Which appliance is used to correct anterior crossbite associated with skeletal Class III?

Which appliance is used to correct anterior crossbite associated with skeletal Class III?

• A. Reverse pull headgear
• B. Quad helix
• C. Hyrax appliance
• D. Edgewise

Answer: (A)

When a growing patient has an anterior crossbite due to a relatively deficient maxilla (skeletal Class III), the goal is to move the maxilla forward rather than just move teeth. The reverse-pull headgear, commonly known as a face mask, delivers forward-directed forces to the maxillary complex via elastics attached to a bonded or tabbed appliance on the upper teeth. This orthopedic protraction stimulates forward growth of the maxilla and helps bring the upper incisors over the lowers, reducing the crossbite and improving the skeletal relationship during development. The other options don’t provide this forward protraction. Palatal expanders like quad helix or Hyrax address transverse width rather than sagittal skeletal discrepancy, and an edgewise fixed appliance mainly moves teeth rather than correct the underlying skeletal relationship. Therefore, the reverse-pull headgear is the appropriate choice for correcting anterior crossbite associated with skeletal Class III.

When a growing patient has an anterior crossbite due to a relatively deficient maxilla (skeletal Class III), the goal is to move the maxilla forward rather than just move teeth. The reverse-pull headgear, commonly known as a face mask, delivers forward-directed forces to the maxillary complex via elastics attached to a bonded or tabbed appliance on the upper teeth. This orthopedic protraction stimulates forward growth of the maxilla and helps bring the upper incisors over the lowers, reducing the crossbite and improving the skeletal relationship during development.

The other options don’t provide this forward protraction. Palatal expanders like quad helix or Hyrax address transverse width rather than sagittal skeletal discrepancy, and an edgewise fixed appliance mainly moves teeth rather than correct the underlying skeletal relationship. Therefore, the reverse-pull headgear is the appropriate choice for correcting anterior crossbite associated with skeletal Class III.