Fig. 5From: Morphologic evaluation of root resorption after miniscrew assisted en mass retraction in adult bialveolar protrusion patientsThe segmentation of each tooth. a The root was divided into vertical thirds: cervical, middle and apical thirds b two perpendicular planes along mesial-distal and labial-palatal direction divide each tooth into four sectors c tooth is divided 12 segments d enlarged drawing of CBack to article page