BACKGROUND: In a previous study concerning 1,660 ScanHip THAs that were followed for up to 12 years, the cumulative revision rate was not found to be dependent on whether a 22-mm or a 32-mm head size had been used. We have re-examined these patients to see whether a longer follow-up time (9-21 years) would disclose an effect of head size on the revision rate. PATIENTS AND METHODS: We analyzed the cumulative revision rate for 1,720 Scan Hip arthroplasties with either 22-mm or 32-mm femoral heads. The patients were followed for 9-21 years. RESULTS: Arthroplasties with 32-mm head had 2.8-times higher cumulative revision rate than those with a 22-mm head. Older age reduced the risk of revision while male sex increased the risk. INTERPRETATION: We found that head size affects revision risk, but that even in a reasonably large material a long follow-up time is required to disclose the effects of head size--and thus wear--on survival.
BACKGROUND: In a previous study concerning 1,660 ScanHip THAs that were followed for up to 12 years, the cumulative revision rate was not found to be dependent on whether a 22-mm or a 32-mm head size had been used. We have re-examined these patients to see whether a longer follow-up time (9-21 years) would disclose an effect of head size on the revision rate. PATIENTS AND METHODS: We analyzed the cumulative revision rate for 1,720 Scan Hip arthroplasties with either 22-mm or 32-mm femoral heads. The patients were followed for 9-21 years. RESULTS: Arthroplasties with 32-mm head had 2.8-times higher cumulative revision rate than those with a 22-mm head. Older age reduced the risk of revision while male sex increased the risk. INTERPRETATION: We found that head size affects revision risk, but that even in a reasonably large material a long follow-up time is required to disclose the effects of head size--and thus wear--on survival.
Authors: Marc C Attinger; Pascal C Haefeli; Henrik C Bäcker; Remy Flueckiger; Peter M Ballmer; Klaus A Siebenrock; Frank M Klenke Journal: Int Orthop Date: 2019-01-20 Impact factor: 3.075
Authors: Bart A Swierstra; Anton M J S Vervest; Geert H I M Walenkamp; B Wim Schreurs; Pieter T J Spierings; Ide C Heyligers; Job L C van Susante; Harmen B Ettema; Mariette J Jansen; Pim J Hennis; Janneke de Vries; Sabrina B Muller-Ploeger; Margreet A Pols Journal: Acta Orthop Date: 2011-10 Impact factor: 3.717
Authors: Julian Jz Prokopetz; Elena Losina; Robin L Bliss; John Wright; John A Baron; Jeffrey N Katz Journal: BMC Musculoskelet Disord Date: 2012-12-15 Impact factor: 2.362