Prevalence of oral lesions and normal variants of the oral mucosa in 12 to 15-year-old students in Tehran, Iran

There are relatively few systematic studies, documenting the prevalence of mucosal disorders in children and adolescents. The purpose of this study was to determine the prevalence of oral lesions in 12- to 15-year olds living in Tehran and to assess the possible relationship between the occurrence of these lesions and gender. Across-sectional study was designed in which 1020 adolescents were participated. The sample size was based upon an expected oral lesion prevalence of 25%, a precision of 0.05 and a confidence level of 99. Epi-info version 6.0 was used for statistical analysis. Two hundred eighty-six adolescents [28.0%] were diagnosed with at least one oral mucosal lesion at the time of the examination. The prevalence of any oral mucosal lesion was 29.2% among the boys and 26.9% among the girls. With the exception of melanotic macules, there were no statistically significant differences in oral mucosal lesion prevalence by gender. More than 28% of the adolescents were found to have at least one oral mucosal lesion. Melanotic macule was found to be proportionally more common in boys than girls

Caries patterns in the primary dentition: cluster analysis of a sample of 5169 Arizona children 5-59 months of age / 国际口腔科学杂志·英文版

<p><b>AIM</b>Cluster analysis was conducted on data from 5,169 United States (U.S.) Arizona children, age's 5-59-months with the goal of delineating patterns of caries in the primary dentition of pre-school children without a priori pattern definitions.</p><p><b>METHODOLOGY</b>Cluster analyses were conducted using all data for children ages 0-4 years in aggregate: (1) for all subjects, and (2) for subjects without crowned restored teeth. Each of these two sets of analyses consisted of 8 differently specified cluster analyses as a validation procedure.</p><p><b>RESULTS</b>The caries patterns identified from the clustering analysis are: (1) smooth surfaces (other than the maxillary incisor), (2) maxillary incisor, (3) occlusal surfaces of first molars, and (4) pit and fissure surfaces of second molars.</p><p><b>CONCLUSION</b>The cluster analysis findings were consistent with results produced by multidimensional scaling. These cross-validated patterns may represent resulting disease conditions from different risks or the timing of various risk factor exposures. As such, the patterns may be useful case definitions for caries risk factor investigations in children under 60 months of age.</p>