An epidemiologic study of dental space anomalies in Icelandic schoolchildren.

This study was performed mainly to determine the prevalence of space anomalies with regard to the various stages of dental development in Icelandic schoolchildren. The sample consisted of 1,641 randomly selected children (791 boys and 850 girls), making up 9.5% of the children attending all primary and secondary schools in Reykjavík during the school year 1972--73. In most of the frequencies of the different space anomalies boys showed a higher prevalence than girls. In both sexes there was often a significant difference from one stage of dental development to another. The results were compared with those reported for other ethnic groups.