Fracture Resistance of the Crown Retained By Milled Computer-Aided Design-Computer-Aided Manufacturing Unidirectional Fiber-Reinforced Composite Post
Issued Date
2024-01-01
Resource Type
ISSN
1309100X
Scopus ID
2-s2.0-85216537611
Journal Title
Journal of International Dental and Medical Research
Volume
17
Issue
4
Start Page
1510
End Page
1516
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of International Dental and Medical Research Vol.17 No.4 (2024) , 1510-1516
Suggested Citation
Boriboon N., Urapepon S. Fracture Resistance of the Crown Retained By Milled Computer-Aided Design-Computer-Aided Manufacturing Unidirectional Fiber-Reinforced Composite Post. Journal of International Dental and Medical Research Vol.17 No.4 (2024) , 1510-1516. 1516. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/104206
Title
Fracture Resistance of the Crown Retained By Milled Computer-Aided Design-Computer-Aided Manufacturing Unidirectional Fiber-Reinforced Composite Post
Author(s)
Author's Affiliation
Corresponding Author(s)
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Abstract
The study aimed to compare the fracture resistance of the crown retained by milled computer - aided design - computer - aided manufacturing ( CAD - CAM) unidirectional fiber - reinforced composite posts across two distinct designs with a commercial post. Twenty-one extracted permanent mandibular premolars were endodontically treated and randomly divided into three groups of seven specimens. The first group received one-piece CAD-CAM unidirectional fiber-reinforced composite posts and cores (MPC). The second group received CAD-CAM milled posts in combination with composite cores (MP). The control group used commercial fiber posts (RelyXTM fiber post). After cementing the post, core, and crown, each specimen was subjected to a compressive load at an angle of 60 degrees to the long axis of the tooth at a speed of 1 mm/min until fracture. The fracture characteristics were observed in two aspects: external crack position and internal debonded position. The fracture resistance of the MPC group (2047.5 ± 238.6 N) was significantly higher than the MP (1625.6 ± 211.1 N) and control group (1651.1 ± 261.7 N). Only internal debonded positions found differ between groups, not external crack positions. One-piece fiber-reinforced composite posts showed superior fracture resistance and may be used as an alternative treatment for post-restored teeth.