What is MSE & MARPE Expansion?
MSE (maxillary skeletal expansion) and MARPE (miniscrew-assisted rapid palatal expansion) use a custom expander anchored with tiny miniscrews to widen a narrow upper jaw at the bone level. They can correct crossbites and create room for crowded teeth in teens and adults — often avoiding jaw surgery that adult expansion used to require.
Medically reviewed by Dr. Andrey Gaiduchik, DDS · Updated October 2026
What to expect, step by step
- Step 1
Evaluation & 3D imaging
3D imaging shows jaw width and the best miniscrew placement.
- Step 2
Custom expander
An expander is designed from your digital scan.
- Step 3
Placement
The expander is placed with numbing for comfort.
- Step 4
Activation
Small, scheduled turns widen the upper jaw.
- Step 5
Stabilize & finish
The bone sets, then braces or Invisalign align the teeth.
How it compares
| MSE/MARPE | Traditional expander | Surgical expansion | |
|---|---|---|---|
| Ages | Teens & adults | Children | Adults |
| Skeletal change | Yes | Yes (while growing) | Yes |
| Surgery required | No | No | Yes |
Cost and financing
Our team will go over the cost of your treatment and every payment option before you start. We accept most major credit cards and insurance plans, offer interest-free in-house financing, low down payments and monthly plans, and Medi-Cal/Denti-Cal is accepted — come in for an evaluation to see if treatment could be covered.
- Free consultation
- Interest-free in-house financing
- Most insurance accepted
- Medi-Cal / Denti-Cal accepted
Find out if MSE & MARPE Expansion is right for you.
Free evaluations for kids 7+, interest-free payment plans and seven offices across the Sacramento Valley.
MSE & MARPE Expansion FAQs
Does MARPE hurt?
The area is numbed for placement. During expansion most people feel pressure rather than pain.
Will a gap appear between my front teeth?
Often, yes — a temporary gap is a sign the jaw is widening. It closes later in treatment.
Who is a candidate?
Teens and adults with a narrow upper jaw, crossbite or certain airway-related concerns. An evaluation will tell.
How is MSE different from MARPE?
MSE is a specific design of MARPE expander. Both use miniscrews to widen the jaw at the bone level.
Do I still need braces?
Usually. Expansion fixes the jaw width; braces or Invisalign then align the teeth.
Can expansion help breathing?
A wider palate can increase nasal space. We will discuss whether that applies to you — we never diagnose sleep conditions online.
Ask Legendary about MSE & MARPE Expansion
Your first visit is a free consultation.
Free evaluations for kids 7+, interest-free payment plans and seven offices across the Sacramento Valley.