Midterm Outcomes After Reconstruction of Superolateral Acetabular Defects Using Flying Buttress Porous Tantalum Augments During Revision Total Hip Arthroplasty

BackgroundPorous tantalum augments are versatile tools in reconstructing complex acetabular defects during revision total hip arthroplasty (THA). This study examines the clinical and radiographic outcomes of porous placed type I (flying buttress) configuration at two to 17-year follow-up largest cohort to-date literature.MethodsWe retrospectively analyzed 59 consecutive THAs involving use flying buttress between 2003 2018. The mean patient age duration were 63.9 ± 11.6 years (range, 35-87) 8 2-17), respectively. Oxford score was used assess outcome. modified Moore classification augment shell osseointegration. Kaplan-Meier survival analysis with 95% confidence interval (CI) implant survivorship.ResultsThe improved from 15.9 6.2 preoperatively 35.0 6.5 a eight (P < .0001). Radiographic assessment using demonstrated five signs osseointegration 49 hips (83.1%), four six (10.2%), three one (1.7%), sign (1.7%). ten-year survivorship 88.9% (95% CI 74.4-95.4) all-cause as end point 94.3% 83.1-98.2) for aseptic loosening point.ConclusionTreatment superolateral THA provides excellent favorable mid-term follow-up.Level EvidenceTherapeutic Level IV.