Ries and O’Neill method for determining bony deformity from anteroposterior and lateral radiographs. A, Tibial fracture angulated in plane between anteroposterior (AP) and lateral (LAT) planes. B, Angles formed by tibial fracture. CAD is the angle shown on anteroposterior view, CAB is the angle shown on lateral view, and CAE is the angle in the true plane (T) of deformity.