Trauma finite element modeling and analysis of ulna coronoid process fracture with posterior dislocation of elbow joint
JIN Yanyan1, YE Hao1, LI Yanyan1, CHEN Jiani1, WU Yizhuo1, CHANG Yuchen1, ZHANG Lei2, WANG Jianshun3, CHEN Lei4, WU Lijun1
1.Institute of Digitized Medicine and Intelligent Technology, Wenzhou Medical University, Wenzhou 325035, China; 2.Department of Orthopedics, the Third Affiliated Hospital of Wenzou Medical University, Wenzhou 325200, China; 3.Department of Orthopedics, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou 325027, China; 4.Department of Orthopedics, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China
JIN Yanyan,YE Hao,LI Yanyan, et al. Trauma finite element modeling and analysis of ulna coronoid process fracture with posterior dislocation of elbow joint[J]. JOURNAL OF WEZHOU MEDICAL UNIVERSITY, 2022, 52(7): 539-544.
Abstract：Objective: To establish the ulna coronary finite element model of the fracture after the combined elbow dislocation and to study the influence of posterior elbow dislocation on joint stability. Methods: The intact elbow joint and forearm (IEJF) finite element model and fractured ulnar coronoid-process and forearm (FUCF) finite element model were established, and two groups of physiological loads with compression and flexion (three amplitudes for each group) were used for the calculation, verification and stress analysis. Results: The IEJF and FUCF finite element models with complete structure were established and verified. The results were consistent with clinical practice. Compared with the IEJF finite element model, the FUCF finite element model presented serious stress concentration in the radial head, and the longitudinal compression displacement of the elbow joint under different compressive force and the flexion angle caused by different flexion bending moments were both increased. Conclusion: The fracture of the coronoid process of the ulna and the posterior dislocation of the elbow might affect the elbow joint and forearm longitudinal instability to some extent. The elbow joint and forearm finite element model constructed in this experiment can be used to evaluate the clinical stability of ulna coronoid process fracture with posterior dislocation of elbow and the formulation of surgical treatment plan.
