Assessment of Severity of Malocclusion and Orthodontic Treatment Need Using the Dental Esthetic Index and Angle's Classification: A Retrospective Study.

Introduction: Angle's classification is the most widely used instrument for evaluation of malocclusion. The dental esthetic index (DAI) is a reliable, valid, and universally accepted cross-cultural index adopted by the World Health Organization (WHO) that links objective, clinical, and subjective esthetic factors to produce a single score that reflects the severity and the treatment needs of the malocclusion. The present study aims to evaluate Angle's classification and DAI to assess the severity of malocclusion and treatment needs.