In case of comminution, the assessment of rotation is exceedingly more difficult.
Limb length can be established by preoperative measurement of the contralateral limb.
Rotation can be assessed with a physical examination of the contralateral extremity and radiographs of the femur and hip to create a preoperative template.
One method of preoperative radiographic templating is to obtain a direct lateral radiograph of the knee and a radiograph in the AP plane of the hip at 90° orthogonal to the first knee x-ray.
The profile of the lesser trochanter should be radiographically similar once reduction is complete.