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To the Editor: I read with interest the paper by Sillanpàà et al. [1] entitled ‘‘Ligament Reconstruction Versus Distal Realignment for Patellar Dislocation’’ published in the June 2008 issue. I congratulate the authors on their study, for the longterm followup and for the comparative study with distal realignment. However, I ask for clarification of two issues. First, what are the indications f...

Instability of the patella is a relatively frequent occurrence in adolescents. Its pathogenesis, which is multi-factorial, is still much debated. Stability of the patella is guaranteed by a delicate balance of a series of factors (osteo-cartilaginous, ligamentous and muscular), and it is not surprising that alteration of one or more of these can lead to pathological conditions that can range fr...

Patellofemoral joint instability is a complex clinical problem. It may be a consequence of pre-existing anatomical abnormality or trauma. The objectives of this study were to use experimental mechanics to measure patellar stability and to quantify the effects of pathological abnormalities on patellar stability in vitro. Eight fresh-frozen cadaver knees were studied. The patellar stability was m...

Patellar instability is a common finding in patients with below-knee amputation and yet management options are not commonly described in the literature. We describe the first reported case of a medial patellofemoral ligament reconstruction using allograft in a patient with a below-knee amputation. Clinical outcome at two-year follow-up remains very good.

INTRODUCTION Patellofemoral instability is a common knee disease. Its etiology is complex and variable, with many components making different contributions in each individual, resulting in several distinct clinical presentations. Our goal was to analyze the results of surgical treatment in our hospital over a period of 10 years. PATIENTS AND METHODS We analyzed 55 knees of 47 patients who und...