A Statistical Study of the Association of Seven Dental Anomalies in the Brazilian Population

There are more than 500 anomalies caused by simple genetic factors and perhaps an equal number of others derived from multifactorial causes or chromosome aberrations where there are orofacial alterations. The frequency of symptom-less carriers of heredity anomalies that affect the teeth can be calculated from genetic data that is often essential to advise on the probability of affected offspring (Salzano, 1982). The specter of a possible association among dental anomalies was reported by Hoffmeister between 1975 and 1985 (Hoffmeister, 1975; 1977; 1985). The following manifestations were found in three consecutive generations of one family: multiple tooth loss, upper side incisive agenesis, ectopic eruption of the permanent maxillar first molar and intra-bone displacement of the upper canines. The objective of the present investigation was to prove the existence of significant association among seven different types of anomalies: second pre-molar agenesis, upper side incisive reduced in size, lower Int. J. Morphol., 26(2):403-406, 2008.