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HYDROXYAPATITE CERAMIC COATED FEMORAL STEMS IN YOUNG PATIENTS. STEMS IN YOUNG PATIENTS. A PROSPECTIVE TEN YEAR STUDY

Worthing and Southlands NHS Trusts, Lyndhurst Road, Worthing BN11 2DH

We describe the clinical and radiological results of thirty eight consecutive total hip replacements, using the JRI Furlong Hydroxyapatite ceramic coated femoral component (JRI Instrumentation Ltd, London, UK) in patients under the age of 50 at the time of surgery. The mean age at the time of operation was 42 years (range 22 to 49 years). The average length of follow up was 10 years (range 63 to 170 months). All patients receiving a Furlong HAC THR were included regardless of their primary aetiology. These included patients on whom previous hip joint surgery had taken place.

The mean Harris hip score improved from 44 pre-operatively to 92 at the latest post-operative review. The mean WOMAC and Oxford scores at the latest review for this study were 29 and 16 respectively. Using the Charnley modification of the Merle d’Aubign_ and Postel hip score, at the latest follow up the mean scores were as follows: Pain 5.37, Function 5.47, and Range of Motion 5.71.

The mean pain visual analogue score was 1.1 and 94% of patients returned to outdoor activities or sports. There were no reports of thigh pain at any review. There was no loss to follow-up. There were no revisions of any femoral component. Radiological review of the femoral components revealed no continuous or progressive radiolucent lines around the stem. No osteolysis was noted. Using revision or impending revision as the end point at 12 years the cumulative survival for the stem was 100% (95% CI 89 to 100).

We present excellent clinical, radiological and survivrship results with the use of HAC components in young, active patients with varying primary pathology, after ten years use.

The abstracts were prepared by Mr Tim Briggs. (Editoral Secretary 2003/4) Correspondence should be addressed to him at Lane Farm, Chapel Lane, Totternhoe, Dunstable, Bedfordshire LU6 2BZ, United Kingdom