References
- Alexander, A. G. and Tipnis, A. K. (1970) The effect of irregularity of teeth and the degree of overbite and overjet on gingival health, British Dental Journal, 128, 539–544.
- Cryer, B. S. (1965) Lower arch changes during the early teens, Transactions of the European Orthodontic Society, 87–99.
- Geiger, A. M. (1962) Occlusal studies in 188 consecutive cases of periodontal disease, American Journal of Orthodontics, 48, 330–342.
- Gould, M. S. E. and Picton, D. C. A. (1966) The relation between irregularities of the teeth and periodontal disease: a pilot study, British Dental Journal, 121, 20–23.
- Gray, P. G., Todd, J. E., Slack, G. L. and Bulman, J. S. (1970) Adult dental health in England and Wales in 1968, H. M. S. O.
- Hellgren, A. (1956) The association between crowding of the teeth and gingivitis, Transactions of the European Orthodontic Society, 134–140.
- Helm, S. (1970) Prevalence of malocclusion in relationship to development of the dentition, Acta Odontologica Scandinavica, 20, Supplement 58.
- Myllarniemi, S. (1970) Malocclusion in Finnish rural children, Suomen Hammaslaakariseuran Toimituksia, 66, 221–264.
- Seipel, C. M. (1946) Variations of Tooth Position, Svensk Tandlakare-Tidskrift, 39, Supplement.
- Wood, T. J. (1968) Aesthetics and orthodontics, Transactions of the British Society for the Study of Orthodontics, 1–14.