A biomechanical investigation of the effects of static fixation and dynamization after interlocking femoral nailing: a finite element study

The Journal of Trauma and Acute Care Surgery
Kao-Shang ShihTzu-Pin Hsu

Abstract

Interlocking nail systems have been widely used to treat long bone fractures. The use of an interlocking nail system with a static fixation technique or a dynamic fixation technique was evaluated according to the outcomes of clinical applications. The biomechanical characteristics of dynamic fixation techniques are unclear, and the surgical rule, involving the removal of the locking screws farthest from the fracture site, is based mainly on surgeons' experiences. There has been no study that investigated the biomechanical characteristics of dynamic fixation techniques and the validity of this surgical rule. Three-dimensional nonlinear finite element models were developed. The conventional static fixation technique and two types of dynamic fixation techniques (removal of the proximal screw or removal of the distal screws) for the repair of two types of fractures (a proximal femoral fracture or a distal femoral fracture) are discussed. The results show that the dynamic fixation techniques could significantly reduce the stress exerted by the interlocking nail system and produce a greater contact pressure at the fracture site as compared with that of the static fixation technique. The interlocking nail system with removal of the di...Continue Reading

References

Mar 1, 1996·Clinical Orthopaedics and Related Research·R J Brumback
Mar 31, 1999·Medical Engineering & Physics·C J WangP Procter
Sep 6, 2001·Clinical Biomechanics·W Widjaja, C Hartung
Feb 8, 2002·The Orthopedic Clinics of North America·George V RussellMichael Zlowodzki
Feb 17, 2005·International Orthopaedics·D TiganiS Boriani
Feb 4, 2006·The Journal of Trauma·Anastasios D KanellopoulosPanayiotis N Soucacos
Aug 18, 2006·Journal of Orthopaedic Surgery·A K BhatK Bhaskaranand
Jan 4, 2007·Journal of Orthopaedic Surgery·K N Acharya, M R Rao
Oct 20, 2007·Clinical Biomechanics·Kao-Shang ShihShang-Chih Lin

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Citations

Aug 31, 2016·Orthopedics·Josh VaughnChristopher T Born
Jul 21, 2017·Bulletin of Experimental Biology and Medicine·V E DubrovA V Yudin
Jun 30, 2019·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Scott M TuckerGregory S Lewis

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