If your child’s front teeth don’t touch when they bite down, you may be looking at an anterior open bite. In this type of open bite in children, the back teeth meet, but a vertical gap remains between the upper and lower front teeth.
An open bite can develop during childhood for several reasons. Long-term thumb sucking or pacifier use is a common factor. Tongue position, tooth eruption, and the way the jaws grow can also play a role.
In many young children, an open bite improves once a contributing habit stops. In others, the gap persists because the cause may involve jaw growth or permanent tooth position. Your child’s age, habits, dental development, and jaw relationships all shape how a dentist assesses the bite.
If the gap lingers or seems to be changing, a pediatric dentist in Spring, TX, can help you understand what you’re seeing. At Growing Great Grins, Dr. Leslie Blackburn helps families sort out which bite changes need monitoring and which need a closer look.
An open bite is a bite pattern in which certain upper and lower teeth don’t make vertical contact when the jaws close normally. An anterior open bite affects the front teeth. Dentists classify it as a type of malocclusion, meaning the teeth and jaws don’t fit together in the expected way.
Not every visible space between the upper and lower teeth is an open bite. Gaps between neighboring baby teeth are side-to-side spacing, and they often give permanent teeth extra room. An open bite describes missing contact between the top and bottom teeth.
In a typical bite, the upper front teeth sit slightly over the lower front teeth. With an anterior open bite, a vertical opening appears between them instead. The back teeth may touch while the front teeth stay apart.
Parents often spot it when their child smiles, bites into food, or closes their teeth for a photo. Some gaps are barely visible. Others are wide enough that the tongue shows through. The appearance depends on severity and on which teeth have come in.
The difference comes down to where the teeth fail to meet. An anterior open bite involves the front teeth. A posterior open bite involves the back teeth, usually the molars, while the front teeth still touch.
The location of the missing contact matters. It can affect how a child bites and chews, and it can influence how a dentist plans the next steps. This article focuses on anterior open bites, which parents notice more easily because they show when a child smiles.
These three terms describe different relationships between the upper and lower front teeth.
| Bite Term | What It Describes | What Parents May Notice |
|---|---|---|
| Open Bite | Missing vertical contact between upper and lower teeth | A gap between the front teeth while the back teeth touch |
| Overjet | Horizontal distance between upper and lower front teeth | Upper front teeth that sit forward or stick out |
| Overbite | Vertical overlap of the upper front teeth over the lower front teeth | Upper teeth covering part of the lower teeth, sometimes more than expected |
A child can have an open bite and increased overjet at the same time, especially with a long-term thumb habit. If your child’s upper front teeth also stick out, our guide on overjet in children explains how that bite problem differs from an open bite.
Open bites in children usually come from a mix of behavioral, dental, and skeletal factors. Behavioral factors include sucking habits and tongue patterns. Dental factors involve tooth position and eruption. Skeletal factors relate to how the jaws and face grow.
These factors often overlap. A photo can show that a gap exists, but it can’t show why. A pediatric dentist needs to examine the teeth, jaws, and habits together to understand the cause.
Sucking on a thumb, finger, or pacifier is called non-nutritive sucking. It’s a normal way for babies and toddlers to self-soothe. When the habit continues as the jaws develop, steady pressure can tip the upper front teeth forward and the lower front teeth back. Over time, that can leave a gap where the teeth should overlap.
Not every child with a thumb or pacifier habit develops an open bite. How often, how long, and how hard a child sucks all matter. A toddler who uses a pacifier briefly at bedtime faces less risk than a 5-year-old who sucks their thumb all day.
Stopping a contributing habit early may improve the outlook, because young teeth and bones are still adapting. Our earlier article explains how persistent thumb sucking can affect jaw development.
Tongue thrust happens when the tongue pushes forward against or between the front teeth during swallowing or speech. Babies swallow this way naturally. Most children shift to a more mature swallowing pattern as they grow, with the tongue resting against the roof of the mouth.
Tongue position and open bites are closely linked, but cause and effect aren’t always clear. A forward tongue posture between swallows may help keep an open bite from closing. At the same time, an existing gap gives the tongue an easy place to rest, so the open bite itself can change how the tongue functions.
A coordinated evaluation may help when a child also has speech concerns, swallowing difficulties, or a gap that persists after habits stop. In these cases, a pediatric dentist may work with a speech-language pathologist or an orthodontist. Tongue exercises alone are not a reliable way to correct a dental or skeletal open bite.
Some open bites have little to do with habits. Dentists separate open bites into two broad types: dental and skeletal. A dental open bite mainly involves tooth position. A skeletal open bite reflects how the jaws and face grow.
In a skeletal open bite, the child may have more vertical facial growth than average. The jaws may also angle apart in a way that keeps the front teeth from meeting. Because the cause involves the underlying jaw relationship, a persistent or complex case often calls for a detailed orthodontic assessment.
Learning how children’s jaw growth changes with age can help you see why timing matters in these cases.
Mixed dentition is the stage when a child has both baby and permanent teeth, usually starting around age 6. During this stage, the bite can look uneven for a while. A permanent incisor that’s still coming in may not reach the opposing tooth yet, which can resemble an open bite.
Dentists judge these temporary gaps in context. They look at whether the teeth are still erupting or whether the gap remains after they’ve fully come in. Eruption explains some gaps, but it doesn’t explain every open bite.
Many children with a mild open bite have few or no symptoms. Others have trouble with biting, chewing, or certain speech sounds. The effects depend on the size of the gap and on the child’s habits and development.
Front teeth work like scissors for slicing through food. When they don’t meet, biting into a sandwich, an apple, or a slice of pizza gets harder. Some children tear food with their side teeth instead, since those teeth still meet. Others break food into small pieces with their hands first.
Trouble biting food doesn’t automatically mean a child has an open bite. Loose baby teeth, sensitivity, or simple preference can cause similar behavior. It’s still worth mentioning at your child’s next visit.
Some speech sounds rely on careful placement of the tongue against or behind the front teeth. Sounds like “s,” “z,” “t,” and “d” are common examples. With an open bite, the tongue may slip forward through the gap and create a lisp-like sound.
An open bite doesn’t necessarily cause a speech disorder, and some children with one speak clearly. If speech concerns continue, ask your pediatrician or dentist whether a speech-language pathologist should evaluate your child. SLPs assess speech sounds and orofacial myofunctional disorders, including tongue thrust patterns.
When the front teeth don’t touch, children sometimes adjust how they move their jaw to chew. They may rely more on the back teeth or chew with a slightly different motion. These adaptations are usually subtle.
This is different from unilateral chewing, where a child consistently favors one side of the mouth. Unilateral chewing has its own set of possible causes. We cover changes in chewing patterns that may indicate a bite problem in a separate guide.
Sometimes. Some habit-related open bites in baby teeth improve after the habit stops, especially in younger children. Others persist because of jaw growth, tooth position, an ongoing habit, or other factors. No one can promise that an open bite will close on its own, which is why monitoring matters.
Between ages 2 and 5, the baby teeth (primary dentition) finish coming in while the jaws continue to grow. Many children this age still use a pacifier or suck their thumb, so an open bite in a toddler or preschooler is often linked to a habit.
Your dentist will usually ask about habits first. If a habit is present, the recommendation may be habit guidance and monitoring, since many habit-related gaps improve once the habit stops. An open bite noticed at one visit doesn’t mean your child needs treatment right away. The goal is to watch how the bite changes over time.
This window marks the start of mixed dentition, when permanent front teeth begin replacing baby teeth. It’s a useful time to look closely at a persistent open bite, because the dentist can see how the new incisors settle.
The American Association of Orthodontists recommends that children have their first orthodontic check-up by age 7. That check-up is an assessment. Many children leave with a plan to keep watching rather than a treatment start.
Certain findings make it less likely that an open bite will close without help:
There’s no single age when spontaneous improvement stops. Each child’s growth and habits create a different picture.
A small gap in a young child with an active habit can usually wait for the next routine checkup. Schedule a visit sooner if the open bite persists after the habit stops, seems to be getting worse, or affects eating or speech. These signs deserve a closer look.
Consider scheduling a pediatric dental evaluation if you notice any of these:
No. Not every child with an open bite needs braces. Management depends on your child’s age, the cause of the gap, its severity, any effects on function, and the stage of dental development. Some children need only habit guidance and monitoring. Others may benefit from orthodontic care at the right time.
A pediatric dentist may suggest an orthodontic referral when an open bite persists after habits stop. Significant functional problems or signs of a skeletal discrepancy can also lead to a referral. Other findings, such as crowding or a crossbite alongside the open bite, may make specialist input helpful.
A referral is an assessment step. It gives you an orthodontist’s opinion on whether treatment would help and when. It does not commit your child to braces.
A bite evaluation usually starts with a conversation, moves to a hands-on exam, and adds imaging only if needed. Here’s what that looks like from a parent’s side of the chair.
Your dentist will likely ask about:
Your answers help the dentist judge whether the open bite looks habit-related, eruption-related, or connected to growth.
Next, the dentist looks at how the teeth meet. That includes front-tooth contact, how the back teeth fit together, and the shape of the dental arches. They’ll also watch how your child’s jaw opens, closes, and moves side to side.
Facial and dental symmetry are part of the exam too. The dentist notes which teeth are baby teeth and which are permanent, since that affects what changes to expect.
Not every child with an open bite needs X-rays or advanced imaging. The dentist chooses radiographs, photos, digital scans, or orthodontic records based on clinical need. These tools help when the dentist needs to see developing teeth below the gums or measure jaw relationships more precisely.
Treatment for an open bite depends on the cause, your child’s age, and how the bite is developing. The approaches below are an educational overview of what clinicians may consider. Your child’s dentist or orthodontist will recommend what fits your child.
For many younger children, the first step is helping them stop a sucking habit. The dentist then tracks the bite at later visits to see whether the gap starts to close. Supportive, non-punitive strategies can make the change easier. A few examples:
Pressure and shame can make habits harder to break. Letting your child help choose rewards or reminders can keep the process positive.
In selected cases, an orthodontist may recommend an appliance as part of early, or interceptive, treatment. Some appliances help discourage a habit. Others may help guide tooth position or jaw growth. The right choice depends on the cause and the child’s stage of development, so no single appliance fits every open bite.
When an open bite continues into the permanent teeth, orthodontic treatment may improve tooth position and how the bite comes together. Braces or aligners can be part of that plan. Skeletal open bites may need more complex planning across several stages of growth. Results vary, and an orthodontist can explain what’s realistic for your child.
Some children benefit from more than one specialist. A pediatric dentist, orthodontist, and speech-language pathologist may work together when speech, swallowing, or tongue function is involved. A pediatrician or ENT may also help if breathing concerns are present.
Families in Spring and The Woodlands don’t have to figure out an open bite alone. A pediatric dentist who sees your child regularly can track how the bite develops and catch changes early. At Growing Great Grins in Spring, TX, Dr. Leslie Blackburn and her team care for children from infancy through the teen years.
One visit gives a snapshot. Several visits show a trend.
By comparing findings over time, a dentist can tell whether an open bite is improving, staying stable, or progressing. That trend often matters more than how the gap looks on a single day. It’s one reason routine pediatric dental exams are valuable for children with a developing bite.
Every child’s bite develops differently, so recommendations should be individual. Some children need only monitoring and habit support. Others may benefit from an orthodontic opinion.
When a referral makes sense, your child’s dentist can explain why and what the specialist will look for. Parents can bring questions to any visit, whether they’re about habits, speech, or how the teeth meet.
It can be common, especially in toddlers who still use a pacifier or suck their thumb. The bite is still developing at this age, and some habit-related gaps improve once the habit stops. Not every open bite at age 3 is harmless, though. If the gap is large, your child struggles to bite food, or no habit explains it, ask your pediatric dentist to take a look.
Yes, persistent thumb sucking can contribute to an open bite. The risk depends on how often, how long, and how intensely a child sucks. Occasional thumb sucking in a young toddler is less likely to affect the bite. Frequent, forceful sucking that continues into the preschool years carries more risk. Tongue position and jaw growth can also play a role.
It may. Some open bites in young children improve after pacifier use stops, especially when the habit ends early and the gap involves tooth position. Improvement isn’t guaranteed. If jaw growth or tongue posture is involved, or the habit lasted a long time, the gap may persist. Your dentist can monitor the bite and tell you if an orthodontic opinion would help.
An open bite can affect certain sounds, such as “s” and “z,” because the tongue may push forward through the gap. Some children with an open bite speak clearly, though, and it doesn’t necessarily cause a speech disorder. If you have concerns, a speech-language pathologist can assess your child’s speech and tongue function. Your dentist can help coordinate care if both bite and speech are involved.
Mention an open bite to your pediatric dentist as soon as you notice it. There’s no need to wait for a certain birthday. The American Association of Orthodontists also recommends an orthodontic check-up by age 7. That early orthodontic screening helps identify bite problems, but it doesn’t mean your child will need treatment at that age.
It can. Bite relationships keep changing as baby teeth fall out and permanent teeth come in. Sometimes an eruption-related gap closes as the new teeth settle. In other cases, an open bite becomes more noticeable, especially if a habit continues or jaw growth plays a role. Regular dental visits during the mixed dentition years help catch these changes early.
Have you noticed that your child’s front teeth don’t meet when they bite down? A pediatric dental evaluation can show whether the bite is developing normally or needs closer monitoring. Some children simply need time, habit support, and regular check-ins.
Growing Great Grins helps families in Spring, TX, and the surrounding Woodlands area understand their children’s dental development in a calm, welcoming setting. You can contact the office to schedule an appointment with Dr. Leslie Blackburn.
