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目的比较全酸蚀和自酸蚀黏结系统对牙颈部楔状缺损形成的黏结界面超微结构的影响。方法2006年9月至2007年1月在大连医科大学附属第一医院口腔科选用6颗新鲜拔除的无龋人上颌前磨牙在颊侧颈部制备3mm×3mm×2mm人造楔状缺损。使用全酸蚀单瓶系统(single bond,SB),自酸蚀一步黏结系统(adper prompl-pop,AP)处理牙面,以罗丹明B异硫氰酸盐(rhodamine B isothiocyanate)为荧光素,使用激光扫描共聚焦显微镜(CLSM)观察比较黏结界面的微观结构。结果在全酸蚀和自酸蚀黏结剂形成的黏结界面上,两种黏结剂均有良好的渗透,没有发生黏结材料与黏结界面分离的情况。SB产生的树脂突较长、混合层较厚,均大于黏结剂AP。结论SB与AP作用同类型的牙本质上,AP比SB形成的混合层薄,树脂突短。

Evaluating the bonding interface of different adhesive systems in class V non-carious lesions under CLSM

Objective To examine the effect of total-etch and self-etch adhesives on the bonding interface of class V non-carious lesions. Methods A total of 6 maxillary bicuspids were divided into two groups. Artifically prepared wedge-shaped lesions were made in sound maxillary bicuspids and bonded using the Single Bond （SB， total-etching adhesive）， Adper Promp L-Pop（AP， one-step self-etching） according to the manufacturer’s instruction. The primer component was labeled with Rhodamine B Isothiocyanate. Observe the dentin bonding interface by CLSM. Results Whatever in the total-etch or self-etch， both the bonding interfaces had favorable infiltration. No separation happened between the bonding materials and interfaces. Resin tag and hybrid layer in total-etching adhesive （SB） were longer and thicker than in self-etching adhesive （AP）. Conclusion When bonding the same type dentin substrate， the resin rags are fewer and shorter and the hybrid layers are thinner in used self-etching adhesive than total-etching.