Functional regulator Type I is indicated for which bite pattern?

Functional regulator Type I is indicated for which bite pattern?

• A. In the block distal bite
• B. In the distal bite with protrusion of upper teeth
• C. In the mesial bite
• D. In the crossbite

Answer: (B)

Functional regulator Type I is built for correcting a Class II pattern where the upper front teeth are protrusive and the bite is distal. The appliance works by altering functional muscle forces around the lips and cheeks with acrylic shields and pads that reduce pressure on the maxillary incisors, allowing the mandible to posture more forward and the upper incisors to settle. This combination helps reduce overjet in a distal bite pattern with protrusive upper teeth, which is exactly the scenario described. It’s not intended for mesial bites (Class III) or crossbites, where different mechanics are needed.

Functional regulator Type I is built for correcting a Class II pattern where the upper front teeth are protrusive and the bite is distal. The appliance works by altering functional muscle forces around the lips and cheeks with acrylic shields and pads that reduce pressure on the maxillary incisors, allowing the mandible to posture more forward and the upper incisors to settle. This combination helps reduce overjet in a distal bite pattern with protrusive upper teeth, which is exactly the scenario described. It’s not intended for mesial bites (Class III) or crossbites, where different mechanics are needed.