1. Bailleul-Forestier I, Molla M, Verloes A, Berdal A . The genetic basis of inherited anomalies of the teeth: part 1: clinical and molecular aspects of non-syndromic dental disorders. Eur J Med Genet 2008; 51: 273–291.
2. Crawford P J, Aldred M J . Anomalies of tooth formation and eruption. In Paediatric dentistry. Oxford: Oxford University Press, 2005.
3. Chadwick B, Pendry L . Children's dental health in the United Kingdom 2003: non-carious dental conditions. London: Office for National Statistics, 2004.
4. Chestnutt I, Pendry L, Harker R . Children's dental health in the United Kingdom 2003: the orthodontic condition of children. London: Office for National Statistics, 2004.
5. Harris D . Types, causes and treatment of physical difference. In Lansdown, Rumsey N, Bradbury E, Carr T, Partridge J (eds) Visibly different: coping with disfigurement. Oxford: Butterworth-Heinemann, 1997.