Fracture strength of endodontically treated premolars restored with different post systems and metal-ceramic or monolithic zirconia crowns

被引：5
|
作者：
Mastrogianni, Anna [1 ]
Lioliou, Evdokia-Anna [1 ]
Tortopidis, Dimitrios [1 ]
Gogos, Christos [2 ]
Kontonasaki, Eleana [1 ]
Koidis, Petros [1 ]
机构：
[1] Aristotle Univ Thessaloniki, Sch Dent, Dept Prosthodont, Thessaloniki, Greece
[2] Aristotle Univ Thessaloniki, Sch Dent, Dept Endodontol, Thessaloniki, Greece
来源：
DENTAL MATERIALS JOURNAL | 2021年 / 40卷 / 03期
关键词：
Dental restoration failure; Post and core technique; Metal ceramic crown; Monolithic zirconia crown; Premolars; FIBER-REINFORCED POSTS; 5-YEAR FOLLOW-UP; IN-VITRO; FAILURE PATTERN; BITE FORCE; MAXILLARY PREMOLARS; STRESS-DISTRIBUTION; COMPOSITE RESIN; CORE SYSTEMS; RESISTANCE;
D O I：
10.4012/dmj.2020-223
中图分类号：
R78 [口腔科学];
学科分类号：
1003 ;
摘要：
The purpose of this study was to investigate the fracture strength of endodontically treated human maxillary premolars (ETP) restored with posts and metal ceramic (MC) or monolithic zirconia (MZ) crowns. Sixty ETP were randomly divided into 3 groups. Teeth in control group (C) received a resin filling. ETP in the MC group were restored with prefabricated metal posts, composite cores and MC crowns while in the MZ group with glass-fiber posts, composite cores and MZ crowns. Half of the specimens were loaded at a 135 degrees angle and half under axial loading until fracture. The fracture modes were divided in repairable and irreparable using optical microscopy. Mean fracture strength was significantly higher for MC than for MZ crowns and control group only under axial loading. The distribution of repairable and irreparable failures presented no significant differences. Crown placement significantly improved the fracture strength of ETP irrespectively of post and crown type.
引用
收藏
页码：606 / 614
页数：9
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