Developmental Causes
1. Abnormality in the number of teeth:
· Anodontia: This abnormality results in a complete lack of teeth development, which is rare and most often occurs in a condition known as hypohidrotic ectodermal dysplasia.
· Hyperdontia: This is the development of extraneous teeth and is mostly found to occur amongst the Asian race, but statistics also show that there is a 1-3% of occurrence in Caucasians as well.
· Hypodontia: This abnormality is recognised as the lack of one or more than one teeth.
· Oligodontia: This abnormality is featured by the absence of six or more teeth.
· Anodontia: This abnormality results in a complete lack of teeth development, which is rare and most often occurs in a condition known as hypohidrotic ectodermal dysplasia.
· Hyperdontia: This is the development of extraneous teeth and is mostly found to occur amongst the Asian race, but statistics also show that there is a 1-3% of occurrence in Caucasians as well.
· Hypodontia: This abnormality is recognised as the lack of one or more than one teeth.
· Oligodontia: This abnormality is featured by the absence of six or more teeth.
2. Abnormality in size:
· Macrodontia: This is featured by large teeth and occurs in the pituitary gigantism and pineal hyperplasia.
· Microdontia: This is featured by small teeth and occurs most commonly in a maxillary lateral incisor.
· Macrodontia: This is featured by large teeth and occurs in the pituitary gigantism and pineal hyperplasia.
· Microdontia: This is featured by small teeth and occurs most commonly in a maxillary lateral incisor.
3. Abnormality in shape:
· Fusion is an abnormality where two adjacent developing teeth merge into one tooth.
· Densindente is characterised by a deep invagination in a tooth, which causes the appearance of a tooth within a tooth.
· Taurodontism is a condition where the body of a tooth and pulp chamber is enlarged and is associated with a condition called the Klinefelter’s syndrome.
· Fusion is an abnormality where two adjacent developing teeth merge into one tooth.
· Densindente is characterised by a deep invagination in a tooth, which causes the appearance of a tooth within a tooth.
· Taurodontism is a condition where the body of a tooth and pulp chamber is enlarged and is associated with a condition called the Klinefelter’s syndrome.
4. Abnormality in structure:
· Dentinogenesis imperfecta: This is a condition where the dentin fails to form properly.
· Amelogenesis imperfecta: This is a condition in which the enamel of the tooth does not form properly at all.
· Dentindysplasia: This is a disorder in which the roots and the pulp of the teeth maybe affected.
· Dentinogenesis imperfecta: This is a condition where the dentin fails to form properly.
· Amelogenesis imperfecta: This is a condition in which the enamel of the tooth does not form properly at all.
· Dentindysplasia: This is a disorder in which the roots and the pulp of the teeth maybe affected.