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Materials
Volume 13
Issue 20
10.3390/ma13204589
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Article

Bearing Thickness Is Not a Predictive Factor for Damage and Penetration in Oxford Unicompartmental Knee Arthroplasty—A Retrieval Analysis

by
Johannes Adrian Eckert
†,
Ulrike Mueller
†,
Tilman Walker
,
Martin Schwarze
,
Sebastian Jaeger
and
Jan Philippe Kretzer
*
Laboratory of Biomechanics and Implant Research, Clinic for Orthopedics and Trauma Surgery, Heidelberg University Hospital, Schlierbacher Landstraße 200a, 69118 Heidelberg, Germany
*
Author to whom correspondence should be addressed.
†
These authors contributed equally.
Materials 2020, 13(20), 4589; https://doi.org/10.3390/ma13204589
Received: 19 August 2020 / Revised: 12 October 2020 / Accepted: 13 October 2020 / Published: 15 October 2020
(This article belongs to the Special Issue Novel Research about Biomechanics and Biomaterials Used in Hip, Knee and Related Joints)
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Abstract

The medial Oxford unicompartmental knee arthroplasty (OUKA) shows good survivorship, as well as clinical results. Aseptic loosening, however, remains one of the main reasons for revision and polyethylene debris is known to cause aseptic loosening. The role of bearing thickness in total as well as unicondylar knee arthroplasty has been the subject of controversial discussions, especially the longevity of lower thickness bearings in total knee arthroplasty was questioned. The purpose of this study was to assess the influence of bearing thickness on time to revision, damage pattern, penetration, and volumetric material loss. A cohort of 47 consecutively retrieved medial OUKA bearings was analyzed with conventional direct light microscopy applying the Hood damage analysis, as well as measuring the penetration depth. In this retrieval cohort, a difference on survival time, damage, penetration, as well as volumetric material loss could not be seen. We conclude that low as well as high thickness bearings can safely be used in OUKA without any relevant differences in terms of wear and damage. View Full-Text
Keywords: oxford unicompartmental knee arthroplasty; bearing thickness; retrieval analysis oxford unicompartmental knee arthroplasty; bearing thickness; retrieval analysis
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MDPI and ACS Style

Eckert, J.A.; Mueller, U.; Walker, T.; Schwarze, M.; Jaeger, S.; Kretzer, J.P. Bearing Thickness Is Not a Predictive Factor for Damage and Penetration in Oxford Unicompartmental Knee Arthroplasty—A Retrieval Analysis. Materials 2020, 13, 4589. https://doi.org/10.3390/ma13204589

AMA Style

Eckert JA, Mueller U, Walker T, Schwarze M, Jaeger S, Kretzer JP. Bearing Thickness Is Not a Predictive Factor for Damage and Penetration in Oxford Unicompartmental Knee Arthroplasty—A Retrieval Analysis. Materials. 2020; 13(20):4589. https://doi.org/10.3390/ma13204589

Chicago/Turabian Style

Eckert, Johannes A., Ulrike Mueller, Tilman Walker, Martin Schwarze, Sebastian Jaeger, and Jan P. Kretzer. 2020. "Bearing Thickness Is Not a Predictive Factor for Damage and Penetration in Oxford Unicompartmental Knee Arthroplasty—A Retrieval Analysis" Materials 13, no. 20: 4589. https://doi.org/10.3390/ma13204589

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