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| Effect of pre-etching time on the marginal microleakage of the V caves after the composite resin filling |
| HUI Min1, MIAO Detian2, WANG Xinxin3, ZHOU Han2, ZHANG Xiaoming2 |
1 Experimental Teaching Center of Stomatology,Binzhou Medical University,Binzhou 256603,P.R.China;
2 Prosthodontics Department,Binzhou Medical University Hospital;
3 Oral medicine,Rizhao People's Hospital |
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Abstract Objectives To reduce the time of pre-etching on the basis of preacid etching 15 s,and to study the effect of reducing the preacid etching time on the marginal microleakage of the V caves after the composite resin filling.Methods Eighty freshly extracted molar teeth were randomly divided into four groups,20 in each group, which were treated by pre acid etching time 0 s, 3 S, 10 s and 15 s respectively.Then the Results were analyzed with the evaluation criteria of the 0～4 level microleakage.Results The microleakage of all pre-etching groups was significantly lower than that of the non pre-etching group,but there was no significant difference in microleakage between different etch groups.Conclusion Reducing the time of pre etching can reduce the marginal microleakage of V class cavity after composite resin filling,nothing to do with pre-etching time.Dentists can reduce acid etching time to reduce the adverse effect of acid etching on dentin adhesion.
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Received: 03 November 2018
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