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A SERIES OF 110 CONSECUTIVE HIPS WITH A MINIMUM FIVE-YEAR CLINICAL AND
RADIOLOGICAL FOLLOW-UP

G. N. A. Heilpern, MRCS, Orthopaedic Specialist Registrar¹;
N. N. Shah, FRCS, Senior Clinical Fellow²; and M. J. F. Fordyce, FRCS,
Consultant Orthopaedic Surgeon³

¹ King’s College Hospital, Denmark Hill, London
SE5 9RS, UK.
² Great Ormond Street Hospital, Great Ormond Street, London, WC1N
3JH, UK.
³ Kent and Sussex Hospital, Mount Ephraim, Royal Tunbridge Wells,
Kent TN4 8AT, UK.

We report the outcome at a minimum of five years of 110
consecutive metal-on-metal Birmingham Hip Resurfacing arthroplasties
in 98 patients. The procedures were performed between October 1999
and June 2002 by one surgeon. All patients were followed up
clinically and radiologically. The mean follow-up was 71 months (60
to 93). Revision of either component was defined as failure.

The mean Harris Hip score at follow-up was 96.4 (53 to 100). The
mean Oxford hip score was 41.9 (16 to 57) pre-operatively and 15.4
(12 to 49) post-operatively (p < 0.001). The mean University of
California Los Angeles activity score was 3.91 (1 to 10)
pre-operatively and 7.5 (4 to 10) post-operatively (p < 0.001).

There were four failures giving a survival at five years of 96.3%
(95% confidence interval 92.8 to 99.8). When applying a new method to
estimate narrowing of the femoral neck we identified a 10% thinning
of the femoral neck in 16 hips (14.5%), but the relevance of this
finding to the long-term outcome remains unclear.

These good medium-term results from an independent centre confirm
the original data from Birmingham.