitis were collected.The cervical lesions of 12 teeth were sound dentin,and the other 12 were of scale Ⅲ sclerotic dentin.All the teeth were cut into two parts longitudinal to the cervical lesions and then were randomized into 4groups respectively：Group A（control group of sclerotic dentin）,Group B（test group of sclerotic dentin）,Group C（control group of sound dentin）and Group D（test group of sound dentin）.The surfaces of cervical lesions in Group B and D were pretreated by EDTA.Then the cervical lesions were resin-restored with a self-etching adhesive.μTBS of four groups were measured.Rusults：μTBS of group A,B,C,D was 9.49±2.23Mpa,0.50±2.16Mpa,0.89±4.76Mpa and 10.99 ±5.21Mpa.The mean bond strength of group B was significantly higher than group A.There were no statistics differences between group C and D.Conclusion：The bond strength of sclerotic dentin is effectively enhanced by pretreated with EDTA before self-etching adhesive,but it doesn’t work in sound dentin.
出处
《口腔医学研究》
CAS
CSCD
2012年第6期576-579,共4页
Journal of Oral Science Research
基金
上海市科学技术委员会基金资助项目(编号:10JC1408800)
