7 Signs Your Child Needs Orthodontic Treatment Before Age 12

Most parents assume that orthodontic treatment starts in the early teens. This assumption leads to missed opportunities.

Early orthodontic intervention, what orthodontists call Phase 1 treatment, is designed for children aged 6 to 12. It works with the growing jaw and uses that growth to correct problems that would otherwise require far more extensive treatment later — or would be impossible to address without jaw surgery in adulthood.

These seven signs in children aged 6 to 12 indicate that an orthodontic evaluation should happen now, not at 16.

Sign 1: Thumb Sucking Past Age 5

Thumb sucking is normal in very young children. When the habit persists beyond age 5 — particularly if it continues when the permanent teeth are erupting — it creates mechanical pressure that can push the upper front teeth forward, flare the incisors, and create an open bite where the upper and lower front teeth do not meet when the mouth is closed.

The earlier this is addressed, the less structural damage accumulates. If the open bite has already begun to develop, early treatment can guide the erupting permanent teeth into a better position before the pattern becomes established.

Sign 2: Difficulty Chewing or Biting

If your child consistently avoids certain foods, chews only on one side, or tilts their head to bite, something is affecting their bite function.

Functional asymmetry in chewing can cause uneven jaw development. It may signal a crossbite, posterior open bite, or significant crowding that is creating a functional imbalance. An orthodontic evaluation can identify whether the issue has a structural cause that requires early intervention.

Sign 3: Crowded or Misplaced Teeth

When the first permanent molars and incisors erupt between ages 6 and 8, there is often an early indication of whether there will be enough space for the remaining permanent teeth.

In some cases, early treatment to create space prevents the need for extractions later. In others, monitoring is sufficient and treatment waits until more permanent teeth are in. Only an orthodontist can make that determination.

Our post on 8 ways straight teeth improve oral health explains why addressing crowding matters beyond aesthetics.

Sign 4: Early or Late Loss of Baby Teeth

Baby teeth fall out in a fairly predictable sequence. If a child loses baby teeth significantly earlier than expected — often due to decay or injury — the adjacent teeth can drift into the gap, reducing the space available for the incoming permanent tooth.

Late retention of baby teeth can also cause problems: the permanent tooth may erupt out of position because the primary tooth is blocking its natural path. If your child loses a tooth much earlier or later than their peers, a dental consultation should follow promptly.

Sign 5: Mouth Breathing and Snoring

Habitual mouth breathing in children is often a sign of airway obstruction. It has orthodontic consequences: children who breathe predominantly through their mouths tend to develop a narrower upper arch and greater vertical facial growth.

If your child consistently breathes through their mouth during sleep, snores, or has sleep-disordered breathing, an evaluation that includes both an orthodontist and an ear, nose and throat specialist may be warranted. Early arch expansion can address the narrow palate before it becomes a surgical problem.

Sign 6: Jaw Shifts When Biting Down

Ask your child to close their teeth slowly and watch whether their chin or jaw shifts to one side. This lateral shift on closure is a hallmark sign of a functional shift caused by a posterior crossbite.

Early treatment with a palate expander can address the crossbite, eliminate the functional shift, and allow the jaw to develop symmetrically. Our post on 8 reasons adults choose Invisalign over metal braces illustrates why catching these problems early is far preferable to correcting them as an adult.

Sign 7: Crossbite or Underbite

A crossbite and an underbite are both significantly easier to correct in children than in adults. In growing children, the bones are still malleable and can be guided with relatively simple appliances. By the time growth is complete, the same correction may require jaw surgery.

Why Early Treatment Is Easier and Less Expensive

Phase 1 orthodontic treatment uses the growth window to achieve specific goals: creating space, correcting jaw relationships, eliminating harmful habits, and guiding erupting teeth. These targeted interventions often simplify Phase 2 treatment significantly or eliminate the need for it entirely.

The cost of Phase 1 treatment is substantially lower than the complex orthodontic work — or jaw surgery — that may be required if the same problems are left until adolescence or adulthood.

Visit our orthodontics service page to learn about the evaluation process. Our post on 10 things to know before starting Invisalign also contains useful context for families considering treatment options.