Finite element analysis of six distinct fixation devices for vertically oriented femoral neck fractures.

IF 1.3 4区医学 Q4 ENGINEERING, BIOMEDICAL

Bio-medical materials and engineering Pub Date : 2026-03-01 Epub Date: 2026-01-19 DOI:10.1177/09592989251414222

Yen-Nien Chen, Hsin-Chuan Chen, Chang-Han Chuang, Chih-Wei Chang, Yu-Hsuan Chung

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引用次数: 0

Abstract

Background: Vertically oriented femoral neck fractures are a challenge for orthopedic surgeons, and the complication rates are also high. Recently, several innovative devices have been proposed, such as the proximal femoral bionic nail, InterTAN, and medial buttress plate combined with cannulated screws, to increase the stability of fixation. However, the differences among these innovative devices need to be addressed.

Objective: This study aimed to compare the stability of the proximal femoral bionic nail, InterTAN, and medial buttress plate combined with cannulated screws for vertically oriented femoral neck fractures. Additionally, traditional fixation devices-including three parallel cannulated screws, a compression hip screw system, and a proximal femoral nail-were included for comparison, resulting in a total of six distinct devices evaluated in this study.

Methods: A finite element model of a femoral neck fracture fixed with the six internal fixation devices was created. Furthermore, two different fracture conditions-with and without a 1-mm fracture gap-were considered. The maximum loading during level walking was applied to the model for comparison.

Results: The results indicated that the InterTAN has the best ability to maintain the gap and prevent collapse. Under the fracture gap condition, the peak displacement of the femoral head was smaller in the innovative devices compared to the traditional ones. Specifically, the peak displacements were 1.98 mm for the medial buttress plate combined with cannulated screws, 2.12 mm for the proximal femoral bionic nail, and 1.16 mm for the InterTAN system. The von Mises stress in the medial buttress plate was also the highest among the devices, with values of 1000 MPa with the gap and 1477 MPa without the gap.

Conclusion: Based on the present results, the medial buttress plate combined with cannulated screws, proximal femoral bionic nail, and InterTAN are recommended for cases without a fracture gap, while the InterTAN is recommended for cases with a fracture gap to prevent bone shortening.

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垂直定向股骨颈骨折六种不同固定装置的有限元分析。

背景：垂直定向股骨颈骨折是骨科医生面临的一个挑战，其并发症发生率也很高。最近，一些创新装置被提出，如股骨近端仿生钉、InterTAN和内侧支撑板联合空心螺钉，以增加固定的稳定性。然而，这些创新设备之间的差异需要解决。目的：本研究旨在比较股骨近端仿生钉、InterTAN和内侧支撑钢板联合空心螺钉治疗垂直定向股骨颈骨折的稳定性。此外，传统的固定装置——包括三个平行空心螺钉、一个髋关节加压螺钉系统和一个股骨近端钉——被纳入比较，结果在本研究中总共评估了六种不同的装置。方法：建立6种内固定装置固定股骨颈骨折的有限元模型。此外，还考虑了两种不同的断裂条件——有和没有1毫米裂缝间隙。将水平行走时的最大负荷应用于模型进行比较。结果：InterTAN具有最佳的维持间隙和防止塌陷的能力。在骨折间隙条件下，与传统装置相比，创新装置的股骨头峰值位移更小。具体来说，内侧支撑板联合空心螺钉的峰值位移为1.98 mm，股骨近端仿生钉的峰值位移为2.12 mm， InterTAN系统的峰值位移为1.16 mm。中间支板的von Mises应力也最大，有间隙时为1000 MPa，无间隙时为1477 MPa。结论：在本研究的基础上，对于无骨折间隙的病例，推荐使用内侧支撑钢板联合空心螺钉、股骨近端仿生钉、InterTAN，对于有骨折间隙的病例，推荐使用InterTAN防止骨缩短。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bio-medical materials and engineering 工程技术-材料科学：生物材料

CiteScore

1.80

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： The aim of Bio-Medical Materials and Engineering is to promote the welfare of humans and to help them keep healthy. This international journal is an interdisciplinary journal that publishes original research papers, review articles and brief notes on materials and engineering for biological and medical systems. Articles in this peer-reviewed journal cover a wide range of topics, including, but not limited to: Engineering as applied to improving diagnosis, therapy, and prevention of disease and injury, and better substitutes for damaged or disabled human organs; Studies of biomaterial interactions with the human body, bio-compatibility, interfacial and interaction problems; Biomechanical behavior under biological and/or medical conditions; Mechanical and biological properties of membrane biomaterials; Cellular and tissue engineering, physiological, biophysical, biochemical bioengineering aspects; Implant failure fields and degradation of implants. Biomimetics engineering and materials including system analysis as supporter for aged people and as rehabilitation; Bioengineering and materials technology as applied to the decontamination against environmental problems; Biosensors, bioreactors, bioprocess instrumentation and control system; Application to food engineering; Standardization problems on biomaterials and related products; Assessment of reliability and safety of biomedical materials and man-machine systems; and Product liability of biomaterials and related products.