Activator is made of plastic that covers the teeth of both arches and the palate.

Activator is made of plastic that covers the teeth of both arches and the palate.

• A. True
• B. False
• C. It covers only the maxillary arch
• D. It covers only the mandibular arch

Answer: (A)

The central idea is how an Activator is designed to influence jaw position. It’s a removable functional appliance used to treat Class II malocclusion by posturing the mandible forward, and its acrylic component typically covers the teeth of both arches and the palate. This full-coverage design helps guide the lower jaw forward when the patient bites and provides stability, with the palatal part aiding retention and helping control tongue position. Because the appliance engages both arches and the palate, the statement is true.

The central idea is how an Activator is designed to influence jaw position. It’s a removable functional appliance used to treat Class II malocclusion by posturing the mandible forward, and its acrylic component typically covers the teeth of both arches and the palate. This full-coverage design helps guide the lower jaw forward when the patient bites and provides stability, with the palatal part aiding retention and helping control tongue position. Because the appliance engages both arches and the palate, the statement is true.