Original scientific paper
Differences in the eruption of canines, premolars and second molars between children with eugnathia and malocclusion
Mario Legović
; Ambulanta za Ortodonciju Doma zdravlja Poreč, Hrvatska
Abstract
This study was undertaken in order to investigate the differences in
the eruption of C, P1, P2 and M2 between the children with malocelusions and those with eugeathia. A cohort of 1758 examinees aged from 8 to 13 year was studied. Malocclusions end eugnathia were found in 1306 (690 boys and 616 girls) and 452 (231 boys and 221 girls) of them, respectively. The investigations were conducted in the regions of Poreč and Buje in Istria. According to age, the examinees were divided into 11 classes, with the age interval of 6 months between the two adjacent classes. Analysis of the differences in the eruption of a particular tooth and a group of teeth between the children with eugnathia and those with malocclusion was carried out for each of the age classes. The results, shown in tables and statistically processeed, point to the existence of certain differences in eruption of the teeth between the children with malocclusions and those with eugnathia. In 38 age classes, more teeth had erupted in the group of children with malocclusion, in 41 age classes the same held true for the group with eugnathia, whereas in 3 age classes identical percentages of the teeth erupted were established in both groups of children. The percentage of the upper canine teeth (t = 3.27, P < 0.05) and other lower premolars (t = 2, P < 0.05) erupted was significantly higher in the group of children with eugnathia, whereas eruption of the upper first premolars (t = 2.6, P < 0.05) achieved a significantly higher percentage in the group of children with malocclusions. Eruption of the lower first premolars, lower canine and other permanent molars by the age of 9.5, 10 and years, respectively, was higher in the group of children with malocclusions, while after this age the eruption percentage was higher in the group of children with eugnathia. In the children with malocclusions, eruption of the teeth begins earlier and terminates later than in those with eugnathia.
Keywords
eugnathia; malocclusions; teeth eruption
Hrčak ID:
105420
URI
Publication date:
15.6.1985.
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