Compare between bi-maxillary (maxillary and mandibular) posterior dento-alveolar intrusion and maxillary posterior dento-alveolar intrusion as regards open bite closure.

Now, maxillary posterior dento-alveolar intrusion has been validated as a conservative treatment modality for treatment of skeletal open bite in adult patients. However, it was proved that mandibular posterior teeth extrusion take place during the treatment which results in reduction in the amount of open. bite closure. Therefore, the aim of our study is to compare in a randomized clinical trial methodology between maxillary posterior dento-alveolar intrusion and combined maxillary and mandibular posterior dento-alveolar intrusion in terms of anterior open bite closure.

Inclusion Criteria:

• Skeletal open bite with a dental open bite ranging from 3-8 mm.
• Adequate incisal show at rest and on smiling
• Full set of posterior teeth from first premolar to second molar (with the exception of one tooth in one quadrant).

Exclusion Criteria:

• Dental open bites without skeletal components
• Previous orthodontic treatment
• Medically compromised patients