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Medial Unicompartmental Knee Arthroplasty in Patients with Spontaneous Osteonecrosis of the Knee

BACKGROUND: We analyzed the clinical and radiologic results of patients with spontaneous osteonecrosis of the knee treated by minimally invasive medial unicompartmental arthroplasty using Oxford Uni. METHODS: We reviewed 22 knees in 21 patients which were treated for spontaneous osteonecrosis betwee...

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Autores principales: Choy, Won-Sik, Kim, Kap Jung, Lee, Sang Ki, Yang, Dae Suk, Kim, Choon Myeon, Park, Ju Sang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Korean Orthopaedic Association 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3232355/
https://www.ncbi.nlm.nih.gov/pubmed/22162790
http://dx.doi.org/10.4055/cios.2011.3.4.279
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author Choy, Won-Sik
Kim, Kap Jung
Lee, Sang Ki
Yang, Dae Suk
Kim, Choon Myeon
Park, Ju Sang
author_facet Choy, Won-Sik
Kim, Kap Jung
Lee, Sang Ki
Yang, Dae Suk
Kim, Choon Myeon
Park, Ju Sang
author_sort Choy, Won-Sik
collection PubMed
description BACKGROUND: We analyzed the clinical and radiologic results of patients with spontaneous osteonecrosis of the knee treated by minimally invasive medial unicompartmental arthroplasty using Oxford Uni. METHODS: We reviewed 22 knees in 21 patients which were treated for spontaneous osteonecrosis between 2002 and 2006. Patients included one male and 20 females. The mean age was 70.8 years (range, 53 to 82 years). The mean follow-up period was 70.3 months (range, 48 to 93 months). The clinical results were evaluated using the Hospital for Special Surgery (HSS) knee score and the range of motion of the knee preoperatively and at the final follow-up. Preoperative plain radiographs and magnetic resonance images were analyzed to determine the size and stage of osteonecrotic lesions. RESULTS: The mean HSS knee score was 64.3 (range, 54 to 75) preoperatively and 92.0 (range, 71 to 100) at the final follow-up. The mean preoperative flexion contracture was 8.9° (range, 0 to 15°) and 0.2° (range, 0 to 5°) at the final follow-up. The mean further flexion increased from 138.6° (range, 100 to 145°) preoperatively to 145.6° (range, 140 to 150°) at the final follow-up. Active full flexion was possible within 2 months of the operation. The squatting position was possible in 16 patients (84.2%) out of 19, except one case of bronchiectasis and one case of spine fracture. The cross-leg posture was possible in 19 patients (90.5%) out of 21. The mean tibiofemoral angle was improved from varus 0.98° to valgus 3.22°. Meniscal bearing dislocation occurred in 2 cases and femoral component loosening occurred in 1 case. CONCLUSIONS: Unicompartmental knee arthroplasty using Oxford Uni could be an alternative treatment option in spontaneous osteonecrosis of the knee.
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spelling pubmed-32323552011-12-08 Medial Unicompartmental Knee Arthroplasty in Patients with Spontaneous Osteonecrosis of the Knee Choy, Won-Sik Kim, Kap Jung Lee, Sang Ki Yang, Dae Suk Kim, Choon Myeon Park, Ju Sang Clin Orthop Surg Original Article BACKGROUND: We analyzed the clinical and radiologic results of patients with spontaneous osteonecrosis of the knee treated by minimally invasive medial unicompartmental arthroplasty using Oxford Uni. METHODS: We reviewed 22 knees in 21 patients which were treated for spontaneous osteonecrosis between 2002 and 2006. Patients included one male and 20 females. The mean age was 70.8 years (range, 53 to 82 years). The mean follow-up period was 70.3 months (range, 48 to 93 months). The clinical results were evaluated using the Hospital for Special Surgery (HSS) knee score and the range of motion of the knee preoperatively and at the final follow-up. Preoperative plain radiographs and magnetic resonance images were analyzed to determine the size and stage of osteonecrotic lesions. RESULTS: The mean HSS knee score was 64.3 (range, 54 to 75) preoperatively and 92.0 (range, 71 to 100) at the final follow-up. The mean preoperative flexion contracture was 8.9° (range, 0 to 15°) and 0.2° (range, 0 to 5°) at the final follow-up. The mean further flexion increased from 138.6° (range, 100 to 145°) preoperatively to 145.6° (range, 140 to 150°) at the final follow-up. Active full flexion was possible within 2 months of the operation. The squatting position was possible in 16 patients (84.2%) out of 19, except one case of bronchiectasis and one case of spine fracture. The cross-leg posture was possible in 19 patients (90.5%) out of 21. The mean tibiofemoral angle was improved from varus 0.98° to valgus 3.22°. Meniscal bearing dislocation occurred in 2 cases and femoral component loosening occurred in 1 case. CONCLUSIONS: Unicompartmental knee arthroplasty using Oxford Uni could be an alternative treatment option in spontaneous osteonecrosis of the knee. The Korean Orthopaedic Association 2011-12 2011-12-01 /pmc/articles/PMC3232355/ /pubmed/22162790 http://dx.doi.org/10.4055/cios.2011.3.4.279 Text en Copyright © 2011 by The Korean Orthopaedic Association http://creativecommons.org/licenses/by-nc/3.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Choy, Won-Sik
Kim, Kap Jung
Lee, Sang Ki
Yang, Dae Suk
Kim, Choon Myeon
Park, Ju Sang
Medial Unicompartmental Knee Arthroplasty in Patients with Spontaneous Osteonecrosis of the Knee
title Medial Unicompartmental Knee Arthroplasty in Patients with Spontaneous Osteonecrosis of the Knee
title_full Medial Unicompartmental Knee Arthroplasty in Patients with Spontaneous Osteonecrosis of the Knee
title_fullStr Medial Unicompartmental Knee Arthroplasty in Patients with Spontaneous Osteonecrosis of the Knee
title_full_unstemmed Medial Unicompartmental Knee Arthroplasty in Patients with Spontaneous Osteonecrosis of the Knee
title_short Medial Unicompartmental Knee Arthroplasty in Patients with Spontaneous Osteonecrosis of the Knee
title_sort medial unicompartmental knee arthroplasty in patients with spontaneous osteonecrosis of the knee
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3232355/
https://www.ncbi.nlm.nih.gov/pubmed/22162790
http://dx.doi.org/10.4055/cios.2011.3.4.279
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