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Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Patient and surgery related factors associated with fatigue type polyethylene wear on 49 PCA and DURACON retrievals at autopsy and revision | Journal of Orthopaedic Surgery and Research BioMed Central Open Access Research article Patient and surgery related factors associated with fatigue type polyethylene wear on 49 PCA and DURACON retrievals at autopsy and revision Markus Rohrbach Martin Luemt and Peter E Ochsner Address Kantonsspital Liestal Orthopaedic Department Rheinstrasse 26 4410 Liestal Switzerland Email Markus Rohrbach - rohrbach@beachers.ch Martin Luem - martin.lueem@ksli.ch Peter E Ochsner - peter.ochsner@hin.ch Corresponding author tEqual contributors Published 22 February 2008 Received 26 February 2007 Journal of Orthopaedic Surgery and Research 2008 3 8 doi 10.1186 1749-799X-3-8 Accepted 22 February 2008 This article is available from http www.josr-online.cOm content 3 1 8 2008 Rohrbach et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http creativecommons.org licenses by 2.0 which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Polyethylene wear is an important factor for longevity of total knee arthroplasty. Proven and suspicious factors causing wear can be grouped as material patient and surgery related. There are more studies correlating design and or biomaterial factors to in vivo wear than those to patient and surgery related factors. Many retrieval studies just include revision implants and therefore may not be representative. This study is aimed to correlate patient- and surgery- related factors to visual wear score by minimizing design influence and include both autopsy and revision implants. Comparison between the groups was expected to unmask patient and surgery-related factors responsible for wear. Methods The amount of joint side wear on polyethylene retrievals was measured using a modification of an established visual wear score. Fatigue type wear was defined as summation of the most severe wear modes of
