References
- Kerr, W. J. S., Buchanan, I. B. and McColl, J. H. (1993) Use of the PAR index in assessing the effectiveness of removable orthodontic appliances, British Journal of Orthodontics, 20, 351–357.
- O'Brien, K. D., Shaw, W. C. and Roberts, C. T. (1993) The use of occlusal indices in assessing the provision of orthodontic treatment by the hospital orthodontic service of England and Wales, British Journal of Orthodontics, 20, 25–35.
- Richmond, S., Roberts, C. T. and Andrews, M. (1994) Use of the Index of Orthodontic Treatment Need (IOTN) in assessing the need for orthodontic treatment pre- and post-appliance therapy, British Journal of Orthodontics, 21, 175–184.