Dental stress markers such as enamel hypoplasia and caries are suitable indicators of population health and lifestyle, although they must be recorded and interpreted carefully. To date, they have been predominantly studied in adult samples, whereas juvenile remains are also affected by these lesions. In this study, dental enamel hypoplasia and caries were both evaluated on 613 non-adult individuals from four early mediaeval Moravian and Frankish skeletal series, who had experienced contrasting environments and lifestyles. The aim of this study is to assess the relationship between these biological traits and living conditions, and how this is manifested in the juvenile dental remains. Significant differences between populations were found in stress markers, dental lesions and the way these were manifested. Exposure to stressful conditions varies between urban and rural populations and is related to age groups. Although the children under investigation seem to have had different diets, it is difficult to distinguish the biological contribution (different enamel susceptibility) from the lifestyle contribution (different food, environment) in the formation of caries. Moreover, such studies must be interpreted carefully due to the possibility of intra- and inter-observer errors and the subjectivity of the scoring techniques. Nevertheless, this study also demonstrates that results of an investigation of juvenile skeletal remains can be as informative as a study of adults and that juvenile skeletons can be included in large bioarchaeological population studies.

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