(2011) ISBN: 9780781778602 -. The clinical evaluation can provide useful clues for the presence of such entity; however, the diagnosis can often be challenging especially in the absence of a documented history of patellar dislocation. Levy B, Tanaka M, Fulkerson J. Seven of the nine patients with patellar dislocation injuries had frank osteochondral injuries. 1. Some controversy exists regarding whether female gender is a definite risk factor for patellar instability with certain studies identifying a 33% increased likelihood of first-time dislocation as well as three times high re-dislocation rates than males, whereas others have found roughly equal rates [2, 12,13,14]. Radiology 2000; 216: 582-585. Objective: The purpose of this study is to retrospectively investigate the frequency of a focal defect at the lateral patellar retinaculum on knee MRI and to determine the variables that are significantly associated with the defect. The AIUM Practice Parameter for the Performance of the Musculoskeletal The Medial Patellofemoral Ligament (MPFL) is an hour-glass shaped ligament made of bands of retinacular tissue. Several methods have been used to assess patella alta. Arthroscopy 35:537543, Mountney J, Senavongse W, Amis AA, Thomas NP (2005) Tensile strength of the medial patellofemoral ligament before and after repair or reconstruction. Ten patients had examination under anaesthesia with . Dejour et al. The oblique decussation of the MPFL blends with fibers of the superficial MCL. Materials and methods: Two radiologists independently reviewed 99 knee MR images for the presence of a focal defect at the lateral patellar retinaculum and . Of course, if medial soft tissue restraints are disrupted at the first dislocation, the loss of such restraints makes future dislocations more likely. TT-TG distance of more than 20mm is believed to be nearly always associated with patellar instability [27]. Imaging, particularly MRI, plays a vital role in the assessment of patellar maltracking. Sonographic Appearances of Medial Retinacular Complex Injury in The MPFL is composed of a stronger transverse band and a more variable and weaker oblique decussation. Ellas et al.
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