Pinnacle polyethylene liner dissociation: a report of 3 cases

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Pinnacle polyethylene liner dissociation: a report of 3 cases Ryland Kagan, MD, Mike B. Anderson, MSc, Christopher Peters, MD, Christopher Pelt, MD, Jeremy Gililland, MD Arthroplasty Today Volume 4, Issue 4, Pages 441-446 (December 2018) DOI: 10.1016/j.artd.2018.08.001 Copyright © 2018 Terms and Conditions

Figure 1 (a) Preoperative and (b) postoperative anteroposterior (AP) pelvis radiographs and (c) AP pelvis radiograph showing liner disassociation with asymmetrical position of the femoral head within the acetabular component for case 1. Arthroplasty Today 2018 4, 441-446DOI: (10.1016/j.artd.2018.08.001) Copyright © 2018 Terms and Conditions

Figure 2 (a) Intraoperative photograph after capsulotomy showing disassociation of the polyethylene liner with rotational displacement, and (b) intraoperative photograph of the retrieved polyethylene liner with loss of 4 of the locking tabs at the rim in case 1. Arthroplasty Today 2018 4, 441-446DOI: (10.1016/j.artd.2018.08.001) Copyright © 2018 Terms and Conditions

Figure 3 (a) Preoperative and (b) postoperative AP pelvis radiographs and (c) AP pelvis radiograph showing liner disassociation with asymmetrical position of the femoral head within the acetabular component for case 2. Arthroplasty Today 2018 4, 441-446DOI: (10.1016/j.artd.2018.08.001) Copyright © 2018 Terms and Conditions

Figure 4 (a) Preoperative and (b) postoperative AP pelvis radiographs and (c) AP pelvis radiograph showing liner disassociation with asymmetrical position of the femoral head within the acetabular component for case 3. Arthroplasty Today 2018 4, 441-446DOI: (10.1016/j.artd.2018.08.001) Copyright © 2018 Terms and Conditions

Figure 5 The DePuy Pinnacle acetabular component with neutral polyethylene liner is shown here, (a) direct view highlighting the absence of antirotation tabs in every other position (red arrow), (b) side view demonstrating the elevation of the polyethylene edge over the acetabular shell, and (c) oblique view showing the antirotation steps sitting flush while the polyethylene edge is elevated. Arthroplasty Today 2018 4, 441-446DOI: (10.1016/j.artd.2018.08.001) Copyright © 2018 Terms and Conditions