Index for orthodontic treatment needs is/are:

SCAN index is the synonym for Index for Orthodontic Treatment Needs (IOTN). IOTN index was developed by BROOK and SHAW to link dentofacial variation to perceive esthetic impairment. Key Concept: The other Orthodontic treatment need indices are: Handicapping Labio-lingual Deviation Index (HLD) (Draker) Dental Aesthetic Index (DAI) (Cons et al) Index of Complexity, Outcome and Need (ICON) (Daniels & Richmond)