Effect of medial patellofemoral ligament reconstruction surgery, on performance of functional tests and knee outcome scores, in patients with patella instability.
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Reconstruction of the medial patellofemoral ligament (MPFL) has become an increasingly popular technique in the treatment of patients with patella instability. Knee specific outcome scores are frequently used to assess patient outcome, there are currently no published papers assessing the performance of functional tests preand post-operatively. This quantitative longitudinal study evaluates the effect of MPFL reconstruction using a standardised autologous hamstring technique, on performance of functional tests in patients with patella instability. Performance of the Y-balance test and horizontal hop test, were evaluated alongside the Kujala knee outcome score. Between September 2011 and February 2012 all patients over the age of 18 were approached at a pre-operative assessment clinic with a view to recruitment to the study. Follow-up data is reported for 14 patients with a gender split of nine male and five female, with a mean age of 27 years (range 19-48 +/- 8.1SD). Time since first patella dislocation varied between one month and 13 years (mean 80 months +/- 113SD, median 36 months). There was a statistically significant (p<0.05) difference in pre-operative and post-operative Kujala knee outcome scores, and in performance of the Y-balance, and hop test for patients from pre-operative assessment, to the six-month test point. There have been no reported dislocations, or symptoms of recurrent instability in this series. The inclusion of functional tests, alongside knee specific outcomes scores, in evaluating recovery and change in physical function following MPFL reconstruction in patients with patella instability,appears to have been advantageous, as these tests replicate activities that patients repeatedly report as provocative.
- Masters Degrees (Sport) 
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