And How Do You Know It’s Working?
This is one of the most commonly asked questions we get from parents.
Let’s break it down!
What Is a Palatal Expander and Why Is It Used?
A palatal expander is an orthodontic appliance designed to gently widen the upper jaw. It’s most commonly used in children and teens whose jaws are still growing.
Expanders help:
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Create space for crowded or blocked out teeth
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Correct crossbites
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Improve how the upper and lower teeth fit together
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In most cases, reduce the need for extractions later on
So How Long Does a Palatal Expander Stay In?
Depending on the case your Orthodontist will let you know how many turns to do and how long it stays in. Most expanders stay in for about 6–9 months total. This time is usually divided into two phases:
1. Active Expansion Phase (about 2–4 weeks)
This is when you are turning the expander as instructed. The upper jaw is actively widening during this time.
2. Retention Phase (several additional months)
Once the expansion is achieved, the expander stays in place without turning. This allows the bone to stabilize and prevents relapse.
Even though turning stops early, keeping the expander in is crucial for long-term success so there is no relapse.
How Do You Know the Expander Is Working?
There are several clear signs — some you can see at home, and others we monitor in the office.
Signs You May Notice at Home
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A small space between the front teeth
This is very common and actually a great sign that expansion is happening. -
Changes in the bite
Teeth may touch differently as the jaw widens. -
Improved arch shape
The smile may look broader over time.
How Orthodontists Confirm Progress
The Orthodontist will confirm expansion through:
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Clinical exams
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Progress photos
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Digital scans or measurements
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Bite evaluation and symmetry checks
These tools allow us to precisely track changes and ensure the expansion is happening safely and effectively. At the check up appointment we will determine if more turns are needed.
What Happens After the Expander Comes Out?
Once expansion is complete and stable:
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The expander is removed
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The next phase of orthodontic treatment begins (braces or clear aligners, depending on the plan and if its Phase 1 or Phase 2)
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Teeth are guided into their final, ideal positions
The expander sets the foundation — the rest of treatment builds on it.
Why Timing and Monitoring Matter
When expansion is started during growth and carefully monitored by a board-certified orthodontist, the upper jaw responds more efficiently and predictably.
Regular check-ins allow us to confirm that the expander is working as planned, make adjustments if needed, and ensure the changes are stable before moving on to the next phase of treatment.
Wearing the expander for the full recommended time — even after active turning is complete — is critical. This retention phase allows new bone to form and mature, helping prevent relapse and setting a strong foundation for braces or clear aligners later on. With proper timing and close monitoring, palatal expansion can simplify future orthodontic treatment and support long-term, healthy results.
At your complimentary consultation we will review all the details! : )
