tailieunhanh - báo cáo hóa học:" Stem diameter and rotational stability in revision total hip arthroplasty: a biomechanical analysis"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Stem diameter and rotational stability in revision total hip arthroplasty: a biomechanical analysis | Journal of Orthopaedic Surgery and Research BioMed Central Research article Stem diameter and rotational stability in revision total hip arthroplasty a biomechanical analysis R Michael Meneghini 1 Nadim J Hallab2 Richard A Berger2 Joshua J Jacobs2 Wayne G Paprosky2 and Aaron G Rosenberg2 Open Access Address 1Joint Replacement Surgeons of Indiana Research Foundation St. Vincent Center for Joint Replacement Indianapolis IN USA and 2Department of Orthopaedic Surgery Rush Medical College Rush University Medical Center Chicago IL USA Email R Michael Meneghini - rm_meneghini@ Nadim J Hallab - nhallab@ Richard A Berger - Joshua J Jacobs - Wayne G Paprosky - parp1210@ Aaron G Rosenberg - aarongbone@ Corresponding author Published 02 October 2006 Received 05 January 2006 Journal of Orthopaedic Surgery and Research 2006 1 5 doi 1749-799X-1-5 Accepted 02 October 2006 This article is available from http content 1 1 5 2006 Meneghini et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Proximal femoral bone loss during revision hip arthroplasty often requires bypassing the deficient metaphyseal bone to obtain distal fixation. The purpose of this study was to determine the effect of stem diameter and length of diaphyseal contact in achieving rotational stability in revision total hip arthroplasty. Methods Twenty-four cadaveric femoral specimens were implanted with a fully porous-coated stem. Two different diameters were tested and the stems were implanted at multiple contact lengths without proximal bone support. Each specimen underwent torsional testing to failure and rotational micromotion was measured at