郑州大学学报（医学版）2018，Vol.53Issue(3)：344-347,4.DOI:10.13705/j.issn.1671-6825.2017.08.110
CAD/CAM三种修复方式对邻牙合缺损上颌前磨牙抗折性的影响
Fracture resistance of maxillary premolars with mesial occlusal cavity re-stored with 3 kinds of CAD/CAM ceramic restorations
摘要
Abstract
Aim:To assess the fracture resistance of maxillary premolars with mesial occlusal cavity after CAD/CAM ceramic restorations.Methods:Thirty-two intact human maxillary first premolars were randomly assigned into four groups (n=8). The teeth in control group(group A) were not treated. The teeth in the other 3 groups were endodontically treated and all received cavity preparation. Postendodontic restorations for group B,C, and D were inlay, onlay, and full-crown with CAD/CAM milling lithium disilicate reinforced ceramics. Then all the specimens were subjected to fracture failure tests by a universal testing machine. The fracture loads and form were recorded.Results: The teeth in group B presented the lowest fracture resistance values[(425.13 ± 56.28) N](P<0.05). There was no significant difference between group C,D and group A(P>0.05). The teeth in group B and C were mainly in the form of repairable fracture, and those in group D were mainly in the pattern of unrepairable fracture.Conclusion: Postendodontic maxillary premolars with mesial occlusal cavity can recover the strength of the lost dental tissue,when restored with onlay or full-crown by CAD/CAM mill-ing lithium disilicate reinforced ceramics,and teeth with onlay are mainly in the pattern of repairable fracture.关键词
CAD/CAM/邻牙合缺损/上颌前磨牙/抗折性能Key words
CAD/CAM/mesial occlusal cavity/maxillary premolar/fracture resistance分类
医药卫生引用本文复制引用
张静亚,方圆圆,邱晓霞,张朋,翟晓阳,张三柯..CAD/CAM三种修复方式对邻牙合缺损上颌前磨牙抗折性的影响[J].郑州大学学报（医学版）,2018,53(3):344-347,4.基金项目
河南省教育厅高校重点科研项目(18A320055) （18A320055）
河南省科技厅科技攻关项目(152102310258) （152102310258）
