Activators are suitable for which type of divergence?

Activators are suitable for which type of divergence?

• A. Hypo (Low Angle)
• B. Hyper (High Angle)
• C. Normal Angle
• D. Mid Angle

Answer: (A)

Activators work by posturing the mandible forward to guide growth, and the vertical effect of that forward posturing depends on the patient’s vertical pattern. In hypo-divergent (low-angle) individuals, the jaw angle is relatively flat, so forward advancement can occur with only modest vertical change. This allows effective sagittal correction without undesirable increases in facial height. In hyper-divergent (high-angle) patients, the same forward positioning tends to increase vertical dimension, which can worsen a long-face/open-bite pattern, making activators less suitable. So, activators are best suited for low-angle divergence.

Activators work by posturing the mandible forward to guide growth, and the vertical effect of that forward posturing depends on the patient’s vertical pattern. In hypo-divergent (low-angle) individuals, the jaw angle is relatively flat, so forward advancement can occur with only modest vertical change. This allows effective sagittal correction without undesirable increases in facial height. In hyper-divergent (high-angle) patients, the same forward positioning tends to increase vertical dimension, which can worsen a long-face/open-bite pattern, making activators less suitable. So, activators are best suited for low-angle divergence.