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

Abstract

SUMMARY:The objective of this study was to show the association patterns among seven types of dental anomalies (second pre-molar agenesis, upper side incisive reduced in size, lower first molar infra-ochlesis, enamel hypoplasia, first molar ectopic eruption, supra numerous teeth and upper canine ectopic eruption) in a population sample without dental treatment ranging in age from 7 to 14. A total of 172 patients were attended and underwent the clinical examination at the Clínica Infantil da Fundação Educacional de Barretos. Eleven patients from this total were selected according to a first dental anomaly diagnosis and submitted to panoramic radiography. A significant association (p<0.05) was detected among six pairs of anomalies (second pre-molar agenesis x first pre-molar ectopic eruption; second pre-molar agenesis x lower first molar infra-ochlesis; second pre-molar agenesis x upper side incisive reduced in size; supra numerous teeth x reduced size upper side incisive; first pre-molar ectopic eruption x enamel hypoplasia; lower first molar infra-ochlesis x upper side incisive reduced in size) suggesting a common genetic origin for these conditions. The association was not significant in only one case where there was anomaly sharing by the patients. The existence of an anomaly is clinically relevant for early diagnosis of a possible association and an anomaly can indicate an increased risk of other anomalies.

Prevalence of oro-dental anomalies among schoolchildren in Sana'a city, Yemen

“…This figure is close to the findings of another study in Yemen by Balkees and Garib (0.2%) (14), and also to data from the United Kingdom (0.8%) (15) and a study of 1260 Brazilian children (0.3%) (12), but significantly less than what was found in Sweden (1.9%) (13) and a smaller study of 172 Brazilian children (2.3%) (2). Supernumerary teeth occur frequently in the permanent dentition, more so in the anterior region as mesiodens than in other parts of the arches (13).…”

“…If untreated, these may persist throughout life leading to physical growth disorder (1). 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 (2). Dental anomalies can be evidence of systemic disease and may have more than one cause (3).…”

Concrescence: Cone-Beam Computed Tomography Imaging Perspective

“…Most of the anomalies are genetic with multifactorial etiology [11]. The most important anomaly associated with a number is supernumerary teeth.…”

Agenesia de Terceros Molares, Prevalencia, Distribución y Asociación con otras Anomalías Dentales

“…En este sentido Harris & Clark (2008), después de comparar la prevalencia de agenesia entre individuos de población blanca y negra en los Estados Unidos, opinaron que los valores de prevalencia de población blanca no deben ser extrapolados a otros grupos. Otros estudios han demostrado que la agenesia dental es una anomalía que suele estar asociada a otras, lo cual puede explicarse con base en su origen genético (Al-Nimri & Bsoul, 2011;Garib et al, 2009;Miziara et al, 2008). Tomando en cuenta la alta prevalencia de agenesia de los terceros molares, su variación entre razas y etiología genética es importante establecer la asociación de otras anomalías dentarias en pacientes con agenesia de terceros molares.…”