British Journal of Orthodontics, Vol 21, 175-184, Copyright © 1994 by British Orthodontic Society

ARTICLES

Use of the Index of Orthodontic Treatment Need (IOTN) in assessing the need for orthodontic treatment pre- and post-appliance therapy

S Richmond, CT Roberts and M Andrews
Department of Oral Health and Development, University Dental Hospital of Manchester.

The Index of Orthodontic Treatment Need (IOTN) was used to assess the need for orthodontic treatment before and after treatment, on a systematic sample of 1225 cases. On the whole, full upper and lower fixed appliances brought about a greater improvement in Aesthetics and Dental Health Components compared to other appliance techniques, and were less likely to make the occlusion worse. It was found that certain occlusal traits were more likely to be successfully treated than others. A common problem resulting from treatment was the development of a cross-bite.

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