Objectives: the comparison of malocclusion in 11-year-old children examined in the past (50 years ago) and in the present.
Materials and methods: Two groups were treated: an archive (group I) and a present (group II) group. Both archive and present material were examined. The present group consisted of 280 individuals. During the dental examination, the prevalence and types of malocclusion were estimated, and the DMF and dmf indices were calculated.
Results: In group I, the prevalence of malocclusion was 44%, and in group II it was 65%. The most prevalent disorder was Class II malocclusion (group I, 26.1%; group II, 30%), followed by cross-bite (5.7% and 12 %, respectively). Statistically significant differences in prevalence and types of malocclusion between boys and girls were not stated. In the past, treated 11-year-olds had a higher DMF index, with 3.8. Analysis including gender showed statistically significant and higher levels of the DMF index in girls. The comparison between those two groups revealed no significant differences in terms of DMF index, but a significant increase was found in dmf. Dmf in the first group was 2.4 and in the second 1.0. The results from different authors show that malocclusion increases with age, and is highest in 11-year-old children.
Conclusions: Increasing malocclusions and DMF were observed in two generations of children.