Single arch Invisalign cost: treating the top or bottom teeth only

The honest answer to a single arch Invisalign cost question is that a one-arch case is not priced as a separate product. At Dental & Wellness London every Invisalign case sits on one of three plans: Invisalign Express £2,200, Invisalign Moderate £3,400 or Invisalign Unlimited £4,500–£4,900. Treating only the top or bottom teeth usually places a case on Express or Moderate, and the exact plan is confirmed after your free consultation, iTero scan and ClinCheck preview.

This page explains when one arch is genuinely enough, when it is not, how a one-arch case moves through treatment, and what you pay. For the full price picture across every plan, see our guide to Invisalign cost UK; for how aligners work in general, see our main Invisalign page.

What single-arch Invisalign is, and how it works

Single-arch treatment means aligners are made for only one jaw: the upper teeth or the lower teeth. The other arch is left as it is. The aligners themselves are the same as in any Invisalign case. Each set is worn for 20 to 22 hours a day and changed on a schedule, and each one moves selected teeth a fraction of a millimetre towards the position planned on your ClinCheck.

Because only one arch is moving, the plan usually involves fewer aligners and fewer attachments (the small tooth-coloured bumps that help aligners grip). That is the main reason one arch Invisalign often sits on a lower plan. It is not a lighter version of the treatment; it is the same treatment applied to less of the mouth.

Single arch Invisalign cost: where one-arch cases sit on our plans

We do not publish a separate single-arch price list, and we do not invent one. A case is placed on a plan by how much movement it needs, not by how many arches are involved. In practice, the pattern looks like this:

• Invisalign Express, £2,200. Small corrections to one arch: a slightly crowded lower front, a single tooth that has drifted, a small gap, or mild relapse after braces many years ago. This is where most top or bottom teeth only cases sit.
• Invisalign Moderate, £3,400. One arch with more to do: moderate crowding, several rotated teeth, or spacing that needs more aligners to close predictably.
• Invisalign Unlimited, £4,500–£4,900. Rarely needed for a single arch. Our Invisalign Unlimited plan page explains what it covers. Where a case needs this level of movement, it usually involves the bite, and then both arches are treated together.

Your consultation is free and includes an iTero scan and ClinCheck preview. After it, you receive the plan, timeline and fee in writing to take home. Retainers are quoted in writing alongside the treatment plan. If you want to compare a one-arch plan with treating both, our page on full Invisalign cost for both arches explains where those cases fall.

Who single-arch treatment suits

One arch is a sensible plan when the concern is genuinely confined to one jaw and the bite is already sound. Typical examples include:

• Mild crowded teeth in the lower front, with a well-aligned upper arch.
• A small space between upper front teeth, where the lower arch is stable. Our page on gappy teeth covers the wider options.
• Relapse in one arch after earlier orthodontic treatment, often because retainers were stopped.
• Preparing one arch for later restorative work, such as straightening a tooth before a crown or bonding, so less tooth needs to be shaped.

Who it does not suit

Single-arch treatment is not the right plan when the problem involves how the teeth meet. An overbite, underbite, crossbite or open bite is a relationship between the two arches, so moving only one arch rarely corrects it and can leave the teeth meeting awkwardly. Our article on overbite treatment explains why bite cases are planned across both arches.

It may also be unsuitable when gum disease is active or decay needs treating first, when crowding is severe enough to need space created in both arches, or when the cause is skeletal. Complex skeletal cases are referred to a specialist orthodontist. If one arch looks fine from the front but the scan shows the bite would be affected, we will say so rather than under-treat a case to reach a lower plan.

Options compared: one arch, both arches, or something else

• Single-arch Invisalign. Fewer aligners, usually Express or Moderate, suited to isolated concerns in one jaw.
• Both arches with Invisalign. Needed when the bite is involved or both arches are crowded; usually Moderate or Unlimited.
• Fixed braces or cosmetic fixed braces. Sometimes preferred for particular movements. These are quoted in writing after assessment. Our comparison of Invisalign vs braces sets out the trade-offs.
• Composite bonding without straightening. For very minor irregularity, reshaping a tooth edge can be enough. Our page on composite bonding explains when this is reasonable and when alignment first is kinder to the teeth.

For a broader view of all the ways we straighten teeth, see our teeth straightening hub, which also covers clear aligners more generally.

The process, step by step

1. Free discovery call (optional). A 20-minute phone conversation about what you would like to change.
2. Free Invisalign consultation. An examination of both arches and your bite, an iTero scan, and an honest view of whether one arch is enough.
3. ClinCheck and written plan. You see the planned movement for the arch being treated, and you receive the plan, timeline and fee in writing.
4. Fit appointment. Any attachments are placed and your first aligners fitted. Where enamel shaping (IPR) is planned, it is done at this stage or at an early review.
5. Reviews. Short visits every six to eight weeks to check each tooth is tracking.
6. Refinement, if needed. A short additional series of aligners to fine-tune the finish, as set out in your plan.
7. Retainers. Fitted at the end of active treatment to hold the result.

Results, longevity and aftercare

Simple one-arch cases often finish within a few months; cases on Moderate take longer. Our guide to how long Invisalign takes by case gives realistic ranges. Results vary with the case and with how consistently the aligners are worn.

The result lasts as long as retention is maintained. Teeth that have moved, particularly lower front teeth, tend to drift back without a retainer. Most patients wear a removable retainer at night long term, and some have a thin fixed retainer bonded behind the front teeth. Our article on retainers after Invisalign covers the options. Regular hygiene visits during treatment protect the gums while aligners are worn most of the day.

Risks, and how we reduce them

• Treating one arch when the bite needed both. Reduced by scanning and assessing both arches at consultation, not just the one you are concerned about.
• Teeth not tracking as planned. Reduced by careful case selection, regular reviews and refinements where needed.
• Decay and gum inflammation. Reduced by an examination before treatment and good cleaning habits during it.
• Root shortening or gum recession. Uncommon with the light forces aligners use; gums are assessed before treatment and X-rays taken where indicated.
• Relapse. Managed with retainers worn as instructed.

Cost in Islington and London: what to compare

When you compare one arch Invisalign quotes in London, compare what each fee includes as well as the figure. Ask whether the consultation and scan are included, how many reviews and refinements are covered, whether IPR is included where needed, and what retainers cost. At our practice the consultation is free, and your written plan sets out what the fee covers, with retainers quoted alongside it. We offer 0% APR finance over 12 months via Tabeo, subject to status, on any of the three plans.

Why choose us

Every Invisalign case at our practice is planned and delivered by Dr Vishal Patel: BDS Liverpool, MSc Aesthetic & Restorative Dentistry (Manchester), GDC 103127 and AACD member. He is an Invisalign Diamond II provider, in the top 1% of UK Invisalign providers, and has treated over 15,000 cases across around 20 years in dentistry. Deciding whether one arch is enough is a planning judgement, and that judgement is where experience matters most.

Because his training is restorative as well as aesthetic, a one-arch plan is checked against the bite, tooth wear and any future cosmetic work, so that straightening one arch does not create a problem in the other.

Single-arch Invisalign questions

Can you get Invisalign on just the top or bottom teeth?

Yes, where the concern is confined to one arch and the bite is already sound. Mild lower crowding, a small upper gap or relapse in one arch are common examples. We assess both arches and your bite at the free consultation, because a case that looks like one arch from the front sometimes needs both to finish well.

Is single-arch Invisalign cheaper?

Often, because fewer aligners are needed, so most one-arch cases sit on Invisalign Express at £2,200 or Moderate at £3,400 rather than Unlimited. It is cheaper because less movement is needed, not because it is a lesser treatment. Your plan and fee are confirmed in writing after the free consultation.

How long does one arch Invisalign take?

Simple single-arch cases on Express often finish within a few months; cases on Moderate usually take longer. The timeline depends on how far the teeth need to move and how consistently the aligners are worn. Your ClinCheck shows the planned number of aligners, and the written plan gives an expected timeframe.

Will treating one arch affect my bite?

It can, which is why we check. Moving the teeth in one arch changes how they meet the opposite arch. On a well-chosen case the change is small and planned for. Where the scan suggests the bite would be thrown off, we recommend treating both arches instead.

Do I need a retainer if only one arch is treated?

Yes. The arch that has moved needs retention to stay where it was placed, usually a removable retainer worn at night and sometimes a fixed retainer behind the front teeth. Retainers are quoted in writing with your treatment plan, so the full cost is clear before you start.

Getting here

Our practice is at 222 Essex Road, Islington, London N1 3AP, two minutes' walk from Essex Road station. Highbury & Islington is one stop away by train, buses 38, 56, 73, 341 and 476 stop on Essex Road, and Angel is a 15–20 minute walk; our patients from Angel page has more. Many patients cycle or use Lime and Forest e-bikes; Dalston is about ten minutes away by bike. Local details are on our Invisalign in Islington page. We are open Monday to Friday, 8am to 7pm, by appointment.