Fig. 1From: Correct positioning of the calcar screw leads to superior results in proximal humerus fractures treated with carbon-fibre-reinforced polyetheretherketone plate osteosynthesis with polyaxial locking screwsRadiological measurement of the distance from the calcar screw to the calcar in an anterior posterior radiograph: a calcar screw distance < 12 mm (group I), b calcar screw distance ≥ 12 mm (group II)Back to article page