Survivorship and clinical outcomes of 'cup-cage' reconstruction in revision of hip arthroplasty for chronic pelvic discontinuity: A systematic review

Background: This study was conducted to assess the survivorship and clinical outcomes of cup-cage reconstruction technique in the revision of THA. Methods: PubMed, OVID, EMBASE, and Cochrane Central Register of Controlled Trials (CENTRAL) up to February 2020 were searched. Studies that reported the clinical and radiological follow-up were identified. Results: A total of 151 hips (145 patients) in six studies were included. The all-cause revision-free survivorship of cup-cage implant at the end of follow-up was 90.1% (136/151), with a mean follow-up of 64.4 months(range 12-135). The overall complication rate was 23.8% (36 of 151 hips), of which component problem, dislocation, infection and sciatic nerve palsy/injury were relatively common. All included studies reported improved clinical outcomes at the end of follow-up. Conclusion: Results suggested that revision of THA with a cup-cage has a favourable implant survivorship and clinical outcomes for the treatment of pelvic discontinuity, despite the high complications occurrence rates. (c) 2020 Royal College of Surgeons of Edinburgh (Scottish charity number SC005317) and Royal College of Surgeons in Ireland. Published by Elsevier Ltd. All rights reserved.