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Abstract(Please copy/paste the abstract send to the congress) : |
Hessari Hossein1&2, Mortazavi Mahsa3&1, Shirazi Mohsen3 1: Research Center for Caries Prevention, Dentistry Research Institute, Tehran University of Medical Sciences , Tehran , Iran 2: Community Oral Health Department, School of Dentistry, Tehran University of Medical Sciences , Tehran Tehran 3: Department of Orthodontics , School of Dentistry, Tehran University of Medical Sciences , Tehran, Iran Objectives: Inequality in oral health addresses social, cultural, national, district, regional as well as gender inequalities. Skeleto-dental anomalies as a major determinant for oral and dental diseases is a neglected epidemiologic issue which result in inequality in oral health. The aim of present study is to evaluate the prevalence of preventable skeleto-dental anomalies among 9- to 11-year –old children. Methods and material: The literature of orthodontics was reviewed and all skeleto-dental indices expressing any dimension of preventable skeleto-dental anomalies collected. The skeleto-dental anomalies were assessed in six parts: facial appearance, tooth-arch form, transverse dimension, saggital dimension, vertical dimension, and functional anomalies. The study was performed in 2015 in Tehran, Iran, using cluster random sampling method. Among 19 districts in Tehran, totally, 38 schools were selected, data for 1585 subjects were collected. Data were analyzed by SPSS Version 20. Chi-square test was used to compare the frequency values between subgroups, and differences were considered significant with a p-value<0.05. Results: Of all, 800 were girls, 828 were 10 years or less, and 757 were more than 10. 73.4% had an ovoid arch form, 15% had an asymmetric face, 53.8% had a Cl I angle classification, 24.4% Cl II with mandibular deficiency, 8.7% Cl II with maxillary excess, 8.4% Cl II combined and 4.7% Cl III Angle classification. constricted maxilla was observed in 3.5% of subjects, with no difference between boys and girls. More than half of subjects (51.1%) had crowding. Normal overjet was observed in 47.1% of all children, 41.5% of the them had an increased overjet, 16.3% had an anteroposterior crossbite, and 11.8% lateral crossbite. Midline discrepancy was seen in 61.1% of children, and 14.2% had signs of mouth breathing with higher figure for boys (17.6%) comparing to girls (10.1%). Conclusion : Considering the fact that he majority of 9- to-11-year-old children have at least one inter-arch problem, well-timed preventive measures should be performed in all levels of oral health system. |