Wang Y, Ma JX, Bai HH, Lu B, Sun L, Jin HZ, Ma XL. Mechanical analysis of the femoral neck dynamic intersection system with different nail angles and clinical applications. World J Clin Cases 2023; 11(20): 4814-4823 [PMID: 37584003 DOI: 10.12998/wjcc.v11.i20.4814]
Corresponding Author of This Article
Xin-Long Ma, MD, Professor, Orthopaedics Institute, Tianjin Hospital, Tianjin University, Heping District Munan Road No. 155 Tianjin 300050, China. maxinlong@126.com
Research Domain of This Article
Orthopedics
Article-Type of This Article
Clinical and Translational Research
Open-Access Policy of This Article
This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
World J Clin Cases. Jul 16, 2023; 11(20): 4814-4823 Published online Jul 16, 2023. doi: 10.12998/wjcc.v11.i20.4814
Mechanical analysis of the femoral neck dynamic intersection system with different nail angles and clinical applications
Ying Wang, Jian-Xiong Ma, Hao-Hao Bai, Bin Lu, Lei Sun, Hong-Zhen Jin, Xin-Long Ma
Ying Wang, Jian-Xiong Ma, Hao-Hao Bai, Bin Lu, Lei Sun, Hong-Zhen Jin, Xin-Long Ma, Orthopaedics Institute, Tianjin Hospital, Tianjin University, Tianjin 300050, China
Author contributions: Wang Y, Ma JX and Bai HH contributed equally to this work; Wang Y, Ma JX, and Ma XL conceived the theme of study and drafted the manuscript; Wang Y and Bai HH recruited volunteers and collected CT data; Lu B and Sun L conducted three-dimensional model modeling and preprocessing; Jin HZ and Wang Y conducted finite element modeling and analysis; All authors have read and approved the final manuscript.
Supported byTianjin Science and Technology planning Project, No. 21JCQNJC01060; Key Project of Tianjin Natural Science Foundation, No. 22JCZDJC00340; and National Key Research and Development Project of China, No. 2022YFC3601904.
Institutional review board statement: The study was reviewed and approved by the Tianjin Hospital ethics committee [Approval NO.2023.023].
Conflict-of-interest statement: All authors declare that they have no conflict of interest.
Data sharing statement: The datasets are available from the corresponding author at maxinlong@126.com.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Xin-Long Ma, MD, Professor, Orthopaedics Institute, Tianjin Hospital, Tianjin University, Heping District Munan Road No. 155 Tianjin 300050, China. maxinlong@126.com
Received: May 11, 2023 Peer-review started: May 11, 2023 First decision: May 31, 2023 Revised: June 7, 2023 Accepted: June 25, 2023 Article in press: June 25, 2023 Published online: July 16, 2023
ARTICLE HIGHLIGHTS
Research background
The suitability of the 130° main nail angle design of the femoral neck dynamic intersection system (FNS) for Asian populations lacks relevant research reports.
Research motivation
To provide clinical guidance for the future treatment of femoral neck fracture and internal fixation optimization in Asian populations.
Research objectives
To compare the biomechanical stability differences in various FNS main nail angles for treating femoral neck fractures in Asian populations.
Research methods
FNS models with different nail angles were designed, and the femur computed tomography (CT) data of the Asian population were utilized for mechanical simulation analysis of FNS treatment for femoral neck fractures.
Research results
The magnitude of proximal femoral displacement during stress varied as follows: 130° FNS fixation group, < 125° FNS fixation group, < 120° FNS fixation group, < 135° FNS fixation group, and < 140° FNS fixation group. The stresses of FNS were as follows: 125° FNS fixation group, < 120° FNS fixation group, < 130° FNS fixation group, < 135° FNS fixation group, and < 140° FNS fixation group. The Von Mises stress on the femur was predominantly distributed in the femoral surgical neck and diaphysis, and the maximum stress values were: 125° FNS fixation group, < 120° FNS fixation group, < 130° FNS fixation group, < 140° FNS fixation group, and < 135° FNS fixation group.
Research conclusions
The main nail FNS angle of 130° has the best stability for treating femoral neck fractures in Asian populations with quantifiable stress distribution and minimal proximal femoral displacement.
Research perspectives
To gain a more comprehensive understanding of the mechanical properties of FNS with different main nail fixation angles, the type of fracture and the test in clinical or experimental can be added later.
