The European Journal of Orthodontics Advance Access published online on October 16, 2009
The European Journal of Orthodontics, doi:10.1093/ejo/cjp107
Prevalence of hypodontia in orthodontic patients in Brasilia, Brazil
* Dental Anomalies Clinic, University Hospital of Brasilia
** Department of Dentistry, Faculty of Health Science, University of Brasilia
*** Private Practice, Brasilia, Brazil
Address for correspondence Ana Carolina Acevedo, Faculdade de Ciencias da Saúde, Department Odontologia, Campus Darcy, Ribeiro - 70910-900, Brasilia DF, Brazil, E-mail: acevpoppe{at}gmail.com
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Abstract |
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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).