In vivo degradation of resin-dentin bonds produced by a self-etch and an etch-and-rinse adhesive
In vivo degradation of resin-dentin bonds produced by a self-etch and an etch-and-rinse adhesive
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DOI：
10.1111/j.1600-0722.2005.00222.x
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发表时间：
2005-08-01
影响因子：
1.9
通讯作者：
Van Meerbeek, B
中科院分区：
文献类型：
--
作者：
Koshiro, K;Inoue, S;Van Meerbeek, B
已知树脂-牙本质粘结在相对侵蚀性的口腔环境中降解。为了获得更深入的了解界面降解过程中，我们研究，通过使用透射电子显微镜（TEM），界面超微结构的两种粘合剂粘结到牙本质后1年在体内。在两只猴子的14颗完整牙齿的颊侧表面上制备V类洞，然后使用两步自蚀刻粘合剂Unifil Bond或两步蚀刻和冲洗粘合剂Single Bond与修复性微杂交复合材料Z250组合进行修复。1年后，10个其他牙齿被修复，使用相同的材料（对照）。1天后处死猴，测定与牙本质的微拉伸粘结强度，并用透射电镜观察界面超微结构。Unifil Bond的1-d和1-yr样本之间没有观察到树脂-牙本质界面形态的明显变化，而Single Bond则表现出界面降解的迹象，特别是在3 μ m深的混合层底部。总之，由蚀刻-冲洗粘合剂产生的粘合剂界面比由自蚀刻系统产生的粘合剂界面对降解的抵抗力更低。
Resin-dentin bonds are known to degrade in the relatively aggressive oral environment. In order to obtain greater insight into the interfacial degradation process, we examined, by using transmission electron microscopy (TEM), the interfacial ultrastructure of two adhesives bonded to dentin after 1 yr in vivo. Class V cavities were prepared on the buccal surfaces of 14 intact teeth of two monkeys and then restored by using either the two-step self-etch adhesive, Unifil Bond, or the two-step etch-and-rinse adhesive, Single Bond, in combination with the restorative microhybrid composite, Z250. After 1 yr, 10 other teeth were restored by using the same materials (controls). One day later, the monkeys were killed, following which the microtensile bond strength to dentin was determined and the interfacial ultrastructure was examined by TEM. Whereas no noticeable changes in the morphology of the resin-dentin interface were observed between the 1-d and 1-yr specimens for Unifil Bond, Single Bond exhibited signs of interfacial degradation, in particular at the bottom of the 3 mu m-deep hybrid layer. In conclusion, the adhesive interface produced by the etch-and-rinse adhesive was less resistant to degradation than that produced by the self-etch system.