How long do clear aligners take to straighten teeth?

How long does clear aligner treatment take?

The honest answer is that it depends on how far your teeth have to travel. Average treatment runs to about six months. Simple movement, closing a small space or tidying two rotated front teeth, can finish in around eight weeks. Genuine crowding, a deep bite, a crossbite or a large overjet can take a year or more. You will usually notice something changing in the first week, which is oddly motivating.

Timing starts before the aligners do. From consultation to fitting your first aligner is typically three weeks, which covers the scan, the digital plan and the manufacture of your trays. If there is decay to treat or gum inflammation to settle first, that adds time, and it is not optional. Moving teeth through unhealthy gums is a poor idea, and it is one reason every plan begins with a full assessment.

Why wear time decides your timeline

Aligners are worn twenty two hours a day and taken out only to eat, to drink anything other than water, and to clean your teeth. Each tray is worn for about a week before you move to the next, and each one is designed to move specific teeth by a fraction of a millimetre. The plan assumes the wear. Take them out for an hour here and an evening there, and the teeth quietly fall behind schedule.

When that happens the aligners stop fitting properly, usually showing as a small gap at the biting edge, and everything after it in the series fits worse still. The fix is more aligners and more months. Patients who are strict for six months finish in six months. There is no way around this and no device that compensates for it, which is the one thing I want anybody considering treatment to understand first.

What are attachments and do you need them?

Attachments are small tooth coloured bumps of composite bonded to certain teeth at your fitting visit. They give the plastic something to push against, so a tooth can be rotated, uprighted or pulled down rather than simply tipped. They are placed without injections and without drilling, they are shaped from a template made with your plan, and they are polished off completely at the end, leaving the tooth exactly as it was.

Not every case needs them, and almost every good case does. Some plans also call for a small amount of space creation between teeth, measured in tenths of a millimetre, to let crowded teeth line up properly. Both of these are shown to you on the digital plan before you agree to anything, so there are no surprises waiting for you at the fitting appointment.

How often will you need to come in?

Far less often than with fixed braces, which usually need adjusting every four to six weeks. With remote monitoring you scan your own teeth at home using your phone in a small scanning box and upload the images, and I check the fit and the progress between appointments. For most people that reduces review visits to roughly one or two across the whole of their treatment.

The benefit is not only convenience. Remote monitoring catches a tray that is not seating properly in week nine rather than week sixteen, which is exactly the kind of early correction that keeps a case on schedule. Longer or more complex plans need more reviews in person, and some people simply prefer coming in, which is entirely fine. There is more detail on our clear aligners page.

What are refinements, and are they normal?

Refinements are a second short series of aligners, made near the end of treatment to finish the detail. Teeth are biological rather than mechanical, and some of them move slightly differently from the computer prediction. A refinement scan picks up the difference and a handful of extra trays closes it. Needing refinements is not a failure of planning. On many cases it is anticipated from the very beginning.

Expect refinements to add anything from a few weeks to a few months. The important thing is that you reach the result you agreed to, rather than stopping at whatever the final tray happened to achieve. Clear aligners at LUSSO are from £2,500 for a single arch and from £5,000 for both arches, and what is included is set out in writing before you begin.

Why retainers are for life

Teeth do not set like concrete when the last aligner comes out. The fibres around each root have a memory, and the whole face keeps changing slowly throughout life. Without retention, teeth drift back, and the lower front teeth are the worst offenders of all. This is true of every method of straightening ever invented, from wires to aligners, and it is the commonest reason people end up in treatment twice.

My guidance is straightforward. Wear your removable retainer for twenty two hours a day for the first six months after your final aligner, then at night from then on, indefinitely. In some cases a thin fixed wire is bonded behind the front teeth as well as the removable retainer. Retainers wear out, get sat on and get lost, so plan on replacing them periodically and keep the old one until the new one fits.

What about the edges of your teeth afterwards?

Straightening lines teeth up, but it does not restore what has already been worn away. Once the teeth are in position, uneven edges, small chips and length differences that were hidden by the crowding become visible, because there is now a clean line to judge them against. This catches people out at the end of treatment, so I much prefer to point it out at the beginning.

The finish is usually very small. A little edge bonding, adding composite to the biting edges of four to six teeth, evens the line and makes the whole result read as deliberate. Some people add whitening at the same stage, since trays are already part of the routine. Neither is compulsory. Both are an appointment rather than a project.

In short

Straightening teeth is mostly patience, and the patients who finish on time are simply the ones who wear their aligners. If you are curious about what is possible for your smile, a Dental Wellness Assessment and a digital plan will show you the likely timeline before you commit to anything at all.