Age changes in orthodontic treatment need: a longitudinal study of 10- and 13-year-old children, using the Dental Aesthetic Index
Jonathan Chi, Mark Johnson, Michael Harkness
A comparison of two methods of assessing orthodontic treatment need in the mixed dentition: DAI and IOTN
Mark Johnson, Michael Harkness, Paul Crowther, Peter Herbison
Prevalence of malocclusion and orthodontic treatment need in 10-year-old New Zealand children
Mark Johnson, Michael Harkness