 This paper evaluates the untreated orthodontic needs among 10-year-old school children using two indices, Dental Aesthetic Index, DI, and Index of Orthodontic Treatment Need, IOTN, while adjusting for missing teeth in the DI due to many children being in mixed intition with unerrupted permanent teeth. While both indices identified similar numbers of children requiring orthodontic treatment, their rankings varied. This article was authored by Johnson Mark, Hartmas Michael, Crowther Paul, and others.