Conversion Unicondylar Knee Arthroplasty in the Indian Patient: What Can You Expect?

IF 1.3 4区医学 Q3 ORTHOPEDICS

Indian Journal of Orthopaedics Pub Date : 2026-06-01 eCollection Date: 2026-09-01 DOI:10.1007/s43465-026-01831-0

Adit R Maniar, Rajesh N Maniar, Muhammad Naqvi, Nishant Sanghavi

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引用次数: 0

Abstract

Introduction: Our aim was to compare the clinical outcomes of conversion unicompartmental knee arthroplasty (UKA) with (a) primary total knee arthroplasty (TKA) and (b) revision TKA.

Methods: We retrospectively identified 17 patients undergoing conversion of UKA to TKA by a single surgeon with a minimum 1 year follow-up. These patients were matched 1:1 to patients undergoing primary TKA and revision TKA based on age, sex, BMI and time to final follow-up forming three groups: conversion UKA group (C-UKA), primary TKA group (P-TKA) and revision TKA group (R-TKA). Clinical outcomes were compared using New Knee Society Score (NKSS) and Forgotten Joint Score (FJS). The level of significance was set at 0.05.

Results: The average time to surgery in the C-UKA group was 7.2 years (range 2.5-17.2), with 82.5% being less than 10 years from index UKA. The mean follow-up was 3.7 years in the C-UKA group. All patients required more than a primary component on the tibial side. Flexion (p = 0.03), symptom (p < 0.001) and function (p < 0.001) subcomponent as well as total NKSS (p = 0.001) were significantly lower in the C-UKA group as compared to the P-TKA group. The flexion (p = 0.67), FJS (p = 0.71) as well as the NKSS and its subcomponents were comparable (p > 0.05) between the C-UKA and R-TKA groups.

Conclusion: When performing conversion of a medial UKA in the Indian population, a revision component is required in all patients on the tibial side. The clinical outcomes of conversion UKA were poorer than a primary TKA and more comparable to a revision TKA. Surgeons should keep this in consideration when performing a medial UKA, especially in cases with extended indications.

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转换单髁膝关节置换在印度患者：你能期待什么？

我们的目的是比较(a)原发性全膝关节置换术（TKA）和(b)改良型全膝关节置换术（TKA）的临床结果。方法：我们回顾性地确定了17例由单一外科医生进行UKA到TKA转换的患者，随访至少1年。这些患者根据年龄、性别、BMI和最终随访时间与进行原发性TKA和改进性TKA的患者进行1:1匹配，形成3组：转换组（C-UKA）、原发性TKA组（P-TKA）和改进性TKA组（R-TKA）。临床结果采用新膝关节社会评分（NKSS）和遗忘关节评分（FJS）进行比较。显著性水平设为0.05。结果：C-UKA组平均手术时间为7.2年（2.5 ~ 17.2年），82.5%的患者距指数UKA不到10年。C-UKA组的平均随访时间为3.7年。所有患者都需要胫骨侧不止一个主要假体。与p - tka组相比，C-UKA组屈曲（p = 0.03）、症状（p p = 0.001）显著降低。屈曲（p = 0.67）、FJS （p = 0.71）、NKSS及其子成分在C-UKA组和R-TKA组之间具有可比性（p > 0.05）。结论：当在印度人群中进行内侧UKA的转换时，所有患者都需要在胫骨侧进行翻修。转换性TKA的临床结果比原发性TKA差，与改进性TKA更具可比性。外科医生在进行内侧UKA时应考虑到这一点，特别是在有扩展指征的情况下。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Indian Journal of Orthopaedics ORTHOPEDICS-

CiteScore

1.80

自引率

0.00%

发文量

185

审稿时长

9 months

期刊介绍： IJO welcomes articles that contribute to Orthopaedic knowledge from India and overseas. We publish articles dealing with clinical orthopaedics and basic research in orthopaedic surgery. Articles are accepted only for exclusive publication in the Indian Journal of Orthopaedics. Previously published articles, articles which are in peer-reviewed electronic publications in other journals, are not accepted by the Journal. Published articles and illustrations become the property of the Journal. The copyright remains with the journal. Studies must be carried out in accordance with World Medical Association Declaration of Helsinki.