Establishing the soft and hard tissue area centers [centroids] for the skull and introducing a new non-anatomical cephalometric line

The purpose of this study was to demonstrate how to establish the area center [centroid] of both the soft and hard tissues of the outline of the lateral cephalometric skull image, and to introduce the concept of a new nonanatomical centroid line. Lateral cephalometric radiographs, size 12 X 14 inch, of fifty seven adult subjects were selected based on their pleasant, balanced profile, Class I skeletal and dental relationship and no major dental malocclusion or malrelationship. The area centers [centroids] of both soft and hard tissue skull were practically established using a customized software computer program called the "m-file". Connecting the two centers introduced the concept of a new non-anatomical soft and hard centroids line