Activator

Specification：

The Activator is a functional appliance used to open the bite and move the mandible forward for the correction of Class II malocclusions.It could erupt posterior teeth and change the dental relationship in axial, coronal and sagittal plane.Its components consist of a horseshoe shaped lingual plate and a labial bow.

Important Properties：

1. It redirects the growth of the mandible.
2. It produces favourable effects on Class II malocclusions.

Indications：

1. Class II malocclusions
2. Retrognathic mandible
3. Tooth and jaw abnormalities