What is the Herbst appliance, and what changes does it typically produce?

What is the Herbst appliance, and what changes does it typically produce?

• A. A removable functional appliance that requires patient wear.
• B. A fixed functional appliance that postures the mandible forward to correct Class II; produces skeletal and dental changes with no practitioner compliance required.
• C. A fixed appliance that retracts the mandible backward.
• D. A headgear variant.

Answer: (B)

The Herbst appliance is a fixed functional appliance that postures the mandible forward to correct a Class II malocclusion. Because it’s fixed, it doesn’t rely on patient cooperation for wear. It produces both skeletal changes—forward positioning of the mandible and related growth effects—and dental changes as the teeth adapt to the new jaw relationship. It’s not removable and it isn’t a retracting device or a headgear variant, which is why the fixed forward-posturing description best fits.

The Herbst appliance is a fixed functional appliance that postures the mandible forward to correct a Class II malocclusion. Because it’s fixed, it doesn’t rely on patient cooperation for wear. It produces both skeletal changes—forward positioning of the mandible and related growth effects—and dental changes as the teeth adapt to the new jaw relationship. It’s not removable and it isn’t a retracting device or a headgear variant, which is why the fixed forward-posturing description best fits.