MARPE: Non-Surgical Palatal Expansion for Teens and Adults in NW Portland
MARPE is a modern, non-surgical way to widen a narrow upper jaw — and for many appropriately selected adults, it can produce genuine skeletal change, not just tooth movement. At Bridge City Orthodontics in NW Portland, Dr. Alex Vo uses 3D imaging to determine whether it's a fit for you.
If you've been told your upper jaw is too narrow — or that correcting it as an adult would mean jaw surgery — MARPE may offer another path worth exploring. Short for Miniscrew-Assisted Rapid Palatal Expansion, MARPE uses small titanium anchors placed in the bone of your palate to gradually widen the upper jaw at its natural midline seam (the midpalatal suture). Because the force is delivered through bone rather than your teeth, MARPE can create true skeletal expansion in many older teens and adults — an age range where traditional tooth-borne expanders often produce mostly tooth tipping instead. You may also hear it called MARME or MSE; these terms describe the same general bone-anchored approach.
This is one of the treatments that sets Bridge City apart in NW Portland — many practices don't offer it, and it rewards careful planning. Dr. Vo begins every MARPE evaluation with a comfortable 3D scan (no goopy impressions) and a CBCT image of your palate, because the only way to gauge candidacy is to see how mature the suture down the center of your palate actually is. Not everyone is a candidate — if that seam is too fused, a surgical approach may be the better route. From there, you'll get a straight, imaging-based answer about whether MARPE fits, what to expect, and how it connects to the rest of your care.
Why patients choose it
- Skeletal widening, not just tipped teeth — the miniscrews direct the expansion force into the bone of your upper jaw, so many adults can achieve genuine skeletal change rather than the dental tipping common with tooth-anchored expanders.
- A non-surgical option for many adults — for appropriately selected patients, MARPE can often accomplish in-office what would otherwise require surgically assisted expansion (SARPE), avoiding the operating room, general anesthesia, and surgical recovery.
- Easier on the teeth near the appliance — because the force works through bone anchors rather than your back teeth, MARPE typically puts less outward strain on those teeth and their surrounding gum and bone than a conventional expander.
- Can help create room in a crowded arch — widening the upper jaw may open space that reduces the need for extractions in some cases, though your orthodontist will weigh this against the type and severity of your crowding.
- A possible secondary nasal-breathing effect — widening the upper jaw also widens the floor of the nasal cavity, which some patients notice as easier nasal breathing. This is a possible side effect for some people, not a treatment goal, a guarantee, or a sleep or airway service.
- CBCT-guided planning from the start — Dr. Vo uses 3D imaging to assess your suture, map your bone anatomy, and plan anchor placement, which is central to doing MARPE thoughtfully and well.
What to expect
- 1
3D evaluation and candidacy
We begin with a comfortable digital 3D digital scan (no goopy impressions) and a CBCT image. Dr. Vo assesses how mature your midpalatal suture is and reviews your bone anatomy — the factors that most influence whether MARPE is likely to work for you and where the anchors should go. If you're not a good candidate, we'll tell you and talk through other options.
- 2
Appliance placement
In a single visit, the palate is numbed with local anesthetic and a few small titanium miniscrews are placed to anchor the expander against your jawbone. It's a short in-office procedure, and many patients return to their usual day the same afternoon.
- 3
Active expansion at home
Over roughly two to four weeks, you'll turn a small key as directed to gradually widen the jaw. Most people feel pressure with each turn (over-the-counter pain relievers can help), a temporary lisp, and a small gap that opens between the front teeth — a normal, expected sign the suture is separating.
- 4
Retention, removal, and finishing
Once the planned width is reached, turning stops and the appliance stays in place for several months while new bone fills in across the suture — your orthodontist will give you a timeframe based on your healing. After removal, full treatment with braces or Invisalign typically follows to align your teeth within the wider arch.
A good fit if…
- Older teens and adults with a narrow upper jaw who'd like to avoid jaw surgery if possible
- Patients with a posterior crossbite driven by a narrow upper jaw rather than tooth position alone
- Adults in their 20s and 30s who were told they're 'too old' for a traditional palatal expander
- People with upper-arch crowding where widening the jaw could help create needed space
- Anyone who wants a clear, imaging-based answer on whether non-surgical expansion is realistic for them
Common questions
Am I too old for palatal expansion? I'm in my 30s.
Not necessarily. MARPE was developed specifically to extend non-surgical expansion beyond childhood, and many patients in their 20s and 30s are still good candidates. Success does tend to decline with age as the midpalatal suture matures, so it isn't right for everyone — but age alone isn't an automatic disqualifier. Whether you're a candidate depends on your individual palate anatomy, which is exactly what Dr. Vo evaluates on your CBCT scan before recommending anything.
Is MARPE actually non-surgical?
Yes. The miniscrews are placed in-office with local anesthetic, not in an operating room. That's the key difference from SARPE (surgically assisted rapid palatal expansion), which requires an oral surgeon to make bone cuts under sedation or general anesthesia. For appropriately selected patients, MARPE can achieve skeletal expansion while avoiding that surgery. If your suture is too fused, however, a surgical approach may be the better route — your 3D imaging helps us figure out which is likely the case before we begin.
Why does a gap open between my front teeth, and will it stay?
The gap is expected, and it's a good sign — it means the two halves of your upper jaw are separating at the midline suture, which is the goal. It usually closes over the following weeks to months as the surrounding tissues draw the teeth back together, and the braces or Invisalign that follow are used to close any remaining space and align your bite. So no, it isn't meant to be permanent.
How long will the expander be in my mouth?
It varies by patient, but plan on a short period of active turning (often a few weeks) followed by several months of retention while the appliance stays in place and new bone forms across the widened suture. That retention time matters — removing the appliance too early raises the risk of relapse. Dr. Vo will give you a personalized timeframe based on your imaging and how your bone heals, and full orthodontic treatment usually follows after removal.
Does it hurt?
Most patients describe firm pressure across the upper jaw — sometimes up into the cheeks — with each turn, rather than sharp pain. It's usually manageable with over-the-counter pain relievers taken beforehand and tends to ease within a few hours. A temporary lisp is common in the first week or so and resolves on its own as you adjust. If anything feels off between visits, we want you to call us.
Will MARPE help my breathing or sleep?
Possibly as a secondary effect for some people. Widening the upper jaw also widens the floor of the nasal cavity, and some patients notice easier nasal breathing afterward — but this isn't guaranteed and isn't the reason we'd recommend MARPE, which is an orthodontic treatment for a narrow upper jaw. Bridge City does not treat sleep apnea or airway disorders. If you have significant breathing or sleep concerns, those should be evaluated by an ENT, pulmonologist, or sleep physician.
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