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Revista Brasileira de Ortopedia

versão impressa ISSN 0102-3616

Resumo

SANTOS NETTO, Alfredo dos et al. Study on the patellofemoral joint using magnetic resonance imaging: morphological variation of the medial patellofemoral ligament. Rev. bras. ortop. [online]. 2012, vol.47, n.2, pp.204-209. ISSN 0102-3616.  http://dx.doi.org/10.1590/S0102-36162012000200010.

OBJECTIVES: To study the measurements and anatomical relationships of the patellofemoral joint using magnetic resonance imaging, and to evaluate the variation in the morphology of the medial patellofemoral ligament (MPFL) according to patients' heights and ages and the variation in measurements on other structures that are known to be involved in predisposition to patellar instability. METHOD: Twenty-three knees (18 patients) underwent magnetic resonance imaging and their interepicondylar distance, patellar height, trochlear depth, ventral trochlear prominence, trochlear groove angle, lateral facet tilt, lateral patellar tilt and size of the lateral and medial facets and their ratio were measured. These measurements were compared with the length and thickness of the MPFL. RESULTS: The average length of the MPFL was 46.4 mm, while the average thicknesses of its patellar insertion, middle third and femoral insertion were, respectively, 1.7 mm, 1.4 mm and 1.2 mm. The thickness of the MPFL correlated positively with the lateral condyle and interepicondylar distance measurements, and negatively with the patients' ages. Conclusion: The morphology of the MPFL varies with the interepicondylar distance and the lateral condyle distance, and with patients' ages.

Palavras-chave : Patella; Patellar Ligament; Joint Instability; Knee.

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