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Journal of Bone and Joint Surgery - British Volume, Vol 89-B, Issue 3, 310-315.
doi: 10.1302/0301-620X.89B3.18062  
Copyright © 2007 by British Editorial Society of Bone and Joint Surgery
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The Avon patellofemoral arthroplasty

FIVE-YEAR SURVIVORSHIP AND FUNCTIONAL RESULTS

C. E. Ackroyd, MA, FRCS, Consultant Orthopaedic Surgeon1; J. H. Newman, MA, FRCS, Consultant Orthopaedic Surgeon1; R. Evans, RGN, Research Nurse1; J. D. J. Eldridge, BSc, FRCS(Orth), Consultant Orthopaedic Surgeon1; and C. C. Joslin, MBChB, FRCS(Orth), Specialist Registrar1

1 Bristol Knee Group, Winford Unit, Avon Orthopaedic Centre, Southmead Hospital, Westbury-on-Trym, Bristol BS10 5NB, UK.

Correspondence should be sent to Mr C. E. Ackroyd at 2 Clifton Park, Clifton, Bristol BS8 3BS, UK; e-mail: Kathiereynolds{at}2CP.co.uk

We report the mid-term results of a new patellofemoral arthroplasty for established isolated patellofemoral arthritis. We have reviewed the experience of 109 consecutive patellofemoral resurfacing arthroplasties in 85 patients who were followed up for at least five years.

The five-year survival rate, with revision as the endpoint, was 95.8% (95% confidence interval 91.8% to 99.8%). There were no cases of loosening of the prosthesis. At five years the median Bristol pain score improved from 15 of 40 points (interquartile range 5 to 20) pre-operatively, to 35 (interquartile range 20 to 40), the median Melbourne score from 10 of 30 points (interquartile range 6 to 15) to 25 (interquartile range 20 to 29), and the median Oxford score from 18 of 48 points (interquartile range 13 to 24) to 39 (interquartile range 24 to 45). Successful results, judged on a Bristol pain score of at least 20 at five years, occurred in 80% (66) of knees. The main complication was radiological progression of arthritis, which occurred in 25 patients (28%) and emphasises the importance of the careful selection of patients. These results give increased confidence in the use of patellofemoral arthroplasty.






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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General