Numerous cephalometric norms or standards have been given in past for various population in terms of age and ethinic origin. An accurate sagittal jaw relationship is critically important in orthodontic diagnosis and treatment planning. Various angular and linear measurements have been proposed that can be inaccurate because they depend on various factors. [1,2] For example Wits appraisal, ANB angle and nasion perpendicular are currently used by practitioners to diagnose the sagittal jaw relationship but all of these measurements have their limitations.McNamara's main goal in his analysis was to relate the teeth, jaws, and cranial bases to each other. [3] "Nasion Perpendicular to Frankfort Horizontal" is considered in his analysis but limitations include cases where the anteroposterior (A-P) position of nasion is more posterior thus nasion perpendicular is not accurate, and, therefore, an adjustment in the value should be made. [4] Jacobson's Wits appraisal is accurate for determining a discrepancy, but it is unable to determine which jaw is the discrepant. In his analysis accurate construction of the functional occlusal plane is of vital importance and the difficulty of accurately constructing results in a false appraisal of the jaw relationship, [4] also Chang reported that the Wits appraisal was found to evaluate the sagittal dental relationship along the occlusal plane and not the skeletal relationship. [5] Steiner proposed using nasion as the base for angular measurements to determine the position of the maxilla and mandible sagittally. [6] He used the ANB angle because it described the relationship between the maxilla and the mandible but

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