Effects of different resin core materials on the overall flexural strength of fiber posts / 中国组织工程研究

ABSTRACT

BACKGROUND:Selection of resin core materials may affect the overal strength of the fiber posts. OBJECTIVE:To compare the overal 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 repairgroup 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.