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[Study of the patellar apex in objective patellar dislocation].

E Servien1, T Ait Si Selmi, P Neyret

  • 1Centre Livet, Service de Chirurgie Orthopédique, Hôpital de la Croix-Rousse, 8, rue des Margnolles, 69330 Caluire et Cuire.

Revue De Chirurgie Orthopedique Et Reparatrice De L'Appareil Moteur
|December 31, 2003
PubMed
Summary

This study investigated patellar morphology in patients with patellar dislocation. Findings suggest specific patellar shapes, like a hypoplastic medial border or short apex, may predispose individuals to patellar dislocation.

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Area of Science:

  • Orthopedic surgery
  • Radiology
  • Human anatomy

Context:

  • Patellar dislocation is a common orthopedic issue.
  • The role of patellar morphology in patellar dislocation requires further investigation.
  • Existing literature on patellar morphology is limited, particularly since Wiberg's 1941 work.

Purpose:

  • To analyze patellar morphology in patients with objective patellar dislocation.
  • To identify specific patellar dysplastic features associated with dislocation.
  • To explore the relationship between patellar morphology and patellar dislocation.

Summary:

  • A study of 140 patients (190 knees) analyzed patellar morphology using X-rays, CT scans, and MRI.
  • Significant correlations were found between patellar shape classifications (Wiberg, Maldague) and specific measurements like patellar apex length and medial border length.

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  • Men showed a higher prevalence of dysplastic patellae (Wiberg grade C).

    • Impact:

    • Suggests that specific patellar morphotypes, including a hypoplastic medial border or short patellar apex, may be key factors in objective patellar dislocation.
    • Highlights the potential role of patellar dysplasia over trochlear dysplasia in dislocation.
    • Provides valuable data for understanding the biomechanics of patellar instability.