Biomechanical finite element analysis of three different internal fixation methods for Regan-Morrey type II fracture of the coronoid process of the ulna

doi:10.13418/j.issn.1001-165x.2025.3.16

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Chinese Journal of Clinical Anatomy ›› 2025, Vol. 43 ›› Issue (3) : 351-357. DOI: 10.13418/j.issn.1001-165x.2025.3.16

Biomechanical finite element analysis of three different internal fixation methods for Regan-Morrey type II fracture of the coronoid process of the ulna

Zhang Yongqiang^1,2, Ye Xiangling³, Ruan Huaimin⁴, Xie Wenguan², Lin Yuanxun¹, Kuang Mingye², Zhang Zhiming²*, Huang Zhe²*

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Abstract

Objective To compare the biomechanical stability of three different internal fixation methods by constructing an effective finite element model of the coronoid process fracture of the ulna. The diversity in the injury mechanism of Regan-Morrey Type II fracture of the coronoid process of the ulna makes it difficult to establish a unified surgical standard in clinical treatment. Methods After establishing a finite element model of the coronoid process fracture of the ulna using three-dimensional finite element modeling software, models of post-operative internal fixation with a T-shaped plate (A), an L-shaped plate (B), and tension screws (C) were created using related finite element software. These models were then subjected to loading analysis in a simulated supine position. Results Under the same loading conditions, the maximum displacement at the fracture line and the average displacement of nodes on the fracture line of the Regan-Morrey Type II fracture of the coronoid process were in the order C>B>A. Conclusions The use of a T-shaped plate for internal fixation of the Regan-Morrey Type II fracture of the coronoid process of the ulna demonstrates good biomechanical stability, followed by the L-shaped plate and tension screws.

Key words

Ulna / Coronoid process fracture of the ulna / Internal fixation / Finite element analysis / Biomechanics

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Zhang Yongqiang, Ye Xiangling, Ruan Huaimin, Xie Wenguan, Lin Yuanxun, Kuang Mingye, Zhang Zhiming, Huang Zhe. Biomechanical finite element analysis of three different internal fixation methods for Regan-Morrey type II fracture of the coronoid process of the ulna[J]. Chinese Journal of Clinical Anatomy. 2025, 43(3): 351-357 https://doi.org/10.13418/j.issn.1001-165x.2025.3.16

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