MCNAMARA’S CEPHALOMETRIC NORMS OF EGYPTIAN CHILDREN

Abstract

Objective: To establish McNamara Cephalometric Analysis normative data for Egyptian children. Materials and Methods: Twenty boys and forty girls (mean age 9.37, SD 1.60) of Egyptian ethnicity were selected based on the following criteria: Class I molar relationship, lack of crossbite or scissor-bite, adequate amount of space in dental arches, no visible asymmetry, and good facial proportions. Eleven selected variables from McNamara’s cephalometric method were digitally traced and analyzed on the lateral cephalograms of each subject. Results: McNamara’s skeletal and dental variables were assessed and statistically significant inter-gender differences were noted in both effective midface length (condylion to point A) and effective mandibular length (condylion to gnathion). Conclusions: Young Egyptian boys had a lengthier midface and mandible than girls. The Upper incisors to point A vertical and lower incisor to A-PO line were slightly more pronounced in girls.