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BioMed Research International
Volume 2014 (2014), Article ID 931537, 7 pages
http://dx.doi.org/10.1155/2014/931537
Clinical Study

Greater Trochanteric Fixation Using a Cable System for Partial Hip Arthroplasty: A Clinical and Finite Element Analysis

1Department of Orthopedics and Traumatology, Kayseri Training and Research Hospital, 38010 Kayseri, Turkey
2Department of Orthopedics and Traumatology, İzmir Bozyaka Training and Research Hospital, 35110 İzmir, Turkey
3Department of Mechanical Engineering, Faculty of Engineering, Ege University, 35040 İzmir, Turkey

Received 28 April 2014; Revised 8 July 2014; Accepted 11 July 2014; Published 10 August 2014

Academic Editor: Radovan Zdero

Copyright © 2014 Fırat Ozan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aim of the study was to investigate the efficacy of greater trochanteric fixation using a multifilament cable to ensure abductor lever arm continuity in patients with a proximal femoral fracture undergoing partial hip arthroplasty. Mean age of the patients (12 men, 20 women) was 84.12 years. Mean follow-up was 13.06 months. Fixation of the dislocated greater trochanter with or without a cable following load application was assessed by finite element analysis (FEA). Radiological evaluation was based on the distance between the fracture and the union site. Harris hip score was used to evaluate final results: outcomes were excellent in 7 patients (21.8%), good in 17 patients (53.1%), average in 5 patients (15.6%), and poor in 1 patient (9.3%). Mean abduction angle was 20.21°. Union was achieved in 14 patients (43.7%), fibrous union in 12 (37.5%), and no union in 6 (18.7%). FEA showed that the maximum total displacement of the greater trochanter decreased when the fractured bone was fixed with a cable. As the force applied to the cable increased, the displacement of the fractured trochanter decreased. This technique ensures continuity of the abductor lever arm in patients with a proximal femoral fracture who are undergoing partial hip arthroplasty surgery.