Fracture Resistance of Computer-Aided Design/Computer-Assisted Manufactured Glass-Ceramic Incisor Crowns Fabricated on Reverse-Tapered Preparations
Fracture Resistance of Computer-Aided Design/Computer-Assisted Manufactured Glass-Ceramic Incisor Crowns Fabricated on Reverse-Tapered Preparations
复制标题
计算机辅助设计/计算机辅助制造的玻璃陶瓷切牙牙冠的抗断裂性
DOI：
10.11607/ijp.5831
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Yatani Hirofumi
中科院分区：
文献类型：
--
作者：
Carbajal Jeison;Wakabayashi Kazumichi;Nakamura Takashi;Yatani Hirofumi
目的评价计算机辅助设计/计算机辅助制造(CAD/CAM)玻璃陶瓷切牙全冠的抗折性能。材料与方法用Trios扫描仪对已知总牙合会聚角度(-8、0、12度；n=20)的树脂基牙进行扫描，并用KaVo Arctica制作玻璃陶瓷全冠，在水中放置1天或30天，进行抗折试验。结果逆锥化制备的全冠抗折性能差异无统计学意义(P=0.05)。471)。结论采用倒锥法制作的前牙玻璃陶瓷全冠的抗折性能与0度或12度锥度基牙制作的全冠相似。
PurposeTo evaluate the fracture resistance of computer-aided design/computer-assisted manufactured (CAD/CAM) glass-ceramic incisor crowns fabricated on reverse-tapered preparations.Materials and methodsResin abutments with known total occlusal convergence angles (-8, 0, and 12 degrees; n= 20) were scanned with the TRIOS scanner, and glass-ceramic crowns were fabricated with KaVo Arctica, stored in water for either 1 or 30 days, and submitted to fracture test.ResultsThe fracture resistance of crowns made on reverse-tapered preparations was not significantly different (P=. 471) from crowns fabricated over abutments with 0-or 12-degree tapers, irrespective of the water storage period.ConclusionThe fracture resistance of anterior glass-ceramic crowns fabricated over reverse-tapered preparations was similar to that of crowns made on abutments with 0-or 12-degree tapers.