Finite Element Analysis of Coronoid Prostheses with Different Fixation Methods in the Treatment of Comminuted Coronoid Process Fracture

Overview

Journal J Orthop Traumatol

Specialties Emergency Medicine
Orthopedics

Date 2022 Dec 5

PMID 36469153

Authors

Hailong Zhang

Kun-Jhih Lin

Po-Yi Liu

Yi Lu

Affiliations

Soon will be listed here.

Abstract

Background: Comminuted fractures of the coronoid process significantly compromise the stability and function of the elbow joint. Reconstruction of the coronoid process with a prosthesis has been suggested as an alternative to restore the architecture. The purpose of this study was to investigate the strength and stability of various methods for the fixation of a coronoid prosthesis by finite element analysis.

Materials And Methods: A coronoid prosthesis was designed based on the morphological information from computed tomography images acquired from 64 subjects in whom the top 40% of the coronoid process height was replaced. Four methods for the fixation of the prosthesis were suggested: (1) a double 2.0-mm fixation bolt, anterior to posterior; (2) a double 2.5-mm fixation bolt, anterior to posterior; (3) a single 4.0-mm fixation bolt, posterior to anterior; (4) a single 4.5-mm fixation bolt, posterior to anterior. The integrated prosthesis-bone constructs were analyzed via the finite element analysis of 10 simulated proximal ulna models with loading applied along the axis of the humerus and with three different elbow flexion angles (30°, 90°, and 130°). The maximum principal stress and the total deformation were quantified and compared.

Results: A coronoid prosthesis was developed. The maximum principal stress of the fixation bolts occurred around the neck of the fixation bolt. For a comparison of the strengths of the four fixation methods, the maximum principal stress was the lowest for fixation using a single 4.5-mm fixation bolt. The value of the maximum principal stress significantly decreased with increased elbow flexion angle for all fixation methods. The maximum deformation of the fixation bolts occurred at the head of the fixation bolt. For a comparison of the maximum deformations in the four fixation methods, the maximum deformation was the lowest for fixation using a single 4.5-mm fixation bolt. The value of the maximum deformation significantly decreased with increased elbow flexion angle for all fixation methods.

Conclusions: The present study suggested that fixation of a coronoid prosthesis with a single 4.5-mm fixation bolt from posterior to anterior is an excellent option in terms of the strength and stability. Level of Evidence Experimental study.

Citing Articles

Patient-specific finite element analysis of four different fixation methods for transversely unstable radial head fractures.

Yang L, Zhang X, Zhong Z, Li J, Xiong Z Sci Rep. 2024; 14(1):21134.

PMID: 39256418 PMC: 11387503. DOI: 10.1038/s41598-024-70602-4.

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