Ten-year observation of dentin bonding durability of 4-META/MMA-TBB resin cement -a SEM and TEM study
Ten-year observation of dentin bonding durability of 4-META/MMA-TBB resin cement -a SEM and TEM study
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DOI：
10.4012/dmj.2011-003
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发表时间：
2011-07-01
影响因子：
2.5
通讯作者：
Tagami, Junji
中科院分区：
文献类型：
--
作者：
Aoki, Kanako;Kitasako, Yuichi;Tagami, Junji
本研究旨在通过评估拉伸粘合强度和 SEM 来评估 4-META/MMA-TBB 树脂水门汀十年内的牙本质粘合耐久性。和 TEM 观察。在第 1 天和 10 年后评估 Super Bond C&B (SB) 与牛牙本质的拉伸粘合强度。通过SEM观察脱粘后的失效模式。通过 TEM 在基线和 10 年后观察界面超微结构和纳米渗漏。 10年后拉伸粘合强度显着下降。破坏模式从树脂内聚破坏转变为粘合破坏或牙本质内聚破坏。 TEM 观察显示，10 年后，混合层内的树脂和胶原蛋白网络均发生降解，并且混合层底部出现纳米泄漏。 SB与牙本质的结合强度显着下降，混合层降解，而覆盖的疏水性树脂层在10年内几乎没有崩解。
This study aimed to assess dentin bond durability of 4-META/MMA-TBB resin cement over ten years, by evaluating the tensile bond strength, and SEM. and TEM observations. Tensile bond strength of Super Bond C&B (SB) to bovine dentin was evaluated at 1 day and after 10 years. The mode of failure after debonding was observed by SEM. Interfacial ultrastructure and nanoleakage was observed by TEM at the baseline and after 10 y. The tensile bond strength significantly dropped after 10 y. The failure pattern shifted from cohesive failure in resin towards adhesive failure or cohesive failure in dentin. TEM observation revealed degradation of both resin and collagen networks within the hybrid layer and nanoleakage at the base of the hybrid layer after 10 y. The bond strength of SB to dentin significantly decreased, and the hybrid layer degraded, while the overlying hydrophobic resin layer showed little disintegration over 10 y.