Obstructive Sleep Apnea(OSA) is a condition which can affect any age group including children. International Classification of Sleep Disorders has separately defined OSA in children and adults due to differences in its nature, characteristics and diagnosis. Paediatric OSA is primarily a craniofacial structural issue. This book intends to provide an in depth knowledge to dentists about Paediatric OSA, its diagnosis and management. It focusses on various aspects including pathophysiology, anatomical and non-anatomical contributors, signs and symptoms, methods for diagnosis including various sleep questionnaires specially designed for children, cephalometric analysis and management strategies including orthodontic and dentofacial orthopaedic strategies useful for dentists.