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Finite element analysis of basicervical femoral neck fracture treated with proximal femoral bionic nail

Authors :
Xiaodong Cheng
Yanjiang Yang
Jian Zhu
Guimiao Li
Wei Chen
Juan Wang
Qi Zhang
Yingze Zhang
Source :
Journal of Orthopaedic Surgery and Research, Vol 18, Iss 1, Pp 1-9 (2023)
Publication Year :
2023
Publisher :
BMC, 2023.

Abstract

Abstract Background Dynamic hip screws (DHS) and proximal femoral nail anti-rotation (PFNA) were recommended for basicervical femoral neck fracture (BFNF), however, with high rate of postoperative femoral neck shortening. The proximal femoral bionic nail (PFBN) was designed to decrease the postoperative complications associated with DHS and PFNA. The aim of this study is to compare the biomechanical characters of DHS, PFNA, and PFBN for fixation of BFNF. Methods Using finite element analysis, we created a three-dimensional model of the BFNF for this investigation. The PFBN group, the PFNA group and the DHS + DS group were our three test groups. For each fracture group, the von Mises stress and displacements of the femur and internal fixation components were measured under 2100 N axial loads. Results The PFBN group demonstrated the lowest stress on the implants, significantly lower than the PFNA and DHS + DS groups. In terms of stress on the implants, the PFBN group exhibited the best performance, with the lowest stress concentration at 112.0 MPa, followed by the PFNA group at 124.8 MPa and the DHS + DS group at 149.8 MPa. The PFBA group demonstrated the smallest displacement at the fracture interface, measuring 0.21 mm, coupled with a fracture interface pressure of 17.41 MPa, signifying excellent stability. Conclusions Compared with DHS and PFNA, PFBN has advantages in stress distribution and biological stability. We believe the concept of triangle fixation will be helpful to reduce femoral neck shortening associated with DHS and PFNA and thus improve the prognosis of BFNF.

Details

Language :
English
ISSN :
1749799X
Volume :
18
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Journal of Orthopaedic Surgery and Research
Publication Type :
Academic Journal
Accession number :
edsdoj.fae8f7859af943ab96b5a85a43365f31
Document Type :
article
Full Text :
https://doi.org/10.1186/s13018-023-04415-y