In most cases, a toddler’s open bite will correct itself, but only if the habit causing it stops early enough. The key factor is what’s behind the open bite: if it’s driven by pacifier use or thumb sucking, removing that habit before age 3 gives the teeth a high chance of drifting back to normal on their own within a few months. If the habit continues past age 3 or 4, or if the open bite has a skeletal component related to jaw growth patterns, self-correction becomes less predictable.
What an Open Bite Actually Is
An anterior open bite means the upper and lower front teeth don’t overlap when your child bites down. There’s a visible gap between them even with the back teeth fully closed. In toddlers, this is one of the most common bite issues, and the cause is almost always one of a few things: pacifier use, thumb or finger sucking, or mouth breathing related to enlarged tonsils or adenoids.
The cause matters because it determines whether the bite can fix itself. Open bites driven by sucking habits are dental in nature, meaning the teeth have been pushed out of position by repeated pressure but the underlying jaw structure is fine. A smaller number of open bites are skeletal, involving the way the jaw itself is growing. Skeletal open bites are linked to genetics and specific growth patterns that create a longer lower face, and these don’t self-correct.
The Role of Sucking Habits
Pacifiers and thumb sucking create open bites through simple mechanics. The object sits between the front teeth for hours each day, preventing them from coming together normally while also pushing the upper teeth forward. The longer and more frequently a child sucks, the more pronounced the gap becomes.
Once the habit stops, the pressure is removed and the teeth are free to shift back. But there’s a catch. When an open bite has been present for a while, the tongue often fills the gap. This is called tongue thrusting, where the child pushes their tongue forward against or between the front teeth during swallowing. It’s actually a natural adaptation: the tongue moves forward to create a seal that the teeth can no longer provide. The problem is that this new tongue posture can keep the open bite in place even after the pacifier or thumb is gone.
What the Research Says About Self-Correction
A systematic review published in the European Journal of Orthodontics looked specifically at whether open bites close on their own after kids stop their sucking habits. The findings were encouraging: improvement ranged between 50 and 100 percent across the studies reviewed. Self-correction happened even in children older than 4, though the evidence for older kids was less certain. The reviewers couldn’t pinpoint an exact age after which self-correction becomes unlikely.
The timeline depends on when the habit stops. If your child drops the pacifier or thumb before age 3, you can typically expect visible improvement within 3 to 6 months, and many of these cases fully correct on their own. If the habit stops between ages 3 and 4, recovery takes longer, usually 6 to 12 months, and the correction may be partial rather than complete. If you don’t see meaningful change about a year after the habit ends, that’s a signal to follow up with a dentist.
The Age 3 Threshold
The American Academy of Pediatric Dentistry recommends weaning pacifiers by 36 months. Their data shows that children using a pacifier for 36 months or longer have a significantly higher rate of open bite compared to non-users, and that an open bite associated with pacifier use will generally improve after the pacifier is eliminated before age 3.
There’s actually an even earlier consideration. The AAPD notes that pacifier use after 18 months, when the canine teeth start emerging, can begin influencing the developing bite structure. So while 36 months is the firm recommendation, limiting pacifier use from around 18 months onward reduces the risk of bite problems developing in the first place. Pacifier use after 12 months also increases the risk of ear infections, which gives parents another reason to start tapering early.
When Self-Correction Is Less Likely
A few situations lower the odds that an open bite will close on its own. If the habit persists past age 4 or 5, the teeth and surrounding bone have had more time to adapt to the abnormal position, making natural correction harder. If your child breathes through their mouth most of the time, possibly due to enlarged tonsils or adenoids, that pattern can maintain the open bite independently of any sucking habit. Mouth breathing tends to push the jaw into a position that favors an open bite, and it won’t resolve until the breathing issue is addressed.
A skeletal open bite, where the jaw itself is growing in a pattern that creates the gap, won’t self-correct regardless of habits. These cases tend to run in families and are associated with a noticeably longer lower face. A pediatric dentist can usually tell the difference between a dental and skeletal open bite with a clinical exam, and imaging can confirm it if there’s any question.
What Happens If It Doesn’t Close
If the open bite sticks around, there are several intervention options depending on your child’s age. For younger children still in baby teeth, a common approach is a palatal crib. This is a small metal appliance attached to the upper back teeth that sits behind the front teeth. It serves as a physical barrier that keeps the tongue from pushing forward, essentially retraining the tongue to rest in the correct position. These appliances are effective at breaking the tongue thrust pattern that often keeps an open bite from closing.
For milder cases or when the main issue is tongue posture, exercises that retrain the muscles involved in swallowing can help. These are sometimes done with a speech therapist or myofunctional therapist.
The American Association of Orthodontists recommends that all children have their first orthodontic evaluation by age 7. By that point, enough permanent teeth have come in to assess whether an open bite is resolving or whether it’s becoming a longer-term issue. For most toddlers with habit-related open bites, though, this evaluation is years away, and the bite has plenty of time to improve before then.
Does Open Bite Affect Speech?
Parents often worry that an open bite will cause speech problems, particularly with sounds like “s,” “z,” and “th” that require the tongue to interact with the front teeth. Interestingly, research hasn’t found a strong direct link between open bite and speech disorders in young children. A study comparing children with and without open bites found no significant association between the bite issue and speech errors. That said, a persistent tongue thrust habit can independently affect articulation, so addressing the underlying habit serves both dental and speech development.
What to Do Right Now
If your toddler has an open bite, the single most important step is identifying and removing the habit causing it. For pacifier users, aim to wean by age 3 at the latest, ideally starting the process closer to 18 months. For thumb suckers, gentle redirection and positive reinforcement tend to work better than punishment or constant reminders, which can turn it into a power struggle.
Once the habit is gone, watch and wait. Take note of whether the gap between the front teeth is shrinking over the following months. If you haven’t already, establish a relationship with a pediatric dentist who can monitor the bite at regular checkups and flag any signs that the open bite is skeletal rather than dental. Most parents who catch this early and address the habit will see the bite improve without any appliances or treatment at all.