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Radiographic parameters associated with lateral patella degeneration in young patients

  • Knee
  • Published:
Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Localized articular cartilage degeneration in the patellofemoral joint is a common but yet understudied condition in younger patients. The purpose of this paper was to determine whether there are significant differences in radiographic alignment between those with and without isolated lateral patellofemoral degeneration.

Methods

Subjects with isolated symptomatic lateral patellofemoral degeneration and control subjects with no radiographic degeneration participated in the study. Variables of interest included the Caton-Deschamps index, sulcus angle, lateral patellofemoral angle, Dejour classification of trochlear dysplasia, patella linear displacement and the tibial tubercle-trochlear groove distance.

Results

We found significant differences between the patellofemoral degeneration group versus control group, respectively, for the Caton-Deschamps index (1.12 ± 0.1 vs. 1.00 ± 0.1), lateral patellofemoral angle (10.6 ± 4.3 vs. 16.6 ± 5.5) and tibial tubercle-trochlear groove distance (16.6 ± 4.0 vs. 9.0 ± 4.3). However, we found no difference in the sulcus angle (141.2 ± 8.2 vs. 137.0 ± 6.0), patella linear displacement (3.7 ± 1.9 vs. 4.0 ± 1.7) or in the Dejour Classification.

Conclusion

It appears that isolated lateral patellofemoral degeneration is associated with specific radiographic indices. Even though the radiographic measures in patients with degeneration may not be considered pathologic, they are “high normal” and may represent a risk factor for the development of focal chondral degeneration in the lateral trochlea and patella.

Level of evidence

III.

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Authors and Affiliations

  1. Division of Physical Therapy, University of Kentucky, Wethington Bldg Rm 204D, 900 S. Limestone, Lexington, KY, 40536-0200, USA

    Brian Noehren

  2. Department of Orthopaedics, University of Kentucky, Lexington, KY, USA

    Stephan Duncan & Christian Lattermann

Authors
  1. Brian Noehren
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  2. Stephan Duncan
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  3. Christian Lattermann
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Correspondence to Brian Noehren.

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Noehren, B., Duncan, S. & Lattermann, C. Radiographic parameters associated with lateral patella degeneration in young patients. Knee Surg Sports Traumatol Arthrosc 20, 2385–2390 (2012). https://doi.org/10.1007/s00167-012-1884-y

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  • DOI: https://doi.org/10.1007/s00167-012-1884-y

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