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Effects of implant positioning in cementless total hip replacements

Effects of implant positioning in cementless total hip replacements
Effects of implant positioning in cementless total hip replacements
Cementless Total Hip Replacements (THRs) are required to approximate as closely as possible the natural joint function for the full postoperative life span. Unfortunately, implant positioning is not always perfect due to the curved shape of the thigh bone and the stem is often straight [1]. Surgeons need to decide on three orientation angles that directly influence the success of a cementless THR: the antero/retro version of the femur neck orientation, implant varus/valgus placement and anterior/posterior orientation. Ideally, to account for positioning variability, all possible implant orientations should be analysed and simulated. Unfortunately, this would be an intractable task if it was attempted experimentally, and computational simulations are often applied to reduce this burden. However, even in computational pre-clinical assessments of implant primary stability, this is a huge task, as it involves generating a new mesh for each new position and solving the corresponding Finite Element (FE) problem [2]. In the current work, this problem is addressed using a mesh morphing-based framework that can efficiently assess the effects of implant positioning.
implant positioning, mesh morphing, contact, design of experiments, surrogate modelling
1025-5842
275-276
Bah, M.T.
b5cd0f47-016f-485c-8293-5f6bf8a7ef1a
Browne, Martin
6578cc37-7bd6-43b9-ae5c-77ccb7726397
Young, P.G.
e556a83d-89e8-41e8-8ee5-0fe774c74b66
Bryan, R.
4219f927-f651-445e-8550-37c7726a0a50
Xuan, V.B.
d5709e48-82c4-418c-b0da-70eb7f277700
Bah, M.T.
b5cd0f47-016f-485c-8293-5f6bf8a7ef1a
Browne, Martin
6578cc37-7bd6-43b9-ae5c-77ccb7726397
Young, P.G.
e556a83d-89e8-41e8-8ee5-0fe774c74b66
Bryan, R.
4219f927-f651-445e-8550-37c7726a0a50
Xuan, V.B.
d5709e48-82c4-418c-b0da-70eb7f277700

Bah, M.T., Browne, Martin, Young, P.G., Bryan, R. and Xuan, V.B. (2011) Effects of implant positioning in cementless total hip replacements. Computer Methods in Biomechanics and Biomedical Engineering, 14, supplement 1, 275-276.

Record type: Article

Abstract

Cementless Total Hip Replacements (THRs) are required to approximate as closely as possible the natural joint function for the full postoperative life span. Unfortunately, implant positioning is not always perfect due to the curved shape of the thigh bone and the stem is often straight [1]. Surgeons need to decide on three orientation angles that directly influence the success of a cementless THR: the antero/retro version of the femur neck orientation, implant varus/valgus placement and anterior/posterior orientation. Ideally, to account for positioning variability, all possible implant orientations should be analysed and simulated. Unfortunately, this would be an intractable task if it was attempted experimentally, and computational simulations are often applied to reduce this burden. However, even in computational pre-clinical assessments of implant primary stability, this is a huge task, as it involves generating a new mesh for each new position and solving the corresponding Finite Element (FE) problem [2]. In the current work, this problem is addressed using a mesh morphing-based framework that can efficiently assess the effects of implant positioning.

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More information

e-pub ahead of print date: 24 August 2011
Published date: August 2011
Keywords: implant positioning, mesh morphing, contact, design of experiments, surrogate modelling
Organisations: Bioengineering Group

Identifiers

Local EPrints ID: 208657
URI: https://eprints.soton.ac.uk/id/eprint/208657
ISSN: 1025-5842
PURE UUID: 3d2463d2-aa21-420c-a13b-934bd5dffb86
ORCID for Martin Browne: ORCID iD orcid.org/0000-0001-5184-050X

Catalogue record

Date deposited: 23 Jan 2012 12:03
Last modified: 06 Jun 2018 13:03

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