磷酸浓度对氟斑牙牙釉质微拉伸粘接强度影响的研究

发布时间：2018-05-03 12:12

本文选题：磷酸 + 氟斑牙　；参考：《口腔医学研究》2017年01期

【摘要】：目的:研究不同浓度磷酸酸蚀对氟斑牙釉质微拉伸粘接强度的影响。方法:实验分为4组,对照组30颗正常牙,实验组90颗氟斑牙按照TFI评分分为3组:轻度氟斑牙组、中度氟斑牙组和重度氟斑牙组。每组牙再分为3个亚组,分别采用35%、40%和45%磷酸酸蚀。进行微拉伸粘接强度测试,扫描电镜观察牙釉质粘接界面,光学显微镜观察断裂模式。结果:氟斑牙粘接强度相比对照组降低(P0.05),氟斑牙在不同浓度磷酸酸蚀下粘接强度有显性差异(P0.05),40%酸浓度时粘接强度最大,对照组在45%酸浓度下粘接强度最小。结论:氟斑牙的粘接强度低于正常牙;对于氟斑牙采取不同浓度酸蚀剂会改变其全酸蚀粘接强度,但酸浓度过高反而会导致粘接强度下降。
[Abstract]:Objective: to study the effect of phosphate etching at different concentrations on the microtensile bonding strength of fluorosis enamel. Methods: the experiment was divided into 4 groups, 30 normal teeth in the control group, 90 fluorosis teeth in the experimental group were divided into 3 groups according to TFI score: mild dental fluorosis group, moderate fluorosis tooth group and severe fluorosis tooth group. Each group was subdivided into 3 subgroups, with 35% and 45% phosphate etching, respectively. The bonding strength of enamel was measured by scanning electron microscope (SEM) and the fracture mode of enamel was observed by optical microscope. Results: compared with the control group, the adhesive strength of dental fluorosis was lower than that of the control group (P 0.05). The adhesive strength of fluorosis teeth was the highest when the concentration of P0.05% acid was 40%, and that of the control group was the lowest at the concentration of 45% acid. Conclusion: the adhesive strength of fluorosis teeth is lower than that of normal teeth.
【作者单位】：西南医科大学附属口腔医院修复科;
【基金】：四川省教育厅课题(编号:112B128)
【分类号】：R783.3

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