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The performance of mixed manufacturer metal on metal total hip replacements

The performance of mixed manufacturer metal on metal total hip replacements
The performance of mixed manufacturer metal on metal total hip replacements
Using a femoral head from one manufacturer on the stem of another manufacturer poses the risk that the taper interface between the components may not contact correctly and the performance of the joint will be impaired. The cohorts in this study are a combination of modular Birmingham Hip Resurfacing (BHR) and Adept femoral heads on CPT stems. The study reviews the geometry of the taper interfaces to establish if the taper clearance angles was outside of the normal range for other taper interfaces. In addition the rates of material loss from the bearings and taper and a ranking of the stem damage were reviewed to determine if the levels of loss were above that seen for other similar joints.
The material loss analysis demonstrated that the rates or levels of loss from the bearings, taper and stem were no different to levels published for manufacturer matched joints and in many cases were lower. The results demonstrate that the taper clearance angles for the mixed manufacturer joints (BHR-CPT: 0.067 to -0.116, Adept-CPT: 0.101 to -0.056) were within the range of other studies and manufacturer matched clearances (0.134 to -0.149).
Using components from different manufacturers has not in this instance increased the level of material loss from the joints, when compared to other similar manufacturer matched joints.
Hip replacement , Metal on Metal
2331-2270
1-8
Cook, Richard
06f8322d-81be-4f82-9326-19e55541c78f
Latham, Jeremy
c6c195b3-c4c3-41fd-b38f-0ae20dd52fd0
Wood, Robert
d9523d31-41a8-459a-8831-70e29ffe8a73
Cook, Richard
06f8322d-81be-4f82-9326-19e55541c78f
Latham, Jeremy
c6c195b3-c4c3-41fd-b38f-0ae20dd52fd0
Wood, Robert
d9523d31-41a8-459a-8831-70e29ffe8a73

Cook, Richard, Latham, Jeremy and Wood, Robert (2017) The performance of mixed manufacturer metal on metal total hip replacements. Reconstructive Review, 7 (2), 1-8. (doi:10.15438/rr.7.2.165).

Record type: Article

Abstract

Using a femoral head from one manufacturer on the stem of another manufacturer poses the risk that the taper interface between the components may not contact correctly and the performance of the joint will be impaired. The cohorts in this study are a combination of modular Birmingham Hip Resurfacing (BHR) and Adept femoral heads on CPT stems. The study reviews the geometry of the taper interfaces to establish if the taper clearance angles was outside of the normal range for other taper interfaces. In addition the rates of material loss from the bearings and taper and a ranking of the stem damage were reviewed to determine if the levels of loss were above that seen for other similar joints.
The material loss analysis demonstrated that the rates or levels of loss from the bearings, taper and stem were no different to levels published for manufacturer matched joints and in many cases were lower. The results demonstrate that the taper clearance angles for the mixed manufacturer joints (BHR-CPT: 0.067 to -0.116, Adept-CPT: 0.101 to -0.056) were within the range of other studies and manufacturer matched clearances (0.134 to -0.149).
Using components from different manufacturers has not in this instance increased the level of material loss from the joints, when compared to other similar manufacturer matched joints.

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More information

Accepted/In Press date: 1 June 2017
e-pub ahead of print date: 30 June 2017
Published date: June 2017
Keywords: Hip replacement , Metal on Metal

Identifiers

Local EPrints ID: 415738
URI: http://eprints.soton.ac.uk/id/eprint/415738
ISSN: 2331-2270
PURE UUID: db976132-322d-467c-8bc3-ef92aa633cc9
ORCID for Robert Wood: ORCID iD orcid.org/0000-0003-0681-9239

Catalogue record

Date deposited: 21 Nov 2017 17:31
Last modified: 18 Feb 2021 16:43

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Contributors

Author: Richard Cook
Author: Jeremy Latham
Author: Robert Wood ORCID iD

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