Inclusion Criteria:  Healthy post pubertal female patients of age range 14 to 16 years old, manifesting features of post pubertal cervical vertebrae maturational stages 4, 5 and 6 (deceleration, maturation, and completion). Skeletal class 2 malocclusion of ANB angle greater than 4° with retrognathic mandible. Class II division 1 malocclusion with at least an end-on Class II molar relationship. Presence of all permanent dentition excluding third molars. Good oral hygiene.  Exclusion Criteria:  History of previous orthodontic treatment. Any systemic disease that could affect the orthodontic treatment. Patients with periodontal diseases. Patients with temporomandibular disorders.