IOTN
Pronunciation: eye-OH-tee-en
Also written as: IOTN — Index of Orthodontic Treatment Need
Index of Orthodontic Treatment Need; a validated scoring system used in the UK to assess and prioritize the clinical and aesthetic need for orthodontic treatment.
Full Definition
The Index of Orthodontic Treatment Need (IOTN) was developed to provide an objective, reproducible measure of how urgently a patient requires orthodontic intervention, and is used widely in NHS orthodontic commissioning and referral pathways. It comprises two components: the Dental Health Component (DHC), graded 1–5, and the Aesthetic Component (AC), graded 1–10 using a photographic scale. Patients scoring DHC grade 4 or 5 are generally eligible for NHS-funded treatment in the UK. Editors in UK healthcare publishing must ensure the acronym is expanded on first use and that the grading values are accurately transcribed.
Usage
Usage note: Always expand on first reference: 'Index of Orthodontic Treatment Need (IOTN)'. The two components, DHC and AC, should be identified separately. Primarily relevant to UK and Commonwealth clinical documents.
In Context
- "The patient was assessed as IOTN DHC grade 4, making them eligible for NHS orthodontic treatment." — Referral letter to orthodontic department
- "IOTN scores should be clearly documented in the patient's assessment record prior to treatment acceptance." — Clinical governance policy document