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Knee Surgery, Sports Traumatology, Arthroscopy

, Volume 22, Issue 10, pp 2554–2559 | Cite as

Patellofemoral arthroplasty: outcomes and factors associated with early progression of tibiofemoral arthritis

  • Diane L. Dahm
  • Michael M. Kalisvaart
  • Michael J. Stuart
  • Seth W. Slettedahl
Knee

Abstract

Purpose

The purpose of this study was to review the results of patellofemoral arthroplasty (PFA) performed by a single surgeon at a single institution in order to determine factors associated with clinical outcomes and progression of tibiofemoral degenerative joint disease.

Methods

Sixty-one patients with isolated patellofemoral osteoarthritis were treated with a PFA by a single surgeon between 2003 and 2009. Fifty-nine patients were available for analysis with a mean follow-up of 4 years (range 2–6 years). Patients were evaluated by measuring range of motion and with the use of the Knee Society clinical rating system, the Tegner Activity Level Scale, and the UCLA Activity Score. In addition, preoperative radiographs were evaluated for patellofemoral and tibiofemoral compartment osteoarthritis and presence of trochlear dysplasia, and post-operative radiographs were reviewed for progression of tibiofemoral degenerative arthritis. Furthermore, multivariate statistical methods were applied to study factors that had potential to influence the final outcome.

Results

There was no statistically significant association between age, gender, history of prior knee surgery, patellar height, patellofemoral osteoarthritis severity, patellar and femoral component size, or performance of lateral release with patient pain and function (as measured by the Knee Society scores) or progression of tibiofemoral joint osteoarthritis at final follow-up. Increased preoperative body mass index (BMI) was associated with lower post-operative Knee Society function scores (p = 0.03). Patients with preoperative trochlear dysplasia had significantly less radiographic evidence of tibiofemoral joint osteoarthritis progression compared with patients without trochlear dysplasia at final follow-up (p < 0.0001).

Conclusion

In this study, patients with preoperative radiographic evidence of trochlear dysplasia experienced less progression of tibiofemoral degenerative joint disease than patients without trochlear dysplasia at a mean follow-up of 4 years.

Level of evidence

IV.

Keywords

Patellofemoral arthroplasty Patellofemoral osteoarthritis Tibiofemoral arthritis 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Diane L. Dahm
    • 1
    • 2
  • Michael M. Kalisvaart
    • 1
    • 2
  • Michael J. Stuart
    • 1
    • 2
  • Seth W. Slettedahl
    • 1
    • 2
  1. 1.Department of Orthopedic SurgeryMayo ClinicRochesterUSA
  2. 2.Department of Biomedical Statistics and InformaticsMayo ClinicRochesterUSA

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