【摘要】 目的　研究氢氟酸蚀刻对 Ｖｉｔａ 烤瓷贴面粘结抗剪强度的影响。方法　选择 ３０ 个氢氟酸（ Ｈ Ｆ）蚀刻瓷贴面的浓度—时间搭配点，模拟临床实际情况，作整体粘结抗剪强度测试和体视显微镜观察。结果　 Ｈ Ｆ酸各浓度—时间点蚀刻烤瓷后的剪切强度值均比对照组高。 Ｈ Ｆ酸浓度—时间的最佳搭配点为：２．５％ ５ｍ ｉｎ，５．０％ ２．５ｍ ｉｎ，７．５％ ，１５％ ５ｍ ｉｎ，１０％ ３０ｓ。烤瓷—树脂—牙釉质间的粘结破坏形式以混合破坏为主。结论　蚀刻可增加烤瓷与牙釉质间的粘结抗剪强度。更多还原

【Abstract】 Objective Understand the effect of shear bond test of HF acid etching porcelain bonded to enamel with different concentration and disposing time.Methods After HF acid etching under 30 groups composed of 5 different HF concentrations and 6 exposing times,shear bonding strength of porcelain to enamel was tested under imitating occlusion and debonding types of the composite were examined by microscope.Results The favorable concentration time groups for clinics were 2.5% 5min;5.0% 2.5min;10% 30s;7.5%、15% 5min.The debonding type of porcelain resin enamel composite body was mixed one.Conclusion The results showed HF acid etching technique had a positive influence on the bonding strength of porcelain to enamel.更多还原