Nontraumatic fracture of the polyethylene tibial post in a bi-cruciate stabilized total knee prosthesis Daan Renson, MD, Wouter Lenaerts, MD, Johan Feyen,

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Nontraumatic fracture of the polyethylene tibial post in a bi-cruciate stabilized total knee prosthesis Daan Renson, MD, Wouter Lenaerts, MD, Johan Feyen, MD Arthroplasty Today Volume 5, Issue 3, Pages 284-287 (September 2019) DOI: 10.1016/j.artd.2019.06.001 Copyright © 2019 Terms and Conditions

Figure 1 Preoperative imaging of the right knee in 90° flexion (left) and 115° hyperflexion (right). The red line represents the posterior border of the tibia. Arthroplasty Today 2019 5, 284-287DOI: (10.1016/j.artd.2019.06.001) Copyright © 2019 Terms and Conditions

Figure 2 Intraoperative imaging of the tibial insert. The broken fragment of the polyethylene post was found in the intercondylar notch (a). The anterior (b) and top view (c) of the tibial insert show no additional wear patterns on the articulating surfaces. Arthroplasty Today 2019 5, 284-287DOI: (10.1016/j.artd.2019.06.001) Copyright © 2019 Terms and Conditions

Figure 3 Tibial post mechanism in a conventional TKA (left) and the post-cam mechanism in the BCS design (right). Arthroplasty Today 2019 5, 284-287DOI: (10.1016/j.artd.2019.06.001) Copyright © 2019 Terms and Conditions