期刊
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
卷 106, 期 5, 页码 1897-1906出版社
WILEY
DOI: 10.1002/jbm.b.33991
关键词
hip replacement; edge loading; surgical positioning; wear; ceramic-on-ceramic
资金
- DePuy Synthes Joint Reconstruction (Leeds, UK)
- EPSRC Centre for Innovative Manufacturing in Medical Devices
- WELMEC, a Centre of Excellence in Medical Engineering - Wellcome Trust
- EPSRC [WT 088908/Z/09/Z]
- NIHR through senior investigator award
- NIHR through Leeds Musculoskeletal Biomedical Research Unit
- DePuy Synthes and Simulator Solutions
- DePuy Synthes
- EPSRC [EP/N00941X/1, EP/M028143/1, EP/K029592/1, EP/N02480X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [1369837, EP/N02480X/1, EP/N00941X/1, EP/M028143/1, EP/K029592/1] Funding Source: researchfish
- National Institute for Health Research [NF-SI-0611-10096] Funding Source: researchfish
The aim of this study was to develop a preclinical in vitro method to predict the occurrence and severity of edge loading condition associated with the dynamic separation of the centres of the head and cup (in the absence of impingement) for variations in surgical positioning of the cup. Specifically, this study investigated the effect of both the variations in the medial-lateral translational mismatch between the centres of the femoral head and acetabular cup and the variations in the cup inclination angles on the occurrence and magnitude of the dynamic separation, the severity of edge loading, and the wear rate of ceramic-on-ceramic hip replacement bearings in a multi-station hip joint simulator during a walking gait cycle. An increased mismatch between the centres of rotation of the femoral head and acetabular cup resulted in an increased level of dynamic separation and an increase in the severity of edge loading condition which led to increased wear rate in ceramic-on-ceramic bearings. Additionally for a given translational mismatch, an increase in the cup inclination angle gave rise to increased dynamic separation, worst edge loading conditions, and increased wear. To reduce the occurrence and severity of edge loading, the relative positions (the mismatch) of the centres of rotation of the head and the cup should be considered alongside the rotational position of the acetabular cup. This study has considered the combination of mechanical and tribological factors for the first time in the medial-lateral axis only, involving one rotational angle (inclination) and one translational mismatch. (c) 2017 The Authors Journal of Biomedical Materials Research Part B: Applied Biomaterials Published by Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1897-1906, 2018.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据