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March 19, 2025

Orthodontic treatment: who qualifies?

Generally speaking, free orthodontic treatment on the NHS is only available for children who are under the age of 18. NHS orthodontic treatment is usually not available to adults unless there are specific health reasons.

If you consider that your child should qualify for free orthodontic treatment or you think that you yourself should have had free orthodontic treatment as a child, then you may be interested to know that Orthodontists, operating on NHS contracts, now use a standardised rating system to assess an individuals eligibility for treatment.

This system is referred to as the Index of Orthodontic Treatment Need (IOTN) and was introduced in 2006. This rating system is only used in children under the age of 18. Any consideration of whether an adult qualifies for free NHS treatment is done on a case-by-case basis.

This rating system takes into account the aesthetics of a child’s teeth, together with the health of the teeth. The teeth are ranked between 1 and 5 and the scores indicate the following:

• IOTN 1 – the teeth are almost perfect
• IOTN 2 – the teeth have some irregularities
• IOTN 3 –  greater irregularities which normally do not need treatment for health reasons
• IOTN 4 – more severe degrees of irregularity and these do require treatment for health reasons, and
• IOTN 5 – severe dental health problems.

Free treatment on the NHS is available for grade 4 and grade 5 cases. Treatment can be available for some grade 3 cases but this is usually assessed on more of an individual basis.

Our experience

Unfortunately we have acted for numerous clients where there was a failure by their dentist to refer them to an Orthodontist for a further opinion as to whether they should receive orthodontic treatment. In each of these cases, we were able to say with medical evidence, that a referral to an Orthodontist should have happened when they were under the age of 18 and given the orthodontic condition of their teeth, they would have qualified for free NHS treatment. As a result of the failure to refer our clients to an Orthodontist, they now have to pay privately for costly orthodontic treatment, as it is no longer free to them on the NHS.

If you have suffered problems with orthodontic treatment or you feel that you should have been provided orthodontic treatment as a child, please call the Dental Negligence Team who will be happy to assist.

Got a question?

Message the team

You can call the team on 0800 923 2080 or message them to understand more about you potential compensation claim for dental negligence. We will get back to you at a time that is convenient to you.

Common claim types

Compensation for undiagnosed gum disease
If you have experienced dental injury as a result of undiagnosed gum disease (also known as periodontal disease), our specialist dental negligence solicitors are here to help you.
Compensation for undiagnosed mouth cancer
We have a long history of high value claims involving undiagnosed mouth cancer where we have won our clients the compensation they deserved for negligent dental treatment.
Compensation for undiagnosed tooth decay
If diagnosed early enough, tooth decay can be treated with a simple filling. However if your dentist fails to diagnose tooth decay, there can be much more serious consequences.
Dental implant negligence
If you have suffered consequences resulting from negligent dental implants then you should contact The Dental Negligence Team to discuss this further.
Dental nerve injury compensation
Nerve injury can occur due to negligent dental treatment when the trigeminal nerve is disturbed. This nerve is the main nerve responsible for sensation in the face and motor functions.
Negligent cosmetic dentistry
You will have undergone cosmetic dentistry to improve the overall look of your teeth, so it can be distressing if you have been left with failed cosmetic dentistry.
Negligent crown and bridgework
Where a patient has crowns and/or bridges placed, there are a number of ways in which negligent crown and bridgework may be provided.
Negligent Orthodontic Treatment
If you have experienced dental injury in relation to orthodontics, we may be able to help you with a claim for compensation.
Negligent root canal treatment
If you feel that the injury was due to negligence on the part of your dentist, you may have a claim for compensation.
Negligent wisdom teeth extraction
The extraction of wisdom teeth is one of the most common procedures carried out in the UK. Extraction may be required if a wisdom tooth is decayed.
Tooth extraction negligence
If you need an extraction, and the dentist removes the wrong tooth or damages another tooth in the process, then you may have a claim for compensation.

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