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Updated: Aug 17, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
[Fracture resistence force of the cement-expanded composite screw post-core system]
Xin-min Chen1, Nian-bin Wang, Yan Yang
1Deparment of Prosthodontics, West China Shcool of Stomatology, Sichuan University, Chengdu 610041, China.
Objective:
This is a study comparing the effects of different post designs on the fracture resistence.
Methods:
Twenty-seven simulated tooth roots made of polymethyl methacrylate (PMMA) were divided into three groups, then the cement-expanded composite screw post-core system (CECSP), cement screw post-core system (CSP) and cast metal post-core system (CMP) were manufactured. The root and post-core system was compressed by the speed of 1 mm/min on the Instron 4302 and the fracture resistence force was recorded.
Results:
Statistical analysis of the measured values showed the fracture resistence force of CECSP and CMP to be significantly greater than that of CSP (P < 0.05), but there was no significant difference between the fracture resistence force of CECSP and CMP (P > 0.05).
Conclusion:
The fracture mechanical properties of CECSP are much better than those of cement screw post-core system and are similar to cast metal post-core system. Therefore, it is possible to find a new way for restoration of endodontally treated teeth.
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