Open-wedge high tibial osteotomy versus unicompartmental knee arthroplasty: no difference in progression of patellofemoral joint arthritis

  • Kwang-Jun Oh
  • Young Chan Kim
  • Jong Seong Lee
  • Yong Suk Chang
  • Gautam M. Shetty
  • Kyung Wook Nha



The purpose of this retrospective comparative study was to evaluate and compare, radiographically and clinically, progression of osteoarthritis (OA) in the patellofemoral (PF) compartment after open-wedge high tibial osteotomy (OWHTO), and unicompartmental knee arthroplasty (UKA) over a minimum follow-up of 5 years.


In this study, 42 knees in an OWHTO group were compared with 59 knees in a UKA group in terms of radiographic parameters, such as the grading system for OA progression in the PF compartment, and clinical parameters, such as the PF pain and function scores over a minimum follow-up of 5 years.


There was no significant difference of OA progression in the PF compartment between the two groups on knee radiography. Compared with the preoperative grades, the UKA group showed significant progression of OA in the medial PF compartment at the final follow-up, whereas the medial PF compartment showed significant stepwise progression by only one grade when compared to the OWHTO group. The PF pain and function scores showed no statistical differences between the two groups at the final follow-up, regardless of OA progression.


There was no significant difference between OWHTO and UKA in terms of progression of OA in the PF compartment or deterioration of PF function score over a minimum follow-up of 5 years. However, the medial PF compartment of the UKA group was minimal, and worsened or progressed by only one grade.

Level of evidence



Patellofemoral osteoarthritis High tibial osteotomy Unicompartmental knee arthroplasty 



This study was supported by Konkuk University.


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Copyright information

© European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2017

Authors and Affiliations

  1. 1.Department of Orthopaedic Surgery, IIsan Paik HospitalInje UniversityGoyangSouth Korea
  2. 2.Department of Orthopaedic SurgeryKonKuk University Medical Center, KonKuk University School of MedicneSeoulSouth Korea
  3. 3.Department of Orthopaedic SurgeryKS HospitalAnsanSouth Korea
  4. 4.Department of Orhopaedic SurgeryMullaji Knee ClinicMumbaiIndia

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