Prevalence of ideal occlusion and dental malocclusion in 12-13 years old students in Zahedan

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The purpose of this study was to evaluate the prevalence of ideal occlusion and other dental malocclusion based on Angle Classification in the 12-13 years old students in Zahedan-Iran in 2001. Because in this ages permanent dentition is completed. The data were derived from clinical examination of 630 samples (315 females, 315 meals), which selected randomly. Clinical examination was performed in natural light by dental mirror. We had a questionnaire for each sample. The results showed: Ideal occlusion 7.9% (50 samples), Class. I malocclusion 76.9% (484 samples), Class. II Division.1 12.7% (80 samples), Class. I Division.2 12.7% (80 samples), pseudo CL.III 0.5% (3 samples), CL.III 0.6% (4 samples). The results showed there were no significant difference between males and females. The most prevalence was related to CL.I malocclusion and the least prevalence was related to CL.III.

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