Fig. 2From: The three-dimensional stable mandibular landmarks in patients between the ages of 12.5 and 17.1 yearsHead orientation before placing landmarks. Frankfort plane is constructed with the X-axis and Y-axis. Sagittal plane is constructed with the Y-axis and Z-axis. Frontal plane is constructed with the X-axis and Z-axis. X = Right (−)-Left (+).Y = Antero (−)-Posterior (+). Z = Superior (+)-Inferior (−).The origin is at point NBack to article page