A child can have a crossbite without experiencing pain or showing an obvious problem when smiling. Sometimes parents notice that an upper front tooth has grown behind a lower tooth. In other cases, the dentist discovers that the back teeth meet incorrectly during a routine examination, even though the front teeth appear well aligned.
For families considering Invisalign for children, the important question is whether the crossbite involves tooth position, jaw development, or a combination of both. Clear aligners can correct certain dental crossbites, but some children benefit from other orthodontic appliances. Understanding the underlying problem is the starting point for choosing an appropriate treatment.
Understanding the Different Types of Crossbite
A crossbite occurs when one or more upper teeth bite inside the corresponding lower teeth. An anterior crossbite affects the front teeth, while a posterior crossbite involves the back teeth. These descriptions identify where the problem occurs, but they do not explain why it developed.
A dental crossbite primarily involves the position of individual teeth. For example, an upper permanent incisor may erupt behind a lower incisor even when the jaws have an otherwise appropriate relationship. In this situation, treatment can focus on correcting the position of the affected tooth.
A skeletal crossbite involves the size or relationship of the jaws. A child with a narrow upper jaw may have several upper back teeth sitting inside the lower teeth because the upper arch is too narrow relative to the lower arch. In appropriately selected growing children, a palatal expander may be recommended to address the underlying width discrepancy.
The distinction matters because moving individual teeth does not necessarily correct a skeletal problem. During the orthodontic examination, we assess the dental arches, jaw relationships and appropriate diagnostic records to determine the source of the crossbite. This allows us to recommend Invisalign when the required correction is suitable for aligners and consider other appliances when necessary.
Why We Examine How the Jaw Closes
Some crossbites are associated with a functional jaw shift. This occurs when the teeth interfere with the child’s natural closing movement, causing the lower jaw to shift sideways to find a position where the upper and lower teeth fit together.
Consider a child whose chin appears centred while the mouth is slightly open but moves to the left when biting down. During an examination, we might observe that the lower jaw initially closes toward the centre before shifting sideways as the back teeth make contact. That movement provides information about how the bite functions that would not be apparent from examining the final tooth positions alone.
We evaluate where the teeth first make contact and whether the lower jaw changes direction during closure. These observations help distinguish a functional shift from an asymmetry that remains present independently of tooth contact. The distinction is clinically relevant because the source of the apparent jaw deviation affects how we interpret the child’s bite.
Parents may notice that their child’s chin moves toward one side when the teeth come together or that the mouth seems to close unevenly. Sharing those observations during a consultation can be helpful, particularly if the movement has become more noticeable over time. A clinical examination is still necessary to determine what is happening and whether orthodontic intervention is appropriate.
How Invisalign Moves Teeth Out of Crossbite
When Invisalign is suitable for a dental crossbite, treatment involves planning a sequence of movements that guides the affected teeth toward their intended positions. The challenge is often determining how those movements can occur within the available space and without unwanted interference from opposing teeth.
Imagine a child whose upper lateral incisor sits behind the lower front teeth. If neighbouring teeth occupy the space needed for correction, the orthodontic plan may first need to create sufficient room. Moving the incisor before that space is available could compromise the intended alignment or make the movement less predictable.
The tooth’s orientation also influences treatment planning. A tooth that is significantly rotated or tilted may require a different movement sequence from one that simply needs a small positional adjustment. Depending on the case, attachments or other orthodontic techniques may be used to improve control during selected movements.
Another consideration is whether the opposing teeth obstruct the correction. As the affected upper tooth moves toward its intended position, its contact with the lower teeth may need to be managed as part of the treatment. We evaluate these relationships when designing the aligner sequence rather than assuming that the tooth can move directly into place.
What Determines Whether Treatment Should Start Now?
Finding a crossbite does not automatically mean that orthodontic treatment must begin immediately. In children, the decision also involves evaluating the condition of the teeth and supporting tissues, along with changes expected during dental development.
Several clinical findings can influence treatment timing:
- Unusual tooth wear: A reversed bite may concentrate contact on tooth surfaces that would not normally experience the same forces. We examine whether this relationship is contributing to wear and whether correcting it could help prevent further damage.
- Gum recession or localized pressure: Certain anterior crossbites may place unwanted pressure on the supporting tissues around the lower front teeth. If changes are present, we assess their possible relationship to the bite and whether additional dental care is required.
- Permanent teeth that have not erupted: A child may still have developing teeth beneath the gums. Their position and expected eruption can affect the timing of orthodontic treatment, particularly when nearby teeth are still changing.
- Dental trauma or previous restorations: An affected tooth may have a history of injury or restorative treatment that requires special consideration. We assess its condition before deciding when orthodontic movement should begin.
- Other active dental problems: Tooth decay, significant gum inflammation or other untreated concerns may need to be addressed before aligner treatment. This helps establish appropriate conditions for moving the teeth safely.
If there is no immediate clinical reason to intervene, monitoring may be the better choice. Scheduled orthodontic evaluations allow us to observe the child’s development and reassess the need for treatment as the dentition changes. This approach avoids starting an unnecessary phase of treatment while preserving the opportunity to act when appropriate.
What Happens After the Crossbite Is Corrected?
Correcting the reversed relationship is an important milestone, but it is not always the final stage of orthodontic care. Once the affected teeth reach their intended positions, we evaluate whether the corrected bite is stable and whether additional adjustments are needed for the teeth to fit together properly.
For a child treated during mixed dentition, future dental development is an important consideration. As remaining permanent teeth erupt, the alignment and bite relationships may change. A successful early correction does not necessarily eliminate the possibility of another phase of orthodontic treatment during adolescence.
Retention may also be recommended, depending on the movements performed and the child’s stage of development. The type and duration of retention are individualized because teeth can have a tendency to move after active orthodontic treatment. We discuss the appropriate follow-up plan with families so they understand what to expect after the initial correction.
Invisalign for Children in Port Coquitlam at Innova Orthodontics
If you have noticed that your child’s upper and lower teeth do not meet properly, an orthodontic consultation can help clarify whether a crossbite is present and what treatment options are available. At Innova Orthodontics in Port Coquitlam, our certified orthodontic specialists evaluate each child’s bite and dental development before recommending Invisalign or another orthodontic approach. Contact our team by clicking here to schedule a consultation and find out what treatment may be appropriate for your child. If you prefer, you can also call us on (604) 474-1141.
