MSKMRI on Instagram: "📌 Insufficiency Fractures of the Unresurfaced Patella After TKA A Radiologist’s Guide to Vascular Failure, Biomechanics, and Imaging Diagnosis Why It Matters Insufficiency fractures of the native patella after TKA are rare yet often underdiagnosed. They reflect biomechanical overload on ischemic, metabolically weakened bone, not trauma. Radiologists frequently identify these injuries before symptoms become evident. 1. Vascular Failure Medial parapatellar arthrotomy disrupt