Secondary patellar resurfacing in the treatment of XXXX after @entity348 .

@entity1 @entity697 @entity348 @entity158 @entity717
PURPOSE: This paper reports a prospective review of @entity1 who, between 2004 and 2007, underwent secondary patellar resurfacing (SPR) due to anterior knee @entity158 after a primary @entity348 ( @entity348 ). The aim was to evaluate the clinical outcomes obtained with the SPR and to compare them with radiological findings. METHODS: A total of twenty-seven consecutive @entity1 met the inclusion criteria. There were twenty-three (85%) @entity1 and four (15%) @entity1 with a median age of 70 years. The @entity1 were evaluated before and after the surgery with the same functional scores and radiological parameters. Bone scintigraphy was also used in the assessment, and a CT-scan was performed in order to evaluate the femoral @entity717 . The median time between @entity348 and SPR was 18 months. RESULTS: With a median follow-up of 23 months, seventeen @entity1 (63%) reported a clear subjective improvement after SPR, and patellofemoral scores (primary outcome measure), KSS and WOMAC (secondary outcome measures) showed a statistically significant improvement following the procedure. There were no significant changes after SPR in the Insall-Salvati ratio, the lateral patellar displacement or the lateral patellar tilt. The mean time between @entity348 and SPR had no statistically significant effect on outcome. The bone scintigraphy revealed increased patellar uptake in seven cases, but this was not related to subsequent improvement after SPR. Rotational computed tomography showed a median internal rotation of the femoral component of 1  . The complications observed were a patellar component loosening and an @entity697 . CONCLUSION: No clinical or radiological parameter was found to be related to the final outcome after SPR. There was a discrepancy between functional scale scores and the @entity1 's subjective satisfaction.
