摘要
用颈部龋坏的离体牙６０颗，去龋备洞，１组，去除玷污层后充填；２组，去除玷污层加涂布化学粘接剂于窝洞壁后充填；３组，对照组：直接充填银汞合金。用扫描电镜和图像分析仪测量充填体与窝洞壁间微缝隙的宽度，并观察充填体－牙体界面的形态。结果发现：去除玷污层组的充填体与窝洞壁间缝宽６．３１μｍ，粘接剂组仅３．４９μｍ，而对照组为１４．２２μｍ，差异均有显著性。
ァ his in vitro study evaluated the effect of removing smear layer and applying adhesive on the marginal adapt ation of a malgam fillings to cavity walls.Three groups were established,cavities in group1were exposed to 10% EDTA(pH7.4) for 1minute toremove smear layer be for eamalgam condensation;cavities in group 2 were also subjected to EDTA,then Mira dapt adhesive was applied on the walls,finally amalgam condensed into cavities before the adhesive set;cavities in group 3 re ceived no special treatment before amalgam condensation.After thermocycling,all teeth were subjected to SEM and image analyser.Results showed:Space between restorations and tooth structure in group1was6.31μm,space in group 2 with adhesive was 3.49 μm and micromechanical interlocking was observed while space in control group was 14.22 μm.Differ ence among the three groups was statistical significant.It was indicated that removing smear layer and using adhesive resin significan tlyimproved the adap tation ofamalgam to cavity walls.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
1997年第4期303-305,I015,共4页
West China Journal of Stomatology
关键词
玷污层
粘接剂
银汞合金
边缘密合度
smear layer adhesive resin amalgam marginal adaptation
