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J Knee Surg 2022; 35(07): 810-815
DOI: 10.1055/s-0040-1718606
Original Article

Preoperative Condition of the Patellofemoral Joint Does Not Negatively Impact Surgical Outcomes of Lateral Unicompartmental Knee Arthroplasty in the Short Term

Masahiro Fujita
1   Department of Orthopaedic Surgery and Joint Surgery Centre, Takatsuki General Hospital, Takatsuki, Osaka, Japan
2   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Chuo-Ku, Kobe, Hyogo, Japan
,
Takafumi Hiranaka
1   Department of Orthopaedic Surgery and Joint Surgery Centre, Takatsuki General Hospital, Takatsuki, Osaka, Japan
,
Tomoyuki Kamenaga
2   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Chuo-Ku, Kobe, Hyogo, Japan
,
Masanori Tsubosaka
2   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Chuo-Ku, Kobe, Hyogo, Japan
,
Naoki Nakano
2   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Chuo-Ku, Kobe, Hyogo, Japan
,
Shinya Hayashi
2   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Chuo-Ku, Kobe, Hyogo, Japan
,
Ryosuke Kuroda
2   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Chuo-Ku, Kobe, Hyogo, Japan
,
Tomoyuki Matsumoto
2   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Chuo-Ku, Kobe, Hyogo, Japan
› Institutsangaben Funding None.
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Abstract

The relationship between patellofemoral joint (PFJ) degeneration and clinical outcomes following lateral unicompartmental knee arthroplasty (UKA) has not been well described thus far. This study aimed to investigate the relationship between the preoperative PFJ condition and postoperative outcomes and the changes in lower-limb and PFJ alignment after lateral UKA. This was a retrospective study including 54 patients (mean age 72.9 years) who underwent lateral UKA for isolated lateral knee osteoarthritis at our institution between March 2013 and January 2019. The Oxford Knee Score (OKS), the Knee Society Score-Knee (KSSK), and Knee Society Score-Function (KSSF), the degree of degeneration, tilting angle and lateral shift of the PFJ, and the hip-knee-ankle angle (HKA) were evaluated pre- and postoperatively. The average follow-up period was 2.8 (range 1–6.1) years. There was a significant improvement in the OKS, KSSK, and KSSF after lateral UKA. Preoperative degeneration of the PFJ did not correlate with the recovery of clinical scores. The degeneration, tilting angle, and lateral shift of the PFJ did not significantly progress following lateral UKA. The HKA was improved after lateral UKA, and there was no correlation between the HKA change and PFJ condition. Postoperative severe valgus knee alignment was associated with a greater tilting angle. Preoperative degeneration of the PFJ did not have a negative impact on postoperative outcomes, and no short-term changes in the degeneration, tilting angle, and lateral shift of the PFJ were observed. Correction of knee-joint alignment did not have a negative impact on the condition of the PFJ.

Keywords

lateral osteoarthritis - unicompartmental knee arthroplasty - patellofemoral joint


Publikationsverlauf

Eingereicht: 06. Juni 2020

Angenommen: 25. August 2020

Artikel online veröffentlicht:
27. Oktober 2020

© 2020. Thieme. All rights reserved.

Thieme Medical Publishers, Inc.
333 Seventh Avenue, 18th Floor, New York, NY 10001, USA

 

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