Background: Knee osteoarthritis is diagnoses and monitored with radiography. Arthroscopy is considered the most valid method for evaluation of cartilage lesions. The best way for grading, measure and dimension is direct visualisation. Methods: Patelar cartilage lesion was analysed macroscopically during 176 total knee replacement. The grading of cartilage lesion, by direct visualisation, indentified six diferents groups. Results: Patellar articular cartilage was damaged in all 176 cases. There was no evidence of association between grade of arthrosis, gender, side or age. There is an association between tricompartmental arthrosis, varus deformity, obesity and grade of patelar arthrosis. Conclusion: All classifications systems regarding the femoropatellar cartilage lesions are unrealistic. Important subchondral bone exposure occurred in 77,2% patelar articular surface.

Objective: To study the influence of patellar resurfacing on quality of life under a standardised score. The chosen score was the Knee Society Score (KSS), which considers range of motion, pain, contractors, alignment and stability. Methods: Retrospective review of 60 patients submitted to total knee arthroplasty (TKA) was divided into two groups: with patellar resurfacing (PR) and without patellar resurfacing (NPR). We reviewed data from these patients containing the KSS, which are routinely used in our service. Data were analysed from 2013 to 2014, with a minimal patient follow-up of 18 months. Results: There were no unsatisfactory scores in our study. Total scores (KSS) were similar between the groups (mean KSS: PR = 88.36 ± 9.64; NPR = 84.26 ± 9.44 [p = 0.1]). While stratifying into groups (poor, fair, good, excellent), we found excellent results in 84.8% of PR versus 59.3% NPR (p = 0.056). These data did not reach statistical significance and can therefore be considered a coincidental result. Conclusion: Although these results did not show statistical significance (p = 0.056), patellar resurfacing patients tend to get more "excellent" results after 18 months of follow-up in quality of life when evaluated by KSS. Perhaps a larger amount of patients would suffice to acquire statistical significance in a future study.

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Slipped capital femoral epiphysis is a very frequently seen condition in orthopedics centers worldwide. Even in successfully treated cases, complications related either with the pathology per se or with the chosen synthesis method are not rare.This report presents a case of bilateral slipped capital femoral epiphysis treated with pinning, in which one of the limbs developed a very rare condition: the formation of a femoral pseudoaneurysm that ruptured.