The orthodontic profession is experiencing a new era. The introduction of 3D imaging is revolutionizing orthodontic diagnostic philosophy. This philosophy emphasizes the importance of implementing the prospective treatment analysis concept and its triad of ERA, SA, and TA (End Result Analysis, Subtraction Analysis, and Treatment Analysis). The question is whether we have the armamentarium for this triad and if we are ready for PTA? World J Orthod 2009;10:123–124.