What is two-phase orthodontic treatment?

Two-phase treatment splits care into two separate courses with a break in between. Phase 1 happens while your child still has a mix of baby and permanent teeth, usually somewhere between 7 and 10, and it deals with how the jaw is developing and whether there’s room for the permanent teeth on the way. Then comes a resting period while growth continues. Phase 2 is full treatment once the permanent teeth are in, typically in the early teens.

Does my child really need Phase 1, or can we wait and do it all at once?

Often you can wait, and Dr. Varble will tell you when that’s the case. Phase 1 earns its place when there’s a growth or spacing problem that gets meaningfully harder to correct later, like a narrow upper jaw, a crossbite, or permanent teeth with nowhere to erupt. Those are the cases where being early changes the result, not just the schedule. If your child isn’t one of them, starting early adds cost and appointments without improving the outcome, and he’d rather say that than start treatment.

How long is the gap between Phase 1 and Phase 2?

It depends on your child’s growth, which is why there’s no standard number. For some kids it’s about a year, for others closer to three. The gap isn’t idle time. Dr. Varble tracks growth through the resting period with periodic check-ins at the Creve Coeur or St. Peters office, so Phase 2 begins when the mouth is actually ready rather than on a date chosen in advance.

If we do Phase 1, will my child still need braces as a teenager?

Usually yes, and this is the most common misunderstanding about two-phase treatment. Phase 1 isn’t a shortcut around braces later. It’s groundwork that makes Phase 2 more straightforward and, in some cases, keeps more invasive options like extractions off the table. If anyone tells you early treatment means your child won’t need braces as a teenager, be skeptical.

What does Phase 1 actually involve?

It depends on what’s being corrected. Most often it’s an expander to widen the upper jaw, partial braces on a few teeth, or both. Phase 1 is generally a matter of months rather than years, and it’s a narrower job than full treatment. Dr. Varble will show you what he’s looking at and explain what the appliance is meant to accomplish before anything goes on.

TWO-PHASE TREATMENT

Orthodontic treatment in two stages, years apart.

For some children, the best result comes from treating in two rounds: a shorter early phase to address specific issues, followed by comprehensive treatment a few years later once permanent teeth come in.

Book Free VO Smile Assesment →Learn More About Your First Visit

Overview

What two-phase treatment actually means

The name simply describes the structure: two separate rounds of orthodontic treatment, with a gap of a few years in between while permanent teeth continue to come in.

Phase 1 is a shorter, targeted treatment in early childhood, usually between ages 7 and 9. It corrects a specific issue, like a crossbite, jaw discrepancy, or severe crowding, while the jaw is still growing.

Phase 2 is the comprehensive treatment most people picture, typically starting between ages 11 and 14 once most permanent teeth have erupted. This is where the full smile is built.

EARLY VS COMPREHENSIVE TREATMENT

Two phases, different purposes

Most kids only need one phase of treatment. A smaller group benefits from early intervention followed by comprehensive treatment later. Here’s the difference.

Phase 1

Early Intervention

Typically ages 7 to 9

Phase 1 is a focused, time-limited treatment that addresses a specific developmental issue before all the permanent teeth come in. It’s not about straightening every tooth, it’s about correcting a problem that’s easier to address now than later.

Duration

Usually 6 to 12 months of active treatment, followed by retention while the rest of the permanent teeth come in.

WHAT IT INVOLVES

A palate expander, partial braces, or another targeted appliance
Routine adjustment visits every few weeks
A retainer at the end to hold the result
Growth monitoring visits leading into Phase 2

Phase 2

Comprehensive Treatment

Typically ages 11 to 14

Phase 2 is the full orthodontic treatment that aligns all the permanent teeth and builds the finished smile. Because Phase 1 already corrected the underlying issue, Phase 2 is often shorter and more predictable than it would have been otherwise.

Duration

Typically 12 to 18 months, depending on the case.

WHAT IT INVOLVES

Damon Ultima brackets or Spark Clear Aligners
DentalMonitoring at home, reducing in-office visits
Periodic in-office adjustments as needed
Retainers to maintain the result long-term

THE FULL JOURNEY

What treatment looks like across both phases

Two-phase treatment unfolds over several years. Here’s the typical timeline from first evaluation to final retainer.

Phase 1 begins

AGES 7 TO 9

An appliance, expander, or partial braces is placed to address the specific issue. Treatment lasts 6 to 12 months.

Resting period

AGES 9 TO 11

Phase 1 is complete. Your child may wear a retainer while remaining permanent teeth come in. We see them periodically for growth checks.

Phase 2 begins

AGES 11 TO 14

Comprehensive treatment with Damon Ultima brackets or Spark aligners. Typically 12 to 18 months of active treatment.

Retention

AFTER PHASE 2

Custom retainers maintain the final result. Most patients wear them nightly long-term to keep the smile stable.

Investment

Straightforward answers on cost

Insurance & Financing

We work with most major insurance plans and offer in-house financing with flexible monthly payment options. We’ll walk you through all of it at your consultation.

See insurance & financing options →

APPLIANCES & APPROACH

What Phase 1 treatment looks like day to day

Phase 1 is usually lighter than parents expect. It’s rarely a full set of braces. More often, it’s a single targeted appliance designed to address one clinical goal.

Palate expanders

Widen the upper jaw gradually over a few months. Worn 24 hours a day. Most kids adjust within days.

Partial braces

Brackets placed only on the teeth that need to move, usually just the front teeth. Faster and lighter than a full set of braces.

Targeted appliances

Smaller, specialized appliances designed for specific issues like habit correction or jaw guidance.

DentalMonitoring when applicable

For braces-based Phase 1 cases, weekly at-home scans reduce office visits and let us track progress without disrupting school.

REAL FAMILIES, REAL RESULTS

The proof is in the smiles

COMMON QUESTIONS

What parents ask most

What is two-phase orthodontic treatment?
Two-phase treatment splits care into two separate courses with a break in between. Phase 1 happens while your child still has a mix of baby and permanent teeth, usually somewhere between 7 and 10, and it deals with how the jaw is developing and whether there’s room for the permanent teeth on the way. Then comes a resting period while growth continues. Phase 2 is full treatment once the permanent teeth are in, typically in the early teens.
Does my child really need Phase 1, or can we wait and do it all at once?
Often you can wait, and Dr. Varble will tell you when that’s the case. Phase 1 earns its place when there’s a growth or spacing problem that gets meaningfully harder to correct later, like a narrow upper jaw, a crossbite, or permanent teeth with nowhere to erupt. Those are the cases where being early changes the result, not just the schedule. If your child isn’t one of them, starting early adds cost and appointments without improving the outcome, and he’d rather say that than start treatment.
How long is the gap between Phase 1 and Phase 2?
It depends on your child’s growth, which is why there’s no standard number. For some kids it’s about a year, for others closer to three. The gap isn’t idle time. Dr. Varble tracks growth through the resting period with periodic check-ins at the Creve Coeur or St. Peters office, so Phase 2 begins when the mouth is actually ready rather than on a date chosen in advance.
If we do Phase 1, will my child still need braces as a teenager?
Usually yes, and this is the most common misunderstanding about two-phase treatment. Phase 1 isn’t a shortcut around braces later. It’s groundwork that makes Phase 2 more straightforward and, in some cases, keeps more invasive options like extractions off the table. If anyone tells you early treatment means your child won’t need braces as a teenager, be skeptical.
What does Phase 1 actually involve?
It depends on what’s being corrected. Most often it’s an expander to widen the upper jaw, partial braces on a few teeth, or both. Phase 1 is generally a matter of months rather than years, and it’s a narrower job than full treatment. Dr. Varble will show you what he’s looking at and explain what the appliance is meant to accomplish before anything goes on.