What IOTN score does my child need for NHS braces?

The IOTN is one of the most important numbers in your child’s orthodontic journey, yet it’s rarely explained. Below, we walk through what it means, how the grades work, and — most importantly — what your options are if your child is borderline or falls just below the NHS threshold. Our aim is simple: to help you understand where your child stands, without the jargon, so you can make a calm, informed decision.

What is the IOTN?

The IOTN (Index of Orthodontic Treatment Need) is the national scoring system used across England to measure how much someone needs orthodontic treatment on clinical grounds. It gives every case a consistent grade so that NHS funding is directed towards the children who need treatment most. Put simply, it’s the ruler the NHS uses to decide whether your child qualifies for braces.

How is the IOTN score worked out?

An assessment looks at two separate things — the health of the bite and the appearance of the teeth — and brings them together.

1. The Dental Health Component (DHC)

This grades the bite from 1 to 5 based on clinical factors such as crowding, protruding teeth, deep or open bites, crossbites and impacted or missing teeth.

• Grade 1 — almost perfect; no need for treatment
• Grade 2 — minor irregularities; little need
• Grade 3 — moderate; a “borderline” need (this is the one to understand)
• Grade 4 — great need for treatment
• Grade 5 — very great need, often involving impacted or missing teeth

2. The Aesthetic Component (AC)

This rates how the teeth look against a scale of ten standard photographs, from 1 (most attractive) to 10 (least attractive). It only becomes decisive for borderline cases.

What IOTN grade qualifies for NHS braces?

On the NHS in England, eligibility usually works like this:

• DHC grade 4 or 5 — normally qualifies for NHS treatment on clinical need alone.
• DHC grade 3 — only qualifies if the Aesthetic Component is also 6 or above. A grade 3 with a lower aesthetic score typically does not.
• DHC grade 1 or 2 — does not qualify for NHS-funded treatment.

This is why two children whose teeth look similar to a parent can receive completely different answers — one lands at grade 4, the other at a grade 3 that just misses the aesthetic threshold.

What does a “borderline” grade 3 mean for my child?

A borderline grade 3 is the most misunderstood result. It does not mean your child’s teeth are perfect and need nothing done — it means their case sits right on the funding line the NHS has drawn. Plenty of children who don’t qualify for NHS braces would still benefit from treatment, particularly where crowding or a developing bite problem is likely to become harder to correct with age.

So if your child is borderline, the more useful question isn’t only “did they qualify?” but “what are their options now, and is there any benefit to acting sooner?” That’s a conversation worth having with a Specialist Orthodontist before a referral is decided, not after.

Does the IOTN score change as my child grows?

It can. NHS orthodontic funding is aimed at children and young people, and eligibility is generally assessed while the teeth are still developing — broadly up to around age 18, subject to local rules. A bite can also change as your child grows, so a grade taken at one age won’t necessarily match the picture a year or two later. It’s one of the reasons it helps to know where your child stands early rather than leaving it to chance.

What if my child doesn’t qualify — do they still need treatment?

Not qualifying for the NHS is a funding decision, not a clinical all-clear. Some children with a lower IOTN grade genuinely need nothing more than a watchful eye. Others would clearly benefit from treatment for the health and function of their bite, even though the case sits below the NHS threshold. The only way to know which is which is a proper assessment of your individual child by a specialist.

Where treatment is the right call, going private simply means it happens on your timeline rather than a waiting list. You can see your child’s options and how we keep treatment affordable on our dedicated page for families weighing up the NHS route.

How can I find out my child’s IOTN score without waiting?

Here’s the reassuring part: you don’t have to wait for an NHS referral to understand where your child stands. At Pallant Advanced Dentistry in Chichester, we offer a free specialist screening. Send us a few photos and some quick details about your child, and a Specialist Orthodontist will review them and come back to you — usually with an indication of their treatment need within a day.

It’s a simple, no-obligation way to get clarity before referrals, waiting lists or decisions come into play. Start your child’s free screening here.

Quick FAQ for parents

What does IOTN stand for?

Index of Orthodontic Treatment Need — the national scoring system used to assess how much a person needs orthodontic treatment.

What IOTN score is needed for free NHS braces?

Generally a Dental Health Component of grade 4 or 5, or a grade 3 combined with an Aesthetic Component of 6 or above. Grades 1 and 2 don’t usually qualify.

What does a borderline grade 3 mean?

It means the case sits on the NHS funding line. Your child may still benefit from treatment even if the NHS doesn’t fund it — a specialist assessment will tell you.

Can I get my child’s IOTN score before a referral?

Yes. Our free screening gives you an indication of your child’s treatment need without waiting for an NHS referral.

Is a low IOTN score a guarantee my child needs nothing?

No. A low score means the NHS won’t fund treatment, not that treatment would have no benefit. Only a specialist assessment of your child can answer that.

Understand your child’s options

Whether your child qualifies comfortably, sits on a borderline grade 3, or falls just below the NHS threshold, the most useful thing you can do is understand their options early. Our team supports West Sussex families through exactly this decision every week. Explore the options for your child or book a free screening to get a specialist answer in a day.