Fracture resistance of CAD/CAM endocrowns made from different materials in maxillary premolar interproximal defects

Objectives This in vitro study aims to compare the fracture resistance of three CAD/CAM materials used in endocrown restoration of interproximal defects in maxillary premolars. Materials and methods 45 maxillary premolars extracted as part of orthodontic treatment were included. Following standardiz...

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Bibliographic Details
Published in:Clinical oral investigations 2024-03, Vol.28 (4), p.220-220, Article 220
Main Authors: Jin, Fuqian, Yu, Xiaoyan, Zhou, Haolin, Zhou, Jin, Yang, Jing, Luo, Yi, Chen, Zhu
Format: Article
Language:English
Subjects:
Bicuspid
Ceramics
Ceramics - chemistry
Composite Resins - chemistry
Computer-Aided Design
Crowns
Dental Porcelain - chemistry
Dental Restoration Failure
Dental Stress Analysis
Dentistry
Endodontics
Fractures
Materials Testing
Maxilla
Medicine
Polymers
Premolars
Root canals
Teeth
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Summary:Objectives This in vitro study aims to compare the fracture resistance of three CAD/CAM materials used in endocrown restoration of interproximal defects in maxillary premolars. Materials and methods 45 maxillary premolars extracted as part of orthodontic treatment were included. Following standardized root canal treatment, all teeth were prepared into Mesial-Occlusal (MO) cavity types. The samples were then randomly divided into three groups: LD [repaired with lithium disilicate glass ceramics (IPS e.max CAD)], VE [treated with polymer-infiltrated ceramics (Vita Enamic)], and LU [repaired with resin-based nanoceramics (Lava Ultimate)]. Axial static loading was applied using a universal testing machine at 1 mm/min until fracture, and fracture resistance and failure modes were recorded. Results Regarding Fracture Resistance Values (FRVs), the LD group exhibited significantly higher values than the other two groups, VE ( P  = 0.028) and LU ( P  = 0.005), which showed no significant difference ( P  = 0.778). On the other hand, regarding failure modes, the LD group had a higher prevalence of irreparable fractures compared to the other two groups, VE ( P  
ISSN:1436-3771
1432-6981
1436-3771
DOI:10.1007/s00784-024-05605-6