166 Dual Mobility for Total Hip Arthroplasty Revision Surgery: A Systematic Review and Metanalysis

Abstract Dual Mobility (DM) implants provide greater stability especially in Revision Total Hip Arthroplasty (R-THA) when compared to primary THA. Aim: identify the current evidence regarding outcomes of DM R-THA fixed-bearing (FB) implants. Review accordance with PRISMA guidelines. Structured electronic searches. Primary outcome measure: dislocation rate following R-THA. Secondary measures: implant survival, aseptic loosening, infection rate. Studies' methodology quality assessed using MINORS criteria. All articles published from 2016 December 2019 included. 1777 R-THAs were reported (49.9% acetabular component, 50.1% FB component). Sample size: 67-426 patients. Mean age: 57-73. follow-up period: 12-60 months. Significant risk ratio 1.08 [1.05, 1.12] (95% CI, I2 = 37%, P < 0.00001) statistically significant difference between two groups favour implant. Statistically group respect (risk 0.22, 95% CI; and loosening 0.51, 0.05). No statistical on for 0.94 0.85). are beneficial However, one needs balance benefits considering patient’s clinical conditions costs involved.