Piemjai Morakot, Waleepitackdej Onusa, Garcia-Godoy Franklin
Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand.
Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA.
Polymers (Basel). 2023 Jan 5;15(2):283. doi: 10.3390/polym15020283.
The aim of this study is to compare the marginal seal and tensile bond strength (TBS) of prostheses fixed to enamel-dentin using different adhesive systems. Resin-composite inlays directly fabricated from Class V cavities of extracted human molars/premolars and mini-dumbbell-shaped specimens of bonded enamel-dentin were prepared for microleakage and tensile tests, respectively. Four adhesive systems were used: primerless-wet (1-1 etching for 10-, 30-, or 60-s, and 4-META/MMA-TBB), primer-moist (All-Bond2 + Duolink or Single-Bond2 + RelyX ARC), self-etch (AQ-Bond + Metafil FLO), and dry (Super-Bond C&B) bonding. Dye penetration distance and TBS data were recorded. Failure modes and characteristics of the tooth-resin interface were examined on the fractured specimens. All specimens in 10-, 30-, and 60-s etching primerless-wet, Super-Bond, and AQ-Bond had a microleakage-free tooth-resin interface. Primer-moist groups showed microleakage at the cementum/dentin-resin margin/interface. Significantly higher TBSs (p < 0.05) were recorded in primer-less-wet and Super-Bond groups with the consistent hybridized biopolymer layer after the chemical challenge and mixed failure in tooth structure, luting-resin, and at the PMMA-rod interface. There was no correlation between microleakage and TBS data (p = −0.148). A 1−3 µm hybrid layer created in the 10−60 s primerless-wet technique, producing complete micro-seal and higher tensile strength than enamel and cured 4-META/MMA-TBB, may enhance clinical performances like Super-Bond C&B, the sustainable luting resin.
本研究的目的是比较使用不同粘结系统固定在釉质-牙本质上的修复体的边缘封闭性和拉伸粘结强度(TBS)。分别从拔除的人类磨牙/前磨牙的Ⅴ类洞直接制作树脂复合材料嵌体以及制备粘结釉质-牙本质的微型哑铃形标本,用于微渗漏和拉伸试验。使用了四种粘结系统:无底漆-湿粘结(1-1酸蚀10、30或60秒,以及4-META/MMA-TBB)、有底漆-湿粘结(全粘结2+多链路或单键2+瑞路适ARC)、自酸蚀(AQ粘结+美塔菲尔FLO)和干式(超强粘结C&B)粘结。记录染料渗透距离和TBS数据。在断裂标本上检查牙齿-树脂界面的失效模式和特征。10、30和60秒酸蚀的无底漆-湿粘结、超强粘结和AQ粘结的所有标本的牙齿-树脂界面均无微渗漏。有底漆-湿粘结组在牙骨质/牙本质-树脂边缘/界面处出现微渗漏。在无底漆-湿粘结和超强粘结组中,化学刺激后形成一致的杂交生物聚合物层,牙齿结构、粘结树脂和PMMA棒界面出现混合失效,记录到显著更高的TBS(p<0.05)。微渗漏和TBS数据之间无相关性(p = -0.148)。在10-60秒无底漆-湿粘结技术中形成的1-3μm杂交层,产生了完全的微封闭,并且比釉质和固化的4-META/MMA-TBB具有更高的拉伸强度,可能会增强类似超强粘结C&B这种可持续粘结树脂的临床性能。