Orthodontic Expansion Devices
Orthodontic expansion widens the upper jaw to create more space and improve the bite. Designed to create space by physically widening the dental arches and/or midpalatal suture.
Traditional Expansion Devices
1. RPE
(Rapid Palatal Expander)
Who it’s for: Younger children with open mid-palatal sutures (usually before age 12)
How it works: A fixed metal appliance bonded to molars with a central screw turned daily to widen the upper jaw
Pros: Effective, quick skeletal change
Cons: May cause discomfort, doesn’t correct function, not suitable for older teens/adults
Brand/Notes: American Orthodontics, Ormco
2. Quad Helix
How it works: Fixed wire appliance with springs to apply gentle, continuous pressure.
Brand/Notes: Custom fabricated by orthodontists/labs
3. W-Arch / Bi-Helix
How it works: Similar to Quad Helix but simpler design; often used for minor expansion or rotation.
Brand/Notes: Custom orthodontic labs
4. Haas Expander
How it works: Acrylic-palate-supported RPE to also push on soft tissues of palate.
Brand/Notes: Commonly fabricated in orthodontic labs
5. Hyrax Expander
How it works: Metal-only RPE without acrylic; more hygienic.
Brand/Notes: Ormco, Dentsply Sirona
6. Fan-Type Expander
How it works: Allows anterior-only expansion, useful for V-shaped palates.
Brand/Notes: Specialty labs or modified RPE designs
7. Schwarz Appliance
How it works: Removable acrylic appliance with midline screw. Slow expansion option.
Brand/Notes: Used in early ortho; custom made
8. NiTi Expander
How it works: Uses nickel-titanium springs to apply continuous gentle force.
Brand/Notes: Forestadent, Ortho Organizers
Skeletal Expansion Devices (for Teens/Adults)
1. MARPE (Mini-Implant Assisted Rapid Palatal Expander)
Who it’s for: Teens or adults with fused palates
How it works: Similar to RPE but uses small temporary implants anchored to the palate for greater skeletal expansion
Pros: Allows true skeletal expansion after puberty
Cons: More invasive, requires oral surgery collaboration
Brand/Notes: Biederman Orthodontics, Ortholox
2. DOME (Distraction Osteogenesis Maxillary Expansion)
Who it’s for: Adults with fully fused sutures, severe constriction
How it works: Expansion paired with oral surgery to split the suture
Pros: Only option for some adults
Cons: Surgical intervention needed
Brand/Notes: Collaborative surgery/ortho case
3. SARPE (Surgically Assisted Expanders)
Who it’s for: Adults with fully fused sutures
How it works: Combines surgical release of the suture with traditional RPE.
Pros: Only option for some adults
Cons: Surgical intervention needed
Brand/Notes: Typically done in oral surgery/ortho collab
Which One Does My Child Need?
There is no one-size-fits-all solution. Our team evaluates each child’s breathing, oral function, posture, jaw growth, and sleep to make the best plan. Often, a combination of therapies and appliances—coordinated with your dentist, orthodontist, or ENT—is the most effective approach.