摘要
目的:比较不同酸蚀浓度下光固化树脂加强型玻璃离子水门汀(RMGIC)与正畸托槽的粘结强度。方法:60颗上颌第一前磨牙,随机分成6组,每组10颗。各组采用不同酸蚀浓度的表面处理,粘结后10min,置于人工唾液室温下保存24h。干燥、固定后,测定各样本的抗剪切强度,并记录托槽脱落后牙釉质粘结界面的粘结材料残留指数(ARI)。采用SPSS11.5统计软件包对结果进行χ2检验。结果:(1)托槽的抗剪粘结强度A组为(14.786±4.940)MPa,B组未检测,C组为(7.002±3.768)MPa,D组为(7.879±3.013)MPa,E组为(7.452±2.561)MPa,F组为(7.406±2.407)MPa。C、D、E、F组托槽的抗剪粘结强度比较,差异无显著性,P>0.05。A组与其他组的剪切强度比较,差异有统计学意义,P<0.01。(2)托槽脱落后,牙釉质粘结界面的粘结材料残留指数(ARI)经χ2分析,P>0.05,ARI计分在各组之间无显著性差异。结论:不同浓度的酸蚀剂对RMGIC粘接的托槽的抗剪切强度无显著影响。用不同浓度的酸蚀剂处理牙釉质后,牙釉质表面粘结剂残留指数ARI值无显著差异。
PURPOSE： To compare the shear strength of a light-cured resin reinforced glass ionomer cement with brackets after the enamel was etched with different etching concentrations. METHODS： sixty maxillary first premolars were randomly divided into 6 groups（A,B,C,D,E,F） with 10 teeth in each group. Then the teeth in each group were treated with different methods.All specimens were bathed with an artificial saliva after 10-minute bonding for 24 hours,then the shear strength were tested. The adhesive remain index （ARI） after bracket removal from the enamel was recorded and analyzed using SPSS11.5 software package. RESULTS： The mean shear bond strength was 14.786 MPa±4.940Mpa in group A, 7.002 MPa±3.768Mpa in group C, 7.879 MPa±3.013 Mpa in group D, 7.452 MPa±2.561 Mpa in group E, 7.406 MPa±2.407Mpa in group F,while not tested in group B.The difference was not significant among group C,D,E and F. While the difference was significant between group A and the other groups. The difference of ARI in each group was not significant. CONCLUSIONS： The different etching concentrations in this experiment had no significant influence to .the shear strength of the brackets which were boned with RMGIC. There was no significant difference of ARI among the six groups in which enamel was treated with different etching concentrations.
出处
《上海口腔医学》
CAS
CSCD
2007年第1期85-88,共4页
Shanghai Journal of Stomatology
