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Related Experiment Video

Updated: May 7, 2026

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
07:33

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty

Published on: May 5, 2023

Unicompartmental knee replacement after high tibial osteotomy: Invalidating a contraindication.

G A Valenzuela1, N A Jacobson, D Buzas

  • 1Wayne State University, 10000 Telegraph Road, Taylor, Michigan 48124, USA.

The Bone & Joint Journal
|October 1, 2013
PubMed
Summary

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Unicompartmental knee replacement (UKR) and total knee replacement (TKR) show similar clinical outcomes after high tibial osteotomy (HTO). However, previous HTO increases the risk of patella infra in subsequent knee replacement surgery.

Area of Science:

  • Orthopedic surgery
  • Knee arthroplasty
  • Biomechanics

Background:

  • High tibial osteotomy (HTO) is a common procedure for knee osteoarthritis, but outcomes can decline over time.
  • Revision surgery may be necessary after HTO, leading to comparisons between different reconstructive options.

Purpose of the Study:

  • To compare clinical and radiological outcomes of unicompartmental knee replacement (UKR) and total knee replacement (TKR) in patients with a history of HTO.
  • To compare these outcomes against primary UKR in knees without prior HTO.

Main Methods:

  • Retrospective study of 63 patients (63 knees) divided into three groups: UKR after HTO (Group A), TKR after HTO (Group B), and primary UKR (Group C).
  • Clinical outcomes assessed using Oxford Knee Score (OKS) and Knee Society Score (KSS) (knee and function).
Keywords:
ArthroplastyHTAHigh tibial osteotomyUKAUKRUnicompartmental knee arthroplastyUnicompartmental knee replacement

Related Experiment Videos

Last Updated: May 7, 2026

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
07:33

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty

Published on: May 5, 2023

  • Radiological assessment included hip-knee-ankle angle, mechanical axis, and patellar height, evaluated pre- and post-operatively.

    • Main Results:

    • No significant differences in OKS or KSS scores were observed between the three groups at a mean follow-up of 64 months.
    • Radiological results were comparable across groups, with the exception of patellar height.
    • A higher incidence of patella infra was noted in patients who had undergone prior HTO (Groups A and B).

    Conclusions:

    • Both UKR and TKR provide comparable clinical outcomes following HTO, similar to primary UKR.
    • Prior HTO is associated with an increased risk of patellar height issues (patella infra) in subsequent knee replacement surgery.