Finite element analysis of stability of ulnar coronoid process prosthesis using 2.0 mm and 2.5 mm screws fixation
10.3760/cma.j.issn.0253-2352.2020.01.007
- VernacularTitle: 2.0 mm和2.5 mm直径螺钉固定钛合金尺骨冠突假体稳定性的有限元分析
- Author:
Yi LU
1
;
Hailong ZHANG
1
;
Kunzhi LIN
2
;
Hongwen WEI
2
Author Information
1. Department of Sports Medicine, Bejing Jishuitan Hospital, Beijing 100035, China
2. Chun Yuan Christian University, Taiwan, China
- Publication Type:Clinical Trail
- Keywords:
Ulna;
Prostheses and implants;
Finite element analysis
- From:
Chinese Journal of Orthopaedics
2020;40(1):46-51
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To compare difference in stability between two fixation modes in application of three-dimensional (3D) printed coronoid process prosthesis.
Methods:3D coronoid process prosthesis was reconstructed from computed tomography (CT) scanning acquired from volunteers with normal bony architecture of elbow. The prosthesis fixation was simulated using screws with diameter of 2.0 mm and 2.5 mm separately. Finite element analysis (FEA) was conducted at elbow flexion with different angles and the parameters including the maximum equivalent stress and the maximum displacement were evaluated.
Results:Compared fixation using screw with the diameter of 2.0 mm and 2.5 mm, the maximum equivalent stress were 56.29 MPa and 39.96 MPa and the maximum displacement were 0.038 0 mm and 0.029 0 mm in 30° flexion of elbow; the maximum equivalent stress were 8.97 MPa and 8.12 MPa and the maximum displacement were 0.006 5 mm and 0.005 8 mm in 90° flexion of elbow; the maximum equivalent stress were 10.03 MPa and 9.32 MPa and the maximum displacement were 0.007 9 mm and 0.006 6 mm in 130° flexion of elbow. The maximum equivalent stress occurs at the junction of head and shaft with in both situations while the value from screw with diameter of 2.5 mm was lower. The displacement was smaller in the screw with diameter of 2.5 mm.
Conclusion:Compared to screws with the diameter of 2 mm, screw with the diameter of 2.5 mm shows superior stability in the fixation of 3D printed coronoid process prosthesis.
