NHS orthodontic treatment is available for children under the age of eighteen who demonstrate a clear clinical need for teeth straightening. Eligibility is determined using the Index of Orthodontic Treatment Need scale to assess dental health. Only patients with high ratings for functional issues qualify for government-funded care. Adults are generally not eligible for NHS braces unless treatment is required for severe medical reasons. The NHS provides standard metal braces to improve dental function and health. Cosmetic options like clear aligners and ceramic braces are not covered by the health service.