Key takeaways
Clear aligners treat mild to moderate dental corrections, including crowding, spacing, and certain bite problems.
Minor corrections involve limited tooth movement and generally require fewer aligner stages.
Complex cases require detailed treatment planning to determine whether aligners can achieve the required tooth movements.
Severe jaw discrepancies, surgical cases, and highly complex movements may require alternative orthodontic treatment.
Clear aligner treatment uses a series of customised trays that move teeth gradually according to a personalised treatment plan.
Treatment time depends on case complexity, tooth movements, and refinement requirements.
Consistent wear, scheduled tray changes, oral hygiene, and treatment compliance support treatment progress.
A professional assessment confirms whether clear aligners are suitable for the teeth, bite, and required correction.
Table of Content
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What dental corrections can clear aligners treat?

Clear aligners treat a range of mild to moderate dental alignment and bite problems.
Crowding
Crowding occurs when there is not enough space for teeth to align properly, causing slight overlapping or crookedness. Clear aligners gradually create the necessary space and guide teeth into better alignment.
Gaps in teeth
Gaps occur when there is excess space between two or more teeth. Clear aligners gradually move the teeth closer together to reduce spacing and create a more even smile.
Slight tooth rotations
A rotated tooth sits at an angle instead of following the natural curve of the dental arch. Clear aligners apply controlled pressure to gradually rotate suitable teeth into their planned position.
Spacing
Mild spacing refers to multiple small spaces across the dental arch rather than a single gap. Clear aligners can improve overall tooth positioning by distributing teeth more evenly.
Overbite
An overbite occurs when the upper front teeth slightly overlap the lower front teeth more than normal. In suitable cases, clear aligners can help improve the bite by gradually repositioning the teeth.
Underbite
An underbite occurs when the lower front teeth sit slightly ahead of the upper front teeth. Depending on the cause and severity, clear aligners may help improve the bite through controlled tooth movement.
Crossbite
A crossbite occurs when one or more upper teeth bite inside the lower teeth instead of outside them. Clear aligners can correct certain mild crossbites by gradually moving the affected teeth into proper alignment.
Cosmetic alignment
Minor cosmetic alignment focuses on correcting slightly crooked, tilted, or uneven teeth that affect the appearance of the smile. Treatment improves alignment while maintaining the planned bite relationship.
Fix your smile, from the comfort of your home
With Caspersmile Clear Aligners, you can correct mild to moderate alignment or bite issues right from your couch, for just £675.
When are clear aligners not suitable?
Clear aligners are not suitable for every orthodontic problem. Severe skeletal jaw discrepancies, cases requiring jaw surgery, and some highly complex tooth movements fall outside routine aligner treatment. Severe crowding, cases requiring extractions, and highly complex tooth movements may require fixed braces, surgical treatment, or a combination of orthodontic approaches. Examples include:
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Severe skeletal discrepancies involving the position or size of the jaws
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Cases requiring jaw surgery
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Severe crowding requiring extractions
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Complex tooth movements that require greater control than aligners provide
How long does clear aligner treatment take?
Caspersmile Clear Aligners generally fix mild to moderate dental concerns in 3 to 5 months. Whereas, in-office aligners might take up to 18 months, depending upon the case.
Minor corrections generally require fewer aligner stages, while complex corrections take longer because they involve more extensive tooth movement. Treatment duration also depends on the number of teeth being moved, the type of correction, and whether refinement aligners are required. The exact timeframe comes from the individual treatment plan.
Finally, yes to clear aligners for minor corrections, no for major ones
Clear aligners are suitable when your teeth and bite can be corrected safely and predictably through planned tooth movements. A professional assessment confirms whether clear aligners are appropriate for your specific dental correction.
This applies to both professionally supervised and at-home clear aligners, as treatment begins with a clinical assessment and personalised treatment plan.
Frequently asked questions
Citations
Website, N. (2026c, July 2). Braces. nhs.uk. https://www.nhs.uk/tests-and-treatments/braces/
Clear aligners - British Orthodontic Society (BOS). (2022, September 23). British Orthodontic
Society (BOS). https://bos.org.uk/clear-aligners/
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