摘要
Abstract
Objective To investigate the effects of tooth liquid polish sealant on the shear bond strength of the brackets. Methods Sixty freshly extracted sound human premolars after acid etching were randomly divided into 2 groups. A and B groups were subdivided into 3 groups according to three different orthodontic adhesives, with 10 teeth in each group. Group A:BisCover resin polish was applied on the etched tooth surfaces before the brackets were bonded. While in group B, no additional primer was used on the surface. The specimens were bonded with brackets with three bonding systems respectively:(1)no-mix system(West-lake ba er). (2)light-cured bonding system Transbond XT. (3)light-cured resin-modified glass ionomer adhesive Fuji Ortho LC. After bonding, all samples were stored in distilled water at 37. 0℃ for 48 hours and thermal cycled( × 1200, 5-55℃). The shear bond strength( SBS) was tested by universal mechanical testing machine,and the adhesive remnant index( ARI) was also detected. Results No matter use BisCover or not, no significant difference was found in shear bond strength and ARI between the six groups. Conclusion The treatment of tooth liquid polish sealant to prevent demineralization did not affect the shear bond strength of brackets.关键词
抗剪强度/液体封闭剂/粘结/釉质脱矿Key words
shear bond strength/liquid sealant/bonding/enamel demineralization分类
医药卫生
