Finite element analysis of sliding vs static configuration of partial threaded cannulated compression screws for Pauwels type III fracture neck of femur

Q2 Medicine

Journal of Clinical Orthopaedics and Trauma Pub Date : 2025-04-19 DOI:10.1016/j.jcot.2025.103024

Amit Kumar , Somesh Kumar , Ajeet Kumar , Kumar Keshav , Anurag Baghel , Pulak Sharma

{"title":"Finite element analysis of sliding vs static configuration of partial threaded cannulated compression screws for Pauwels type III fracture neck of femur","authors":"Amit Kumar , Somesh Kumar , Ajeet Kumar , Kumar Keshav , Anurag Baghel , Pulak Sharma","doi":"10.1016/j.jcot.2025.103024","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><div>Cannulated Cancellous Screws fixation is done either as a sliding or static configuration according to the number, thread length and orientation of the screws. This study aims to compare the biomechanical properties of 3-CCS as sliding configuration and BDSF & 4-CCS (Alpha configuration) as static configuration, by finite element analysis for Pauwels type III fracture neck of femur.</div></div><div><h3>Methods</h3><div>DICOM format images of saw-bone were used to build the 3-D geometric models, which were hypermeshed to create models of Pauwels type III FNF with an angle of 65°. CAD models of three configurations were created as per AO specifications and analysed for stress distribution of bone & implant, relative displacement between fracture planes & stiffness.</div></div><div><h3>Results</h3><div>The peak stress at the fracture surface was found to be low in 4-CCS, which promotes fracture healing. 4-CCS had a decreased chance of failure due to lower implant stress and fracture surface displacement, indicating improved length stability. Overall, 4-CCS had the maximum construct stiffness, indicating a stable and rigid fixation.</div></div><div><h3>Conclusion</h3><div>The static configuration of 4-CCS showed superior biomechanical properties in terms of low stress of bone & implant, and lower relative displacement of the fracture surface with high construct stiffness over other configurations. So, 4-CCS (Alpha configuration) should be the preferred configuration for the Pauwels type III FNF.</div></div>","PeriodicalId":53594,"journal":{"name":"Journal of Clinical Orthopaedics and Trauma","volume":"66 ","pages":"Article 103024"},"PeriodicalIF":0.0000,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Clinical Orthopaedics and Trauma","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0976566225001213","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Medicine","Score":null,"Total":0}

引用次数: 0

Abstract

Background

Cannulated Cancellous Screws fixation is done either as a sliding or static configuration according to the number, thread length and orientation of the screws. This study aims to compare the biomechanical properties of 3-CCS as sliding configuration and BDSF & 4-CCS (Alpha configuration) as static configuration, by finite element analysis for Pauwels type III fracture neck of femur.

Methods

DICOM format images of saw-bone were used to build the 3-D geometric models, which were hypermeshed to create models of Pauwels type III FNF with an angle of 65°. CAD models of three configurations were created as per AO specifications and analysed for stress distribution of bone & implant, relative displacement between fracture planes & stiffness.

Results

The peak stress at the fracture surface was found to be low in 4-CCS, which promotes fracture healing. 4-CCS had a decreased chance of failure due to lower implant stress and fracture surface displacement, indicating improved length stability. Overall, 4-CCS had the maximum construct stiffness, indicating a stable and rigid fixation.

Conclusion

The static configuration of 4-CCS showed superior biomechanical properties in terms of low stress of bone & implant, and lower relative displacement of the fracture surface with high construct stiffness over other configurations. So, 4-CCS (Alpha configuration) should be the preferred configuration for the Pauwels type III FNF.

查看原文本刊更多论文

保韦尔斯III型股骨颈骨折部分螺纹空心加压螺钉滑动与静态配置的有限元分析

背景空心松质螺钉根据螺钉的数量、螺纹长度和方向可采用滑动或静态固定方式。本研究旨在比较3-CCS作为滑动构型和BDSF的生物力学性能；4-CCS （Alpha配置）作为静态配置，对Pauwels III型股骨颈骨折进行有限元分析。方法采用dicom格式的锯骨图像建立三维几何模型，并对模型进行超网格化处理，建立角度为65°的Pauwels III型FNF模型。按照AO规范建立了三种构型的CAD模型，并对骨的应力分布进行了分析；植入物，骨折面间相对位移&；刚度。结果4-CCS能降低骨折面峰值应力，促进骨折愈合。由于植入物应力和骨折表面位移较低，4-CCS的失效几率降低，表明长度稳定性提高。总体而言，4-CCS具有最大的构造刚度，表明固定稳定且刚性。结论4-CCS静态结构具有较好的生物力学性能，具有较低的骨应力；与其他结构相比，具有较高的结构刚度，并且骨折面相对位移较小。因此，4-CCS （Alpha配置）应该是Pauwels III型FNF的首选配置。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Clinical Orthopaedics and Trauma Medicine-Orthopedics and Sports Medicine

CiteScore

4.30

自引率

0.00%

发文量

181

审稿时长

92 days

期刊介绍： Journal of Clinical Orthopaedics and Trauma (JCOT) aims to provide its readers with the latest clinical and basic research, and informed opinions that shape today''s orthopedic practice, thereby providing an opportunity to practice evidence-based medicine. With contributions from leading clinicians and researchers around the world, we aim to be the premier journal providing an international perspective advancing knowledge of the musculoskeletal system. JCOT publishes content of value to both general orthopedic practitioners and specialists on all aspects of musculoskeletal research, diagnoses, and treatment. We accept following types of articles: • Original articles focusing on current clinical issues. • Review articles with learning value for professionals as well as students. • Research articles providing the latest in basic biological or engineering research on musculoskeletal diseases. • Regular columns by experts discussing issues affecting the field of orthopedics. • "Symposia" devoted to a single topic offering the general reader an overview of a field, but providing the specialist current in-depth information. • Video of any orthopedic surgery which is innovative and adds to present concepts. • Articles emphasizing or demonstrating a new clinical sign in the art of patient examination is also considered for publication. Contributions from anywhere in the world are welcome and considered on their merits.