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Technique guide are not considered high yield topics for orthopaedic standardized exams including the ABOS, EBOT and RC.
A 66-year-old female presents with knee instability going down stairs 18 months after a posterior cruciate retaining total knee arthroplasty. She reports having recurrent effusions. Radiographs are shown in Figure A. What is the most likely cause for her instability?
Intraoperative rupture of the patellar tendon
Alteration of the joint line
Posterior cruciate insuffiency
Anterior cruciate insufficiency
Catastrophic component loosening
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