Stress Distribution and Static Mechanical Analysis of 3D Printed Titanium Alloy Mandible Median Joint Fracture Plate

doi:10.13701/j.cnki.kqyxyj.2024.06.009

Abstract

Abstract: Objective: To analyze the stress distribution of titanium plate during the fixation process of mandible median combined fracture, and to evaluate the thickness, surface defects, surface roughness, and mechanical properties of 3D printed titanium plate. Methods: The shape of titanium plate used for finite element analysis and static mechanical analysis was digitally designed and modeled. Firstly, the middle joint fracture of mandible was simulated and fixed with titanium plate under unilateral biting force. Then, the thickness, roughness, and static mechanical properties of finished titanium plate and 3D printed titanium plate were tested. Results: By finite element analysis, the stress concentration of mandibular bone plate was mainly in the bridge part. The yield load and maximum load of 3D titanium plate were significantly greater than that of finished micro and small titanium plate. The thickness and roughness of the 3D printed titanium plate after grinding and polishing were close to that of the finished titanium plate. Conclusion: After 3D printed titanium plate is polished, its thickness parameters are accurate, and roughness and mechanical properties are better, which can meet clinical requirements.

Key words: finite element, 3D-printed, three-point bending

WANG Huaisheng, LIU Rui, SONG Zhenyu, SONG Yihan, JIANG Tingting, HAN Zekui, SUN Guoshu, WANG Xinyu. Stress Distribution and Static Mechanical Analysis of 3D Printed Titanium Alloy Mandible Median Joint Fracture Plate[J]. Journal of Oral Science Research, 2024, 40(6): 519-524.

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