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International Orthopaedics

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01-03-2017 | Original Paper

Understanding wear in dual mobility total hip replacement: first generation explant wear patterns

Authors: Bertrand Boyer, Thomas Neri, Jean Geringer, Alexandre Di Iorio, Remi Philippot, Frederic Farizon

Published in: International Orthopaedics | Issue 3/2017

Abstract

Purpose

Dual mobility was introduced by Pr. G. Bousquet to improve the dislocation risk of total hip arthroplasty (THR). The wear mechanisms of this implant remain to be understood. Could enhanced explant wear analysis explain liner wear behaviour?

Methods

Sixty-six explanted liners were selected. Non-destructive 3D scanning and heat colour treatment allowed reporting wear patterns on both convex and concave sides of the liners.

Results

For many liners, liner convexity wear was found to be homogeneous, and linked to a longer implantation time. A few liners had signs of blocking of the convexity, leading to excessive internal damage. Intra prosthetic dislocations were found to only have internal circular wear without liner penetration.

Conclusion

Heat colour treatment showed its effectiveness for highlighting wear patterns. Optimal convexity mobility seemed to be leading to a longer implantation time, with decreased contact stresses on concavity. The retentive rim should have a distinct wear analysis.

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Title: Understanding wear in dual mobility total hip replacement: first generation explant wear patterns
Authors: Bertrand Boyer
Thomas Neri
Jean Geringer
Alexandre Di Iorio
Remi Philippot
Frederic Farizon
Publication date: 01-03-2017
Publisher: Springer Berlin Heidelberg
Published in: International Orthopaedics / Issue 3/2017
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI: https://doi.org/10.1007/s00264-016-3362-5

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Understanding wear in dual mobility total hip replacement: first generation explant wear patterns

Abstract

Purpose

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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