Obstructive sleep apnoea [OSA] syndrome is defined as a disorder of breathing during sleep characterised by prolonged partial upper airway obstruction or intermittent obstructive apnoea that disrupts normal ventilation during sleep and healthy sleep patterns. It is a highly prevalent medical disorder and a challenge to treat. Dentists playa vital role in the identification of risk factors by screening patient for OSA syndrome through appropriate history taking, general and physical examination and evaluation of the anatomy of oral cavity and jaws during dental visits Patients with OSA may exhibit both extraoral and intraoral features such as adenoid facies, high-arched palate, unilateral or bilateral crossbite, macroglossia, micrognatia and retrognatia.