The relationship between head-neck ratio and pseudotumour formation in metal-on-metal resurfacing arthroplasty of the hip

G. Grammatopoulos, H. Pandit, D. W. Murray, H. S. Gill

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Pseudotumour is a rare but important complication of metal-on-metal hip resurfacing that occurs much more commonly in women than in men. We examined the relationship between head-neck ratio (HNR) and pseudotumour formation in 18 resurfaced hips (18 patients) revised for pseudotumour and 42 asymptomatic control resurfaced hips (42 patients). Patients in whom pseudotumour formation had occurred had higher pre-operative HNR than the control patients (mean 1.37 (sd 0.10) vs mean 1.30 (sd 0.08) p = 0.001). At operation the patients with pseudotumours had a greater reduction in the size of their femoral heads (p = 0.035) and subsequently had greater neck narrowing (mean 10.1% (sd 7.2) vs mean 3.8% (sd 3.2) p <0.001). No female patient with a pre-operative HNR
Original languageEnglish
Pages (from-to)1527-1534
Number of pages8
JournalJournal of Bone and Joint Surgery - British Volume
Volume92
Issue number11
DOIs
Publication statusPublished - 2010

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