الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 136 |  |  |
| | | from | 136 | | |
Abstract
This study was conducted on 3020 healthy Egyptian children (1510 boys and 1510 girls) aged (8 -14) years old. The children were selected from 94 primary and preparatory schools in Tanta between March 2016 and February 2017, and their teeth were examined clinically according to WHO criteria for oral health survey for presence of selected dental anomalies (hypodontia, hyperdontia, microdontia, macrodontia, peg shape lateral, cusp of carabelli, talon cusp, fusion, gemination, dens invaginatus, enamel hypoplasia, demarcated opacities, diffuse opacities, and transposition) The data were recorded at previously prepared examination charts, and the results of the study showed that total prevalence of anomalies was 20.36%, as follow: hypodontia was 0.63%, hyperdontia was 0.3%, microdontia was 0.2%, peg shape lateral was 0.63%, cusp of carabelli was 5.5%, talon cusp was 0.23%, and gemination was 0.03%, enamel hypoplasia was 2.38%, demarcated opacities were 9.4%, diffuse opacities were 2.15%, and transposition was 0.07%. On the other hand, there were no cases of macrodontia, fusion, or dens invaginatus were detected in this study. After statistical analysis using SPSS, there were no significant differences regarding gender or residence area except for peg shape lateral showed higher prevalence in rural areas (p value < 0.05). Based on these findings it was concluded that: 1. The total prevalence of anomalies was 20.36% among school children in Tanta 2. About fifth of children were affected by at least one anomaly which is comparable to other studies. 3. Enamel defects showed the highest prevalence of all dental anomalies in the study & demarcated opacities were the most frequent enamel defect. 4. No significant differences between males and females in prevalence of dental anomalies. 5. Rural areas showed higher prevalence of peg shape lateral. 6. Macrodontia, double teeth, and dens invaginatus can be considered as rare anomalies in permanent teeth. 7. Dental anomalies may occur without relation to a disease or syndrome.