Non-syndromic hypodontia in an Iranian orthodontic population

Vahid-Dastjerdi, Elaheh, Borzabadi-Farahani, Ali ORCID: https://orcid.org/0000-0002-3729-2348, Mahdian, Mina and Amini, Nazila 2010. Non-syndromic hypodontia in an Iranian orthodontic population. Journal of Oral Science 52 (3) , pp. 455-461. 10.2334/josnusd.52.455

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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. (J Oral Sci 52, 455-461, 2010)

Item Type:	Article
Status:	Published
Schools:	Schools > Dentistry
ISSN:	1343-4934
Date of Acceptance:	13 July 2010
Last Modified:	17 Sep 2026 21:50
URI:	https://orca.cardiff.ac.uk/id/eprint/173327

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