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We report the results of a modified Fulkerson technique of antero-medialisation of the tibial tubercle, combined with microfracture or abrasion arthroplasty in patients under 60 with patello-femoral osteoarthritis.

All patients operated on between September 1992 and October 2007 were reviewed by an independent observer in clinic or by postal questionnaire, using the Oxford Knee Score, Melbourne Patella Score and a Satisfaction Score. Only patients with Outerbridge Grade 3 – 4 osteoarthritis of the patello-femoral joint were included. They were assessed pre-operatively with plain x-rays, MRI scans (as well as tracking scans in the last 10 years) and arthroscopically. All patients with tracking scans showed lateral subluxation of the patella.

The surgical procedure was a modification of Fulkerson's tibial tubercle osteotomy, with an advancement of 1-1.5 cms and a medialisation of 1.5 cms. The exposed bone of the patella and trochlea was drilled in the early cases and in the later cases an arthroscopic microfracture or abrasion using a power burr was carried out.

Between September 1992 and October 2007, 103 procedures were carried out in 84 patients, 19 patients having staged bilateral procedures. The mean follow up was 84 months (range 24 – 204 months). The mean age was 45 (range 26 – 59) and the female to male ratio was 7.6:1. 70 patients were reviewed giving a follow up rate of 82%. The mean Oxford Knee Score was 18.5 pre-operatively (range 3- 32) and 34.3 post-operatively (range 11- 47). The Melbourne Patella Score was 9.6 pre-operatively (range 3- 30) and 20 post-operatively (range 11- 30). Patient Satisfaction Scores were excellent (54%), good (29%), fair (8.5%) and poor (8.5%). 4 knees in 3 patients were converted to a patello-femoral arthroplasty, giving a 10 year survival rate of 96.1%.

This procedure offers an alternative to patello-femoral arthroplasty for younger patients with isolated patello-femoral arthritis.