<abstract xmlns="http://www.w3.org/1999/xhtml">

The Dental Aesthetic Index (DAI) was used to assess the prevalence of unmet orthodontic treatment need in 150 13-year-old schoolchildren in Dunedin, New Zealand, and to compare the findings with those obtained in the same children at 10 years of age.
Fewer 13-year-olds (27%) had a “mandatory” need of orthodontic treatment than when they were 10 years old (33%), 20% had “no/little” need for orthodontic treatment, 33% had an “elective” need for treatment and 20% had a “desirable” need for treatment. The fall in DAI scores is attributed to over-sensitivity of the Index to mixed dentition traits.
When the individual scores were analysed, only 7% of the 10-year-olds were given the same scores as when they were 13 years old, 52% were given higher scores and 41% were given lower scores. This disagreement between scores was masked to a limited extent by the DAI categories: 49% of the 10-year-olds were assigned to the same DAI category at 13 years of age, 20% to a greater treatment-need category and approximately 30% to a lower treatment-need category.
The DAI, in common with other malocclusion indices, is unreliable over time because it is affected by developmental changes in the occlusal traits measured. Aust Orthod J 2000; 16: 150–6
</abstract>

The Dental Aesthetic Index (DAI) was used to assess the prevalence of unmet orthodontic treatment need in 150 13-year-old schoolchildren in Dunedin, New Zealand, and to compare the findings with those obtained in the same children at 10 years of age.
Fewer 13-year-olds (27%) had a “mandatory” need of orthodontic treatment than when they were 10 years old (33%), 20% had “no/little” need for orthodontic treatment, 33% had an “elective” need for treatment and 20% had a “desirable” need for treatment. The fall in DAI scores is attributed to over-sensitivity of the Index to mixed dentition traits.
When the individual scores were analysed, only 7% of the 10-year-olds were given the same scores as when they were 13 years old, 52% were given higher scores and 41% were given lower scores. This disagreement between scores was masked to a limited extent by the DAI categories: 49% of the 10-year-olds were assigned to the same DAI category at 13 years of age, 20% to a greater treatment-need category and approximately 30% to a lower treatment-need category.
The DAI, in common with other malocclusion indices, is unreliable over time because it is affected by developmental changes in the occlusal traits measured. Aust Orthod J 2000; 16: 150–6

Age changes in orthodontic treatment need: a longitudinal study of 10- and 13-year-old children, using the Dental Aesthetic Index

Australasian Orthodontic Journal

This work is licensed under the Creative Commons Attribution 4.0 International License.

The Dental Aesthetic Index (DAI) was used to assess the prevalence of unmet orthodontic treatment need in 150 13-year-old schoolchildren in Dunedin, New...

Age changes in orthodontic treatment need: a longitudinal study of 10- and 13-year-old children, using the Dental Aesthetic Index

Pubblicato online: 13 dic 2023

Pagine: 150 - 156

Ricevuto: 01 feb 2000

Accettato: 01 ott 2000

DOI: https://doi.org/10.2478/aoj-2000-0022

© 2000 Jonathan Chi et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.