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Volume 4, Issue 2, Pages 169-174 (June 2018) Early aseptic loosening of the Tritanium primary acetabular component with screw fixation William J. Long, MD, FRCSC, Samir Nayyar, MD, Kevin K. Chen, MA, David Novikov, BS, Roy I. Davidovitch, MD, Jonathan M. Vigdorchik, MD Arthroplasty Today Volume 4, Issue 2, Pages 169-174 (June 2018) DOI: 10.1016/j.artd.2017.11.009 Copyright © 2017 The Authors Terms and Conditions

Figure 1 (a) Anteroposterior (AP) radiograph of case 1 demonstrating complete radiolucency in zones 1-3 at 1 year after primary THA. (b) Axial view of a computed tomography scan of case 1 demonstrating a complete radiolucent line in all zones (white arrowheads) 14 months after primary THA. (c) Coronal view of a computed tomography scan of case 1 demonstrating a complete radiolucent line in all zones (white arrowheads) 14 months after primary THA. (d) AP radiograph of case 1 demonstrating no evidence of radiolucency 13 months after revision THA. (e) Coronal view of a computed tomography scan of case 1 demonstrating no evidence of radiolucency 13 months after revision THA. Arthroplasty Today 2018 4, 169-174DOI: (10.1016/j.artd.2017.11.009) Copyright © 2017 The Authors Terms and Conditions

Figure 2 (a) AP radiograph of case 4 demonstrating no radiolucency 3 months after primary THA. (b) AP radiograph of case 4 demonstrating circumferential radiolucency in all 3 Charnley zones 3.5 years after primary THA. (c) AP radiograph of case 4 demonstrating no sign of loosening 2 months after revision THA. Arthroplasty Today 2018 4, 169-174DOI: (10.1016/j.artd.2017.11.009) Copyright © 2017 The Authors Terms and Conditions

Figure 3 (a). AP radiograph of case 5 demonstrating circumferential radiolucency (white arrowheads) 6 months after primary THA. (b). AP radiograph of case 5 demonstrating no evidence of loosening or radiolucency after revision THA. Arthroplasty Today 2018 4, 169-174DOI: (10.1016/j.artd.2017.11.009) Copyright © 2017 The Authors Terms and Conditions

Figure 4 Removed Tritanium acetabular shell from case 5 that was grossly loose intraoperatively. Arthroplasty Today 2018 4, 169-174DOI: (10.1016/j.artd.2017.11.009) Copyright © 2017 The Authors Terms and Conditions