南方医科大学学报Issue(11)：1682-1684,1688,4.
根管治疗术后不同修复方式对牙根抗折性能的影响
Effects of different restoration methods on fracture resistance of endodontically treated teeth
摘要
Abstract
Objective To evaluate the effect of different restoration methods on fracture resistance of endodontically treated teeth. Methods Fifty intact extracted maxillary first premolars were randomly divided into 5 groups. Medial-occlusal cavity models were established in all the test groups (B-E) according to the same standard, followed by treatments with defect exposure only, defect filling with light cured composite resin, indirect resin inlays, or light cured composite resin combined with Biosplint fiber. Each specimen was tested using a universal test machine at 1.00 mm/min until fracture and the fracture load was recorded. The load angle was 45 degree to the long axis of the teeth, and the load was pointed to the middle of the lingual surface on the buccal cusp. The fracture resistance was analyzed statistically. Results The mean load to cause fracture of the samples in each group group A to E was 1.27 ± 0.41, 0.23 ± 0.17, 0.55 ± 0.31, 0.89 ± 0.40, and 0.98 ± 0.34 kN, respectively, showing significant differences between the groups. Conclusion The fracture resistance of the teeth is reduced after endodontic therapy, but can be increased significantly by restoration with composite resin inlay or light cured composite resin combined with Biosplint fiber.关键词
根管治疗/修复方式/抗折性能/力学性能Key words
endodontic therapy/restoration/fracture resistance/mechanical property引用本文复制引用
林天赐,梁翠云,黄达鸿..根管治疗术后不同修复方式对牙根抗折性能的影响[J].南方医科大学学报,2013,(11):1682-1684,1688,4.基金项目
广东省自然科学基金 （）
