Pharyngeal Airway Dimensions With Twinblock Versus Myobrace Appliances in Developing Skeletal Class II Patients

Cephalometric Changes in Pharyngeal Airway Dimensions After Functional Treatment With Twinblock Versus Myobrace Appliances in Developing Skeletal Class II Patients: A Randomized Clinical Trial

The goal of this clinical trial is to compare the pharyngeal airway changes after treatment with Myobrace and after treatment with Twinblock in developing skeletal Class II patients.

The main question it aims to answer is: Is the efficacy of the twin-block Vs Myobrace appliances in the improvement of pharyngeal airway dimensions in adolescents having skeletal Class II malocclusion with retrognathic mandible utilizing sagittal pharyngeal airway area measurements.

Inclusion Criteria:

• Healthy children
• 9-12 Years
• Skeletal Class II with mandibular defeciency and normal maxillary growth depending on clinical diagnosis and confirmed with lateral cephalometric x-reay readings ( ANB angle >4 and SNA angle <78)

Exclusion Criteria:

• Previous Orthodontic treatment
• Previous extractions
• mandibular shifts
• Severe Crowding
• Anterior open bite
• Any perioral habits