Prevalence of hypodontia in orthodontic patients in Brasilia, Brazil

The purpose of this retrospective study was to determine the prevalence of hypodontia and associated dental anomalies in patients undergoing orthodontic treatment in Brasília, Brazil, over a 2 year period (1998–2000). The records of 1049 orthodontic patients between 10 and 15.7 years of age (507 mal...

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Bibliographic Details
Published in:European journal of orthodontics 2010-06, Vol.32 (3), p.302-306
Main Authors: Gomes, Raquel Ribeiro, da Fonseca, Janaína Aparecida Calaça, Paula, Lílian Marly, Faber, Jorge, Acevedo, Ana Carolina
Format: Article
Language:English
Subjects:
Adolescent
Anodontia - epidemiology
Bicuspid - abnormalities
Brazil - epidemiology
Child
Cuspid - pathology
Dentistry
Female
Humans
Incisor - abnormalities
Male
Malocclusion - epidemiology
Molar - abnormalities
Orthodontics, Corrective
Prevalence
Retrospective Studies
Tooth Crown - abnormalities
Tooth Eruption, Ectopic - epidemiology
Tooth Root - abnormalities
Tooth, Deciduous - pathology
Tooth, Supernumerary - epidemiology
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Summary:The purpose of this retrospective study was to determine the prevalence of hypodontia and associated dental anomalies in patients undergoing orthodontic treatment in Brasília, Brazil, over a 2 year period (1998–2000). The records of 1049 orthodontic patients between 10 and 15.7 years of age (507 males and 542 females) from 16 orthodontic clinics were analysed. Descriptive statistics were performed for the study variables. A chi-square test was used to determine the difference in the prevalence of hypodontia between genders. The prevalence of hypodontia was 6.3 per cent (39.4 per cent males and 60.6 per cent females) with no statistically significant difference between the genders. One case of oligodontia was observed. The maxillary lateral incisor was the most frequently missing tooth, followed by the mandibular second premolar. All cases of hypodontia, except one, were associated with at least one other dental anomaly. These associated dental anomalies were retained primary teeth (30.3 per cent), ectopic canine eruption (25.8 per cent), taurodontism (21.2 per cent), and peg-shaped maxillary lateral incisors (16.7 per cent).
ISSN:0141-5387
1460-2210
DOI:10.1093/ejo/cjp107