Favourable clinical outcomes following cemented arthroplasty after metal-on-metal total hip replacement: a retrospective
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RESEARCH ARTICLE
Open Access
Favourable clinical outcomes following cemented arthroplasty after metal-on-metal total hip replacement: a retrospective study with a mean follow-up of 10 years Weiguang Yu1†, Meiji Chen2†, Xianshang Zeng1, Mingdong Zhao3, Xinchao Zhang3, Junxing Ye4,5*, Jintao Zhuang6* and Guowei Han1*
Abstract Background: Given the unexpected high rate of failure following metal-on-metal total hip replacement (MoM-THR), it is expected that more MoM-THR patients will experience revision. The long-term outcomes regarding the primary MoM-THR revised to cemented THR (CTHR) remain controversial. The purpose of this retrospective review was to evaluate the long-term outcomes of patients who underwent conversion from MoM-THR to CTHR. Methods: A total of 220 patients (220 hips) who underwent a conversion of primary MoM-THR to CTHR from March 2006 to October 2016 were retrospectively reviewed. The primary outcomes were the functional outcomes assessed using the Harris hip scores (HHS) and major radiographic outcomes. Follow-ups occurred at 3 months, 6 months, 1 year, 2 years, and then every two years after revision. Results: Mean follow-up was 10.1 years (5–13 years). Distinct improvements were detected in the mean HHS between the preoperative and last follow-up analysis (62.35[±8.49] vs. 84.70[±14.68], respectively, p < 0.001). The key orthopaedic complication rate was 18.2% (27/148). Seven (4.7%) cases experienced a CTHR failure at a mean of 3.4 (±1.2) years after revision MoM-THR, mostly attributed to recurrent dislocation. Conclusion: CTHR might yield an acceptable functional score and a low rate of the key orthopaedic complications. Keywords: Revision, Metal-on-metal, Total hip replacement, Outcome, Cemented
* Correspondence: [email protected]; [email protected]; [email protected] † Weiugang Yu and Meiji Chen contributed equally to this work. 4 Department of Orthopaedics, The Affiliated Hospital of Jiangnan University, No. 1000, Hefeng Road, Binhu District, Wuxi 21400, Jiangsu, China 6 Department of Urinary surgery, The First Affiliated Hospital, Sun Yat-sen University, No. 58, Zhongshan 2nd Road, Yuexiu District, Guangzhou 510080, China 1 Department of Orthopaedics, The First Affiliated Hospital, Sun Yat-sen University, No. 58, Zhongshan 2nd Road, Yuexiu District, Guangzhou 510080, China Full list of author information is available at the end of the article © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is
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