Facial morphology is unique to every individual in world. Preformed arch wires are used by clinician regardless of arch width and shape and vertical facial morphology which leads to relapse. Hence, present study is designed to investigate the gender differences in dental arch width and also to correlate it with vertical facial morphology in untreated adults of 17- 25 years of age irrespective of sagittal indicators. Jarabak’s ratio and steepness of mandibular plane angle (GoGn to SN) was measured by FACAD orthodontic tracing software version 3.11 on lateral cephalograms of each subject. Directdental arch width measurements of maxillary and mandibular intercanine, interpremolar, and intermolar widths were obtained individually by Vernier calipers on study model. The arch width of males and females were analyzed and the differences between them were tested for significance using a Student's t-test. It was concluded that dental arch width is associated with gender and vertical facial morphology. Thus, using individualized arch wires according to each subject's pre-treatment arch width and form is recommended.
