表面处理及粘结剂对氧化锆与牙釉质间剪切粘结强度的影响

摘要

目的 研究表面喷砂处理及不同正畸粘结剂对氧化锆陶瓷与牙釉质间剪切粘结强度的影响.方法 40颗离体上颌第一前磨牙,应用计算机辅助设计与计算机辅助制作系统设计和制作粘结面与牙面紧密贴合的个性化氧化锆陶瓷试件.将试件随机分为4组,分别选择粘结面喷砂处理和粘结面无处理,选择京津釉质粘结剂和3M Transbond XT光固化粘结剂.按要求粘结24 h后,万能材料试验机测定剪切粘结强度,并进行统计学分析.结果 喷砂组剪切粘结强度显著高于未喷砂组(P＜0.05),两种粘结剂的剪切粘结强度无显著差异(P＞0.05).结论 表面喷砂处理后,无论使用京津釉质粘结剂或是3M Transbond XT光固化粘结剂,氧化锆陶瓷与牙釉质间均可获得足够的剪切粘结强度.%Objective To evaluate the effects of sandblasting and different orthodontic adhesives on shear bond strength between zirconia and enamel. Methods Zirconia ceramic samples were designed and manufactured for 40 extracted human maxillary first premolars with CAD/CAM system. The samples were randomized into 4 groups for surface treatment with sandblasting and non-treated with adhesives of 3M Transbond XT or Jingjin dental enamel bonding resin. After 24 h of bonded fixation, the shear bond strengths were measured by universal mechanical testing machine and analyzed with factorial variance analysis. Results The shear bond strength was significantly higher in sandblasting group than in untreated group (P< 0.05) and comparable between the two groups with the adhesives of Transbond XT and dental enamel bonding resin (P>0.05). Conclusion The shear bond strength between zirconia and enamel is sufficient after sandblasting regardless of the application of either adhesive.