不同树脂核材料影响纤维桩核整体抗折强度的比较

背景：纤维桩修复中树脂核材料的选择可能影响桩核的整体强度。目的：比较5种树脂核材料分别与玻璃纤维桩结合后的整体抗折强度。方法：将50个viva玻璃纤维桩随机分为5组，分别与MEDENTAL双重固化树脂水门汀、伊蒂娜双重固化树脂水门汀、Bisco BisCem树脂水门汀、3M光固化纳米复合树脂P60及PULPDENT双重固化树脂水门汀黏结，将5组桩核的根管部分分别用自凝塑料包埋，固化后固定于万能试验机上并与牙体长轴成135°角加载于核部，加载速度为1.0 mm/min，直至断裂，测得断裂时受力情况。结果与结论：MEDENTAL双重固化树脂水门汀组、伊蒂娜双重固化树脂水门汀组、Bisco BisCem树脂水门汀组、3M光固化纳米复合树脂P60组及PULPDENT双重固化树脂水门汀组的抗折强度分别为(83.248±7.857)，(89.230±4.326)，(95.188±5.147)，(76.646±6.463)，(83.064±3.964) N。除MEDENTAL双重固化树脂水门汀组与PULPDENT双重固化树脂水门汀组抗折强度无差异外，其余各组间两两比较差异均有显著性意义(P < 0.05)。结果表明Bisco BisCem树脂水门汀与纤维桩结合后具有较高的抗折强度。中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程全文链接：

Effects of different resin core materials on the overall flexural strength of fiber posts

BACKGROUND:Selection of resin core materials may affect the overall strength of the fiber posts.OBJECTIVE:To compare the overall flexural strength of five kinds of resin core materials combined with glass fiber posts. METHODS:Fifty viva glass fiber posts were randomly divided into five groups respectively binding to five different resin materials for repair: group A, MEDENTAL dual curing resin cement + glass fiber post; Group B, Tina dual curing resin cement + glass fiber post; group C, Bisco BisCem + glass fiber post; group D, 3M nano composite resin curing light P60 + glass fiber post; group E, PULPDENT dual curing resin cement + glass fiber post. The root canals were embedded with self-curing plastic, and fixed in the universal testing machine. The load in tooth length axis was added onto the core at a 135° angle with a loading speed of 1.0 mm/min, until the fracture. Then, the stress at fracture and the fracture mode were measured.RESULTS AND CONCLUSION:The flexural strength was (83.248±7.857) N in group, (89.230±4.326) N in group B, (95.188±5.147) N in group C, (76.646±6.463) N in group D, and (83.064±3.964) N in group E. Except groups A and E, there were significant differences between every two groups (P < 0.05). These findings indicate that Bisco BisCem resin cement binding to the fiber post can obtain a higher flexural strength.