UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

There Is A Relationship Between The In Vivo Force Acting On A Metal-On-Metal Hip Implant And The Point Within The Acetabular Cup With The Largest Wear Scar: A Novel Retrieval Study Using 3D CT, Mathematical Modelling and In Vivo Data

Govind, G; Henckel, J; Taylor, S; Mcmillan, R; Hart, A; Skinner, J; (2014) There Is A Relationship Between The In Vivo Force Acting On A Metal-On-Metal Hip Implant And The Point Within The Acetabular Cup With The Largest Wear Scar: A Novel Retrieval Study Using 3D CT, Mathematical Modelling and In Vivo Data. Presented at: 15th EFORT Congress 2014, London, UK. Green open access

[img]
Preview
Text
EFORT_GG.pdf

Download (286kB) | Preview

Abstract

The human hip joint is important, both in health and disease. Its range of motion is remarkable, and thus the loads transferred through the hip can be highly variable, depending on the patient’s activity. Investigation of retrieved hip implants can give us insight into multidirectional forces and its role in implant failure. The current theory of “edge loading” has shown a quantitative relationship between the location of the primary wear scar (WS1) at the edge and the wear volume. A regression analysis of hip force data (www.ORTHOLOAD.com) was used to find lever arms LLA and GLA for these subjects, assumed equal to those for our retrievals. See below for source of other data. This allowed the 2D Free body force system to be solved for the hip and abductor forces. Using the SPSS Statistics package, the Pearson’s correlation was calculated between: 1)The resultant hip joint reaction force and the wear angle 2)The resultant abductor force and the wear angle. These were 0.634 (p=0.036) and 0.611 (p=0.046) respectively. A negative wear angle represented a WS1 posterior to the COF and a positive wear angle represented a WS1 anterior to the COF, hence the more positive the wear angle, the more anterior it was. An increase in in vivo abductor and hip joint reaction force: does not lead to edge wear results in a more positive wear angle results in a WS1 that is more anterior in the coronal plane This pilot study suggests that: anterior wear may be an important factor in enabling clinicians to make thoughtful predictions about implant failure in patients

Type: Conference item (Presentation)
Title: There Is A Relationship Between The In Vivo Force Acting On A Metal-On-Metal Hip Implant And The Point Within The Acetabular Cup With The Largest Wear Scar: A Novel Retrieval Study Using 3D CT, Mathematical Modelling and In Vivo Data
Event: 15th EFORT Congress 2014
Location: London, UK
Dates: 04 June 2014 - 06 June 2014
Open access status: An open access version is available from UCL Discovery
Publisher version: https://www.efort.org/london2014/
Language: English
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Ortho and MSK Science
URI: https://discovery.ucl.ac.uk/id/eprint/1434265
Downloads since deposit
10Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item