Discussion
fracture, fractures
EVANS, IMPACTION
Only few studies have assessed screw fixation and fracture migration in pertrochanteric fractures using RSA. The key-finding in this RSA study was similar and low migration of lag screws with HA-coated and NON-coated threads of a SHS in the femoral head/neck fragment in stable (Evans type I, II, IV) pertrochanteric hip fractures. Moreover, fracture migration was observed primarily in the first 6 weeks after surgery as femoral head distal migration, anterior rotation, and fracture impaction.