CEPHALOMETRIC NORMS FOR PAKISTANI SAMPLE FOR THE SKELETAL VARIABLES OF MCNAMARA ANALYSIS
Objective of the study was to determine cephalometric skeletal norms for Pakistani sample according to McNamara analysis.
It was a cross-sectional study, conducted on the standardized lateral cephalometric radiographs of 28 males and 72 females. Subjects falling in the age range of 18 to 23 years, having skeletal Class I jaw relationship, normal vertical dimension and no history of orthodontic treatment were included in the study. Lateral cephalometric radiographs were traced and McNamara analysis was performed. Both the maxilla (-0.2±3.7mm) and mandible (-5.9±1.3mm) were positioned backward. The mean of effective mandibular length and Frankfort to mandibular plane angle were found to be 124±6.6mm and 25.0°±4.6° respectively. The mean values of cephalometric variables for Pakistani adults were significantly larger than the McNamara established norms. The current study results showed statistically significant differences in most cephalometric values of McNamara Analysis, between Pakistani adults and McNamara established norms. Pakistanis have distinct cephalometric values, therefore, for Pakistani Orthodontic and Orthognathic surgery patients it is advisable to use these as a standard in treatment planning.
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