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

This study was conducted to assess the survivorship and clinical outcomes of cup-cage reconstruction technique in the revision of THA. 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. 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. 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. •Cup-cage construct has a high implant survivorship in the treatment of Chronic PD.•Cup-cage construct have satisfactory clinical outcomes when processing Chronic PD.•High risks of complications should be considered due to the complexity of the disease