COMPARATIVE STUDY
JOURNAL ARTICLE

Are leg length and hip offset comparable after hip resurfacing and cementless total hip arthroplasty?

S Patel, R R Thakrar, J Bhamra, F Hossain, M Tengrootenhuysen, F S Haddad
Annals of the Royal College of Surgeons of England 2011, 93 (6): 465-9
21929917

INTRODUCTION: The purpose of this study was to determine if hip resurfacing arthroplasty (HRA) and cementless total hip arthroplasty (THA) were comparable in correcting leg length and hip offset in patients with primary osteoarthritis.

METHODS: A retrospective analysis was performed of 80 patients who underwent either HRA or cementless THA for primary osteoarthritis (40 in each group) between 2006 and 2008. Standardised anteroposterior radiographs taken pre-operatively and at one year following surgery were used to calculate the total offset and leg length in both hips.

RESULTS: At one year following surgery, no leg length discrepancy was identified in either group. A difference of 0.39 cm (p=0.046) remained between the mean total offset of the operated hip and the contralateral non-operated hip in the HRA group. No difference in offset was observed between the two hips after surgery in the THA group (p=0.875).

CONCLUSIONS: Leg length is restored by HRA and THA. A difference remains in offset after HRA although we attribute this to intentional medialisation of the acetabular cup.

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