Fig. 1From: In response to letter to the editor: calcar fracture gapping: a reliable predictor of anteromedial cortical support failure after cephalomedullary nailing for pertrochanteric femur fracturesMeasuring calcar fracture gap and cortical step at the anteromedial inferior corner after fracture reduction and cephalomedullary nailing, using immediate post-operative fluoroscopic image. The proximal nail diameter is used as calibratorBack to article page