Su et al. propose a 3-type classification of supracondylar periprosthetic femur fractures above TKA based on fracture location relative to the femoral component, then test its reliability across 12 physicians from four subspecialties evaluating 28 cases twice, three months apart.
When you see a periprosthetic supracondylar femur fracture above a TKA, classify it by Su type before planning fixation: Type I allows IMN (only if the femoral box is open), Type II requires a fixed-angle device or open-box retrograde nail, and Type III demands fixed-angle fixation or revision with a stemmed component — component loosening at any type shifts the decision toward revision regardless of fracture level.
Su et al. propose a 3-type classification of supracondylar periprosthetic femur fractures above TKA based on fracture location relative to the femoral component, then test its reliability across 12 physicians from four subspecialties evaluating 28 cases twice, three months apart.
When you see a periprosthetic supracondylar femur fracture above a TKA, classify it by Su type before planning fixation: Type I allows IMN (only if the femoral box is open), Type II requires a fixed-angle device or open-box retrograde nail, and Type III demands fixed-angle fixation or revision with a stemmed component — component loosening at any type shifts the decision toward revision regardless of fracture level.