Effect of Extraction Versus Non-extraction Orthodontic Treatment on the Third Molars

Inclusion Criteria: * Adolescent males and females (14-18 years) with Bilaterally unerupted developing third molars. Not more than two thirds of the root development of the third molars had taken place. * Dental Class I malocclusion cases requiring four premolar extraction with a moderate anchorage requirement. * low or increased vertical dimension. Exclusion Criteria: * Premolar extraction cases requiring maximum anchorage preparation. * Low vertical dimension. * patients without dentofacial deformities, severe facial asymmetries, or missing teeth.