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  • Title: Supernumerary teeth amongst Iranian orthodontic patients. A retrospective radiographic and clinical survey.
    Author: Vahid-Dastjerdi E, Borzabadi-Farahani A, Mahdian M, Amini N.
    Journal: Acta Odontol Scand; 2011 Mar; 69(2):125-8. PubMed ID: 21142585.
    Abstract:
    OBJECTIVE: To investigate the prevalence, characteristics (malocclusion, location, type) and gender distribution of supernumerary teeth (ST) in an Iranian orthodontic population. MATERIAL AND METHODS: A retrospective study was carried out using radiographs (periapicals, panoramic) and study models of 1751 subjects (870 girls, 881 boys; age range 9-27 years). The Pearson chi-square test was used to determine differences in the distribution of ST when stratified by gender and malocclusion type. RESULTS: Fourteen ST were found in 13 patients (six males, seven females), giving a prevalence rate of 0.74%. The prevalence rate of ST was higher in Class III malocclusions (5.2%) and was a rare finding among Class II malocclusions (0.1%). The occurrence rate of ST was higher in maxilla (78.5%) than in mandible (21.5%). The most common type of ST was the conical form (43%). We did not observe any late-developing paramolar or distomolar ST. CONCLUSION: The prevalence rate of ST in our study was 0.74% and ST were more common among Class III malocclusions.
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