Crowding, spacing and bite differences can affect appearance, function and long-term dental care. The name of a problem is only a starting point; an orthodontic examination shows how the teeth and jaws work together.
Crowding and spacing
Crowding occurs when the available arch space does not accommodate the teeth in healthy positions. Teeth may overlap, rotate or remain blocked from eruption. Besides appearance, crowded areas can be more difficult to clean. Treatment may create or redistribute space with braces, aligners, expansion, selective tooth reduction or, in some cases, extraction.
Spacing may come from tooth-size differences, missing teeth, habits or the position of the teeth and jaws. Closing every gap is not automatically the right goal; sometimes space should be maintained for restorative dentistry. Braces and Invisalign can both address many spacing concerns when the overall bite is considered.
Overbite, underbite and open bite
Overbite describes excessive vertical overlap of the front teeth, while overjet describes how far the upper front teeth project horizontally. An underbite occurs when lower teeth or the lower jaw sit ahead of the upper. An open bite leaves teeth unable to meet in a particular area when the mouth closes.
These relationships may involve tooth position, jaw growth or both. Treatment can include braces, aligners, elastics, growth-directed appliances or coordination with jaw surgery in selected adult cases. The recommendation depends on severity, age and the source of the discrepancy.
Crossbite and jaw shifting
A crossbite occurs when one or more upper teeth bite inside the lower teeth. It may affect front or back teeth and can be associated with an arch-width difference or a jaw shift during closure. When identified in a growing child, selected crossbites may benefit from early orthodontic treatment.
Not every crossbite receives the same appliance. The orthodontist determines whether the issue is dental or skeletal, whether growth can assist correction and how the finished upper and lower arches should fit.
Impacted, missing and unusually positioned teeth
An impacted tooth cannot erupt normally because of its position, available space or an obstruction. Canine teeth are commonly affected. Treatment may involve creating space and coordinating with an oral surgeon to guide the tooth into the arch.
Congenitally missing teeth require a coordinated decision: close the space orthodontically or preserve it for a future replacement. Existing implants and restorations also affect planning for adult orthodontic treatment. These cases benefit from communication among the orthodontist, dentist and other specialists.
When to schedule an evaluation
Seek an evaluation when you notice prominent crowding, difficulty biting, a jaw shift, protruding teeth, uneven wear, a tooth that has not erupted or movement after previous treatment. Children are commonly evaluated around age seven, while teens and adults can begin whenever a concern becomes apparent.
OSSTL evaluates patients at its Creve Coeur and Sunset Hills offices. The consultation should answer what the problem is, whether treatment is necessary, which options are appropriate and when care would be most useful.
Frequently asked questions
Can Invisalign correct bite problems?+
Invisalign can treat many bite concerns, sometimes using attachments and elastics. Some problems may be more predictable with braces or another approach.
Does crowding always require tooth extraction?+
No. Space may be managed in several ways. The decision depends on facial balance, tooth size, bite, gum support and severity.
What is the difference between overbite and overjet?+
Overbite is vertical overlap of the front teeth. Overjet is the horizontal projection of upper front teeth beyond the lower teeth.
Should a crossbite be treated early?+
Some crossbites benefit from correction during growth, but timing depends on whether the problem is dental, skeletal or causing a functional shift.