Clear aligner treatment is a modern orthodontic approach that straightens teeth using a series of nearly invisible, removable trays. It is designed to improve tooth alignment and bite in a discreet way, while allowing you to eat, brush, and floss without the restrictions that come with fixed braces. Treatment is planned in detail and progresses gradually, with regular reviews to keep movement on track.

What clear aligner treatment is designed to do

Clear aligners apply gentle, controlled pressure to move teeth into a healthier, more balanced position over time. Depending on your starting point and goals, treatment may aim to:

• straighten crowded or rotated teeth
• close gaps
• improve the way the upper and lower teeth meet (bite)
• support easier cleaning and long-term gum health

Aligners are custom-made for your teeth and are changed in a planned sequence so that each set makes small adjustments.

When this option may be suitable (and when it may not be)

Clear aligners can be a good choice for many adults and teenagers who want a discreet orthodontic option. They are commonly used for mild to moderate:

• crowding
• spacing
• overbite or underbite
• crossbite
• open bite

However, not every case can be treated predictably with aligners alone. More complex tooth movements, significant jaw discrepancies, or cases needing major bite correction may be better suited to fixed braces, a combined approach, or treatment led by a specialist orthodontist. During assessment, we will explain what is realistically achievable and whether any alternative options should be considered.

Your assessment and treatment planning

A careful assessment is essential because clear aligners are highly customised. Planning typically includes:

• a discussion about what you would like to change and what matters most to you (appearance, function, timelines)
• an oral health check to ensure teeth and gums are healthy before orthodontic movement begins
• digital scans and photographs, and sometimes X-rays, to assess tooth position, roots, and bite

Using these records, a digital treatment plan is created to map the expected tooth movements. This helps estimate the number of aligners required, the likely duration, and whether additional techniques may be needed to achieve the planned result.

Preparing your mouth for aligners

Orthodontic treatment works best when the mouth is healthy. If there is tooth decay, gum disease, or unresolved inflammation, this is usually treated first. In some cases, teeth may need minor reshaping between them (interproximal reduction) to create space safely, or attachments may be planned to improve the grip and precision of certain movements.

How treatment is carried out

Clear aligner treatment is delivered in stages.

1) Digital scan and aligner design

A 3D scan is taken and used to design a sequence of aligners. The plan shows the intended progression of tooth movement, from the starting position to the expected outcome.

2) Fitting and getting started

When your aligners are ready, they are checked for fit and comfort. If attachments are part of the plan, these small tooth-coloured shapes are bonded to specific teeth to help guide movement. You will be shown how to insert and remove aligners, how to clean them, and how to manage day-to-day wear.

3) Wearing aligners day to day

Aligners are typically worn 20 to 22 hours per day. They are removed for eating and drinking anything other than water, and for brushing and flossing. Each set is usually worn for around 1 to 2 weeks, depending on the plan.

Consistency is a major factor in success. If aligners are not worn as prescribed, teeth may not track as planned and treatment may take longer or require refinements.

4) Progress reviews and refinements

Regular reviews are scheduled to check that teeth are moving as expected, that aligners fit properly, and that your bite is developing safely. If progress is not matching the plan, adjustments can be made. Some people need a refinement phase at the end, which involves additional scans and a further short series of aligners to fine-tune the result.

What it feels like and what to expect

Most people adapt quickly, but it is normal to notice:

• pressure or mild tenderness when starting a new aligner, especially for the first 1 to 3 days
• a temporary change in speech while you get used to the trays
• increased saliva or a dry mouth initially

Over-the-counter pain relief may help if needed, provided it is safe for you. Sharp pain, persistent discomfort, or aligners that do not seat fully should be checked.

Looking after your teeth and aligners during treatment

Good oral hygiene is particularly important during orthodontic treatment.

• Brush and floss after meals before putting aligners back in.
• Clean aligners daily using a soft toothbrush and lukewarm water. Hot water can warp the plastic.
• Avoid sugary or acidic drinks while aligners are in place, as liquid can be trapped against teeth.
• Store aligners in their case when not being worn to reduce loss or damage.

If you grind your teeth, have a history of gum disease, or are prone to cavities, extra preventive measures may be recommended.

How long treatment takes

Treatment length varies with the complexity of tooth movement and how consistently aligners are worn. Many people complete treatment in around 6 to 18 months, although shorter or longer plans are possible. At your consultation, you will be given a personalised estimate based on your scan and bite assessment.

After treatment: retainers and long-term stability

Teeth have a natural tendency to drift back towards their original position. Retention is therefore a key part of orthodontic care.

Once active treatment ends, retainers are provided to help maintain your result. Retainers may be removable, fixed behind the teeth, or a combination of both. Wearing retainers as advised is essential for long-term stability.

Risks, limitations, and important considerations

Clear aligner treatment is safe and widely used, but all orthodontic treatment carries potential risks and limitations. These are discussed during your consultation and may include:

• temporary discomfort or sensitivity
• irritation to lips or cheeks (less common than with fixed braces, but possible)
• increased risk of tooth decay or gum problems if oral hygiene is poor
• small changes to the bite during treatment that need monitoring and adjustment
• tooth movement not tracking as planned, requiring refinements or additional attachments
• relapse if retainers are not worn as instructed

Less common risks include root resorption (shortening of tooth roots) and gum recession, particularly in people with thin gum tissue or pre-existing gum issues. For some patients, aligners may not be the most predictable option for certain movements, and alternatives may be recommended.

Your consultation and ongoing support at our orthodontic clinic

Your care is coordinated through our specialist dental clinic, with a clear plan from assessment through to retention. The process typically includes:

• a detailed consultation to understand your goals and assess suitability
• digital scanning and a personalised treatment plan
• clear guidance on wear time, hygiene, and what to do if an aligner is lost or damaged
• scheduled reviews to monitor progress and protect your bite and oral health
• a structured retention plan and follow-up support once treatment is complete

If you are considering clear aligners, the most helpful next step is a consultation where your teeth and bite can be assessed properly. This allows a realistic discussion of expected outcomes, timelines, and whether aligners are the best option for your individual case.