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Femoral neck remodelling after hip resurfacing surgery: a radiological study
Author(s) -
Kohan Lawrence,
Field Clarice,
Kerr Dennis,
BenNissan Besim
Publication year - 2014
Publication title -
anz journal of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 70
eISSN - 1445-2197
pISSN - 1445-1433
DOI - 10.1111/ans.12706
Subject(s) - medicine , hip resurfacing , radiological weapon , femoral neck , surgery , arthroplasty , pathology , osteoporosis
Background Narrowing of the femoral neck under the femoral component of the hip resurfacing has been noted previously and has raised concern. In this study we examined the X ‐rays of patients following B irmingham hip resurfacing surgery at 6‐years follow‐up. Methods Bony changes proximally and distally were measured. Fifty‐two patients were available for evaluation. Results There were 40 (76.9%) men and 12 (23.1%) women, with a mean age of 52 years (25–64). The unoperated contralateral femoral neck was measured as a control. We found femoral neck narrowing proximally in 82.7% of patients and distally in 26.9% and on the contralateral side in 54.5%. The average narrowing was 3.6%. Widening was observed proximally in 17.3% and distally in 73.1% and on the contralateral side in 45.5%. The average widening was 3.9%. Four of the 52 patients had proximal narrowing exceeding 10% of the femoral neck diameter, and one of the 52 patients had inferior narrowing exceeding 10%. Conclusion Gender, body mass index, component size and age did not affect remodelling. We conclude that the observed findings are likely to be a manifestation of a generalized remodelling response in the femoral neck rather than a localized and isolated narrowing at the junction of the component and the femoral neck.