[Analysis of Medial Unicompartmental Knee Arthroplasty for Patients with Spontaneous Osteonecrosis of the Knee]

Overview

Journal Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi

Specialty General Surgery

Date 2019 Jan 16

PMID 30644254

Citations 2

Authors

Deqing Hu

Zida Huang

Wenming Zhang

Jianhua Lin

Wenbo Li

Affiliations

Soon will be listed here.

Abstract

Objective: To analyse the effectiveness of unicompartmental knee arthroplasty (UKA) for the patients with spontaneous osteonecrosis of the knee (SONK).

Methods: Between January 2012 and December 2016, 31 patients with SONK was admitted and treated with medial UKA. All patients were examined by both plain radiography and magnetic resonance images. The patients were composed of 5 men and 26 women with an average age of 64.3 years (range, 48-79 years), and with 16 left joints and 15 right joints. The average disease duration was 14.7 months (range, 6-26 months). Preoperative visual analogue scale (VAS) was 6.00±1.15, Hospital for Special Surgery (HSS) score was 55.77±11.03, and knee range of motion (ROM) was (114.68±10.40)°. The imaging examinations showed that all the lesions were located in the medial compartment of the knee joint and there were 19 patients with Aglietti stage Ⅳ and 12 patients with Aglietti stage Ⅴ. Preoperative femorotibial angle (FTA) was (177.39±1.63)° and posterior tibial slope (PTS) was (84.05±1.39)°.

Results: All the incisions healed by first intention. All patients were followed up 14-46 months (mean, 25 months). At last follow-up, VAS score was 2.06±0.72 and HSS score was 86.45±3.67, which both improved significantly when compared with preoperative scores ( =22.73, =0.00; =-14.72, =0.00). ROM was (118.06±3.80)° with no significant difference when compared with preoperative ROM ( =-1.78, =0.08). The X-ray films showed there was no severe adverse events, such as periprosthetic infection, aseptic loosening, bearing dislocation, and so on. At last follow- up, PTS was (85.30±1.19)° with significant difference compared with preoperative one ( =-4.07, =0.00); while FTA was (177.51±1.98)° with no significant difference when compared with preoperative FTA ( =-0.38, =0.71).

Conclusion: UKA may be an optional management for SONK with minimally invasive, bone-preserving, and rapid recovery.

Citing Articles

Osteoporosis, Osteoarthritis, and Subchondral Insufficiency Fracture: Recent Insights.

Yokota S, Ishizu H, Miyazaki T, Takahashi D, Iwasaki N, Shimizu T Biomedicines. 2024; 12(4).

PMID: 38672197 PMC: 11048726. DOI: 10.3390/biomedicines12040843.

Comparison of the efficacy of Oxford unicondylar replacement for the treatment of spontaneous osteonecrosis of the knee versus medial knee osteoarthritis: a meta-analysis.

Liu P, Li L, Yang J, Li H, Feng Y, Qin Z J Orthop Surg Res. 2024; 19(1):86.

PMID: 38254108 PMC: 10801981. DOI: 10.1186/s13018-023-04519-5.

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