Effect of T4K Versus Twin Block in Developing Class II Division I Malocculsion

The Effect of T4K Versus Twin Block in Developing Class II Division I Malocculsion (Randomized Controlled Clinical Trial)

The aim of this study was to evaluate and compare the effect of myofunctional trainer T4K versus twin block functional appliance on the dentoalveolar changes in children with class II division I malocclusion

This study was a parallel arm randomized comparative clinical trial including 20 healthy children age ranged from 9-12 years showing Angle's class II division I malocclusion due to mandibular retrusion. Preoperative photographs, radiographs and study casts were taken, children were randomly assigned into two groups according to the appliance used; Group 1: T4k, and Group II: twin block. Follow up was done every 4 weeks for 9 months. Postoperative cephalometric X ray, study casts and photographs were retaken for measurements and comparison.

Inclusion Criteria:

• Angle's class II division I malocclusion due to mandibular retrusion depending on clinical judgement and confirmed with the lateral cephalometric X-ray.
• Parental written consent was secured.

Exclusion Criteria:

• Patients with mandibular shifts.
• Patients with severe crowding.
• Patients with anterior open bite.
• Patients with posterior crossbite.
• Patients with any peri-oral habits.
• Patients who had received any previous orthodontic or orthopaedic treatments.