Optimisation of locking plate fixation methods for periprosthetic fractures

摘要: Periprosthetic fracture (PPF) of the Femur is a common complication hip arthroplasty. With increasing rates total replacements, occurrence periprosthetic fractures expected to rise. These are often challenging treat effectively due technical challenges presented with combination fractured bone and an unstable prosthesis. Failure locking plate fixation around tip stable prosthesis (Vancouver type B1) have been reported clinically, suggesting that further investigation into their treatment needed. This study developed computational model, using experimentally tested specimens validate model. Clear relationships could be identified between experimental results for Intact Femur, replacement (THR) PPF cases. The model predict magnitude strain in hence likelihood fracture, as well assessing relative stiffness different scenarios. was suitable identification prediction changes set comparative cases used comment on biomechanical performances. The angle shown significant effect stabilised construct mechanics specifically, direction has very large stabilisation. Fractures ML were less than LM direction. 45° Medial Lateral case least stabile instrumentation configuration this clearly not optimal case. It recommended orientation should taken account by surgeons when deciding B1 management.