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Dual mobility cups in revision total hip arthroplasty.
International Orthopaedics 2017 March
AIM: The purpose of our study was to evaluate the dislocation and aseptic loosening rates of a dual mobility construct in revision total hip arthroplasty (THA).
METHODS: Three hundred thirty-four revision THAs performed between 2006 and 2011, using a dual mobility cup, were included in this retrospective study. The indications for revision were aseptic loosening (70%), infection (21%) and recurrent instability (9%). The minimum follow-up was five years (mean 7 ± 2 years, maximum 10 years).
RESULTS: At the latest follow-up, 11 episodes of dislocation occurred, seven of which were recurrent (1.3% for aseptic loosening, 2.8% for infection and 3.4% for recurrent dislocation). Ten cases of aseptic loosening occurred; in seven of them, a cemented cup into a reinforcement ring had been used (OR = 14, p = 0.0001).
CONCLUSION: This study provided evidence of the advantages of dual mobility cups in all revision THA indications.
METHODS: Three hundred thirty-four revision THAs performed between 2006 and 2011, using a dual mobility cup, were included in this retrospective study. The indications for revision were aseptic loosening (70%), infection (21%) and recurrent instability (9%). The minimum follow-up was five years (mean 7 ± 2 years, maximum 10 years).
RESULTS: At the latest follow-up, 11 episodes of dislocation occurred, seven of which were recurrent (1.3% for aseptic loosening, 2.8% for infection and 3.4% for recurrent dislocation). Ten cases of aseptic loosening occurred; in seven of them, a cemented cup into a reinforcement ring had been used (OR = 14, p = 0.0001).
CONCLUSION: This study provided evidence of the advantages of dual mobility cups in all revision THA indications.
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