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Malposition is main cause of failure of Oxford mobile-bearing medial unicompartmental knee arthroplasty: a retrospective study with minimum five-year follow-up
AIMS: Unicompartmental knee arthroplasty (UKA) is the preferred treatment for anterior medial knee osteoarthritis (OA) owing to the rapid postoperative recovery. However, the risk factors for UKA failure remain controversial. METHODS: The clinical data of Oxford mobile-bearing UKAs performed between...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The British Editorial Society of Bone & Joint Surgery
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10689062/ https://www.ncbi.nlm.nih.gov/pubmed/38035610 http://dx.doi.org/10.1302/2633-1462.412.BJO-2023-0135.R1 |
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author | Sang, Weilin Qiu, Hongjiu Xu, Ying Pan, Yuqin Ma, Jinzhong Zhu, Libo |
author_facet | Sang, Weilin Qiu, Hongjiu Xu, Ying Pan, Yuqin Ma, Jinzhong Zhu, Libo |
author_sort | Sang, Weilin |
collection | PubMed |
description | AIMS: Unicompartmental knee arthroplasty (UKA) is the preferred treatment for anterior medial knee osteoarthritis (OA) owing to the rapid postoperative recovery. However, the risk factors for UKA failure remain controversial. METHODS: The clinical data of Oxford mobile-bearing UKAs performed between 2011 and 2017 with a minimum follow-up of five years were retrospectively analyzed. Demographic, surgical, and follow-up data were collected. The Cox proportional hazards model was used to identify the risk factors that contribute to UKA failure. Kaplan-Meier survival was used to compare the effect of the prosthesis position on UKA survival. RESULTS: A total of 407 patients who underwent UKA were included in the study. The mean age of patients was 61.8 years, and the mean follow-up period of the patients was 91.7 months. The mean Knee Society Score (KSS) preoperatively and at the last follow-up were 64.2 and 89.7, respectively (p = 0.001). Overall, 28 patients (6.9%) with UKA underwent revision due to prosthesis loosening (16 patients), dislocation (eight patients), and persistent pain (four patients). Cox proportional hazards model analysis identified malposition of the prostheses as a high-risk factor for UKA failure (p = 0.007). Kaplan-Meier analysis revealed that the five-year survival rate of the group with malposition was 85.1%, which was significantly lower than that of the group with normal position (96.2%; p < 0.001). CONCLUSION: UKA constitutes an effective method for treating anteromedial knee OA, with an excellent five-year survival rate. Aseptic loosening caused by prosthesis malposition was identified as the main cause of UKA failure. Surgeons should pay close attention to prevent the potential occurrence of this problem. Cite this article: Bone Jt Open 2023;4(12):914–922. |
format | Online Article Text |
id | pubmed-10689062 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | The British Editorial Society of Bone & Joint Surgery |
record_format | MEDLINE/PubMed |
spelling | pubmed-106890622023-12-01 Malposition is main cause of failure of Oxford mobile-bearing medial unicompartmental knee arthroplasty: a retrospective study with minimum five-year follow-up Sang, Weilin Qiu, Hongjiu Xu, Ying Pan, Yuqin Ma, Jinzhong Zhu, Libo Bone Jt Open Knee AIMS: Unicompartmental knee arthroplasty (UKA) is the preferred treatment for anterior medial knee osteoarthritis (OA) owing to the rapid postoperative recovery. However, the risk factors for UKA failure remain controversial. METHODS: The clinical data of Oxford mobile-bearing UKAs performed between 2011 and 2017 with a minimum follow-up of five years were retrospectively analyzed. Demographic, surgical, and follow-up data were collected. The Cox proportional hazards model was used to identify the risk factors that contribute to UKA failure. Kaplan-Meier survival was used to compare the effect of the prosthesis position on UKA survival. RESULTS: A total of 407 patients who underwent UKA were included in the study. The mean age of patients was 61.8 years, and the mean follow-up period of the patients was 91.7 months. The mean Knee Society Score (KSS) preoperatively and at the last follow-up were 64.2 and 89.7, respectively (p = 0.001). Overall, 28 patients (6.9%) with UKA underwent revision due to prosthesis loosening (16 patients), dislocation (eight patients), and persistent pain (four patients). Cox proportional hazards model analysis identified malposition of the prostheses as a high-risk factor for UKA failure (p = 0.007). Kaplan-Meier analysis revealed that the five-year survival rate of the group with malposition was 85.1%, which was significantly lower than that of the group with normal position (96.2%; p < 0.001). CONCLUSION: UKA constitutes an effective method for treating anteromedial knee OA, with an excellent five-year survival rate. Aseptic loosening caused by prosthesis malposition was identified as the main cause of UKA failure. Surgeons should pay close attention to prevent the potential occurrence of this problem. Cite this article: Bone Jt Open 2023;4(12):914–922. The British Editorial Society of Bone & Joint Surgery 2023-12-01 /pmc/articles/PMC10689062/ /pubmed/38035610 http://dx.doi.org/10.1302/2633-1462.412.BJO-2023-0135.R1 Text en © 2023 Ma et al. https://creativecommons.org/licenses/by-nc-nd/4.0/https://online.boneandjoint.org.uk/TDMThis is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (CC BY-NC-ND 4.0) licence, which permits the copying and redistribution of the work only, and provided the original author and source are credited. See https://creativecommons.org/licenses/by-nc-nd/4.0/ |
spellingShingle | Knee Sang, Weilin Qiu, Hongjiu Xu, Ying Pan, Yuqin Ma, Jinzhong Zhu, Libo Malposition is main cause of failure of Oxford mobile-bearing medial unicompartmental knee arthroplasty: a retrospective study with minimum five-year follow-up |
title | Malposition is main cause of failure of Oxford mobile-bearing medial unicompartmental knee arthroplasty: a retrospective study with minimum five-year follow-up |
title_full | Malposition is main cause of failure of Oxford mobile-bearing medial unicompartmental knee arthroplasty: a retrospective study with minimum five-year follow-up |
title_fullStr | Malposition is main cause of failure of Oxford mobile-bearing medial unicompartmental knee arthroplasty: a retrospective study with minimum five-year follow-up |
title_full_unstemmed | Malposition is main cause of failure of Oxford mobile-bearing medial unicompartmental knee arthroplasty: a retrospective study with minimum five-year follow-up |
title_short | Malposition is main cause of failure of Oxford mobile-bearing medial unicompartmental knee arthroplasty: a retrospective study with minimum five-year follow-up |
title_sort | malposition is main cause of failure of oxford mobile-bearing medial unicompartmental knee arthroplasty: a retrospective study with minimum five-year follow-up |
topic | Knee |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10689062/ https://www.ncbi.nlm.nih.gov/pubmed/38035610 http://dx.doi.org/10.1302/2633-1462.412.BJO-2023-0135.R1 |
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