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Non-syndromic hypodontia in an Iranian orthodontic population
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Vahid-Dastjerdi, Elaheh, Borzabadi-Farahani, Ali, Mahdian, Mina and Amini, Nazila (2010) Non-syndromic hypodontia in an Iranian orthodontic population. Journal of Oral Science, Volume 52 (Number 3). pp. 455-461. doi:10.2334/josnusd.52.455 ISSN 1343-4934.
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Official URL: http://dx.doi.org/10.2334/josnusd.52.455
Abstract
To investigate the prevalence, characteristics (ie, malocclusion, location, type), and sex distribution of hypodontia in an Iranian orthodontic population. A retrospective study was conducted using periapical and panoramic radiographs and study models of 1,751 subjects attending university orthodontic clinics (870 females, 881 males, age 9-27 years). The Chi-square test was used to analyze differences in the distribution of hypodontia, after stratification by sex and malocclusion type. A total of 197 congenitally missing teeth were observed in 160 patients (9.1%; 74 boys and 86 girls); there were no statistically significant differences between sexes (Chi-square = 0.832, P = 0.36). Hypodontia was more common in patients with Class III malocclusion (45.2%), and was more prevalent in the maxilla (71%) than in the mandible (29%). Maxillary lateral incisors (35.6%) and maxillary second premolars (13.0%) were the most commonly missing teeth, followed by mandibular lateral incisors (9.6%) and mandibular second premolars (8.2%). The prevalence of missing teeth was higher in the anterior segment (incisors and canines) than in the posterior segment (premolars and molars). The prevalence of oligodontia was 0.34%. The prevalence and characteristics of the most frequently missing teeth accorded with the findings of most studies conducted in other countries.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School | ||||
Journal or Publication Title: | Journal of Oral Science | ||||
Publisher: | Nihon University School of Dentistry | ||||
ISSN: | 1343-4934 | ||||
Official Date: | September 2010 | ||||
Dates: |
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Volume: | Volume 52 | ||||
Number: | Number 3 | ||||
Page Range: | pp. 455-461 | ||||
DOI: | 10.2334/josnusd.52.455 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Open Access (Creative Commons) |
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