Abstract
An-18-year old male patient reported to the Department of Orthodontics, SVS Institute of Dental Sciences, Mahabubnagar, with a chief complaint of irregularly placed upper and lower front teeth and restless sleep. On extra oral examination the patient presented with mild convex profile, competent lips and normal nasolabial angle and mentolabial sulcus with no gross asymmetry. Intraoral examination showed severe crowding in both the arches, Class I molar and canine relationship bilaterally, narrow maxillary arch, blocked out upper right canine, upper right lateral incisor and posterior unilateral cross bites, upper midline shifted to right side by 3mm. Cephalometric examination showed that patient exhibited Class I skeletal jaw bases (ANB: 20) with normal mandibular plane angle (FMA: 260), upright upper anteriors (UI-SN: 1020) retroclined lower anteriors (LI-MP: 720), with normal nasiolabial angle (1080) as shown in [Table/Fig-1]. Model analysis suggested 7mm expansion is possible in the upper arch and 5mm of space can be gained in the lower arch.
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