自酸蚀黏接剂对陶瓷托槽黏接强度的影响(英文)

Effect of self-etching prime/adhesive on bond strength of ceramic orthodontic brackets

背景:陶瓷托槽与牙齿间的黏接力较大,不容易安全去除,应用自酸蚀黏接剂能否降低其黏接强度,减少对牙釉质的损伤,一直是正畸医师关心的问题。目的:评估应用自酸蚀黏接系统黏接陶瓷托槽的黏接强度,并与国内临床最为常用的京津釉质黏接剂作比较。设计、时间及地点:对比观察实验,于2006-03在河北科技大学完成。材料:收集20个因正畸治疗拔除的完整前磨牙,要求所选牙齿表面釉质完好,有光泽、无裂纹、无龋坏、未曾接受任何化学治疗。陶瓷托槽采用美国3M公司的0.022系统标准方丝弓前磨牙陶瓷托槽,托槽底板面积12.61mm2;自酸蚀封闭剂和TransbondTM光固化黏接剂均为美国3M公司产品;传统酸蚀用京津釉质粘合剂由天津市合成材料研究所提供。方法:随机将20颗牙分为自酸蚀组和京津釉质组,每组10个牙齿,分别应用自酸蚀封闭剂+TransbondTM光固化黏接剂或京津釉质粘合剂黏接陶瓷托槽。主要观察指标:黏接托槽24h后,应用抗剪切测试仪分别测定两组的抗剪切强度,并对每一牙面上的黏接剂残留量进行统计。结果:自酸蚀组平均抗剪切强度低于京津釉质组,但差异无显著性意义(P>0.05),均在临床可接受范围内。自酸蚀组黏接剂残留量低于京津釉质组,差异有显著性意义(P<0.01)。结论:自酸蚀黏接剂黏接陶瓷托槽可以满足临床要求,且可适当降低其黏接强度,较易去除陶瓷托槽,从而减少对牙釉质的损伤。

BACKGROUND： The shear bond strength between ceramic orthodontic brackets and teeth is so large that ceramic brackets are not easily eliminated safely. Whether the shear bond strength of self-etching primer/adhesive can be decreased and the injuries to enamel can be reduced has been always concerned by orthodontists. OBJECTIVE： To evaluate the bond strength between self-etching primer/adhesive system and ceramic orthodontic brackets and make a comparison with Jingjin enamel adhesive most commonly used by clinicians in China. DESIGN, TIME AND SETTING： Controlled observation, performed at Hebei University of Science and Technology in March 2006. MATERIALS： Twenty permanent premolars extracted due to orthodontic treatment were selected. The premolars were required to have excellent enamel and gloss, no cracks or carious lesions, and have not been given any chemotherapy. Ceramic orthodontic brackets were arch wire ceramic premolar brackets with 0.022-inch standard edgewide （3M company, USA）. The bottom bracket area was 12.16 mm2. Self-etching sealant and TransbondTM light-cure adhesive were purchased from 3M company, USA. Jingjin enamel adhesive, a conventional self-etching adhesive, was provided by Tianjin Institute of Synthetic Materials Industry, China. METHODS： The 20 premolars were randomly evenly self-etching sealant and TransbondTM light-cure adhesive Jingjin enamel adhesive was used. divided into a self-etching primer/adhesive group, in which, were applied, and a Jingjin enamel adhesive group, in which, MAIN OUTCOME MEASURES： After 24 hours, shear bond strength was determined respectively in the two groups using anti-shearing testing machine. Simultaneously, residual adhesive remaining on the teeth was examined. RESULTS： The mean shear bond strength was lower in the self-etching primer/adhesive group than in the Jingjin enamel adhesive group, but there was no significant difference （P 〉 0.05）. The mean shear bond strength in the two groups was clinically acceptable. The residual adhesive remaining on the teeth was significantly less in the self-etching prime/adhesive group than in the Jingjin enamel adhesive group （P 〈 0.01）. CONCLUSION： Self-etching prime/adhesive system used for bonding ceramic orthodontic brackets can satisfy clinical requirements. Moreover, its bond strength can be appropriately decreased and ceramic brackets are easily removed, thereby, injuries to enamel can be reduced.