伢典化学机械去龋法的粘结性能研究

目的：利用健康离体牛牙,评价伢典对健康牙本质与复合树脂间剪切粘结强度的影响。方法：选取新鲜拔除的牛切牙28颗,磨除唇面釉质,暴露牙本质,分为4组,即空白对照组,酸蚀组,伢典处理组,伢典处理＋酸蚀组。分为不做预处理组,37%磷酸酸蚀组,伢典处理牙本质表面3min组,伢典处理牙本质表面3min后再用37%磷酸酸蚀处理组。在牙本质表面粘结形成直径5mm,高3mm的光固化树脂圆柱体。37℃水浴24h后,以1mm/min的加载速度进行剪切粘结强度测试。结果：伢典处理后的健康牙本质的剪切粘结强度大于不做预处理的健康牙本质。伢典处理不影响酸蚀效果。结论：伢典对复合树脂与健康牙本质间的粘结强度没有显著影响。

A shear bond strength study of Carisolv chemomechanical caries removal

Objective： To evaluate the influence of Carisolv on the shear bond strength （SBS） in sound dentin. Methods： Twenty-eight bovine incisors were randomly divided into 4 groups. The enamel of the bovine incisors was grind up. Group 1 was treated with 0.9% saline. Group 2 was treated with 37% phosphoric acid. Group 3 was treated with Carisolv for 3min. Group 4 was treated with Carisolv for 3min and then 37% phosphoric acid followed. Resin composite for the adhesive system was placed on the bonded dentin. The specimens were kept in humid storage s at 37℃ for 24h. The SBS tests were performed in a universal testing machine with a crosshead speed at 1mm/min. Result： Carisolv treatment increased the SBS to sound dentin. Carisolv treatment did not interact with acid treatment. Conclusion： Carisolv has no adverse effect on SBS to healthy dentin when modern bonding system was used.