Abstract
Abstract Objectives: Nowadays in pediatric dentistry, a raise in oral-dental health studies in twins, had been observed with the increasing twin births. The aim of this study was to investigate the differences in terms of oral-dental health between twin children and singleton children. Materials and Methods: A total of 180(105girls, 75 boys)children,120 of them twins and 60 of them singleton, aged 4 to 14 years,were included to the study.All children were healthy.A questionnaire,with 30 items, including the educational level of the parents, age, gender and brushing habits of the children was applied.The df-t /df-s index for primary teeth and DMF-T /DMF-S index for permanent teeth were recorded. Streptococcus Mutans(SM) values of all children were recorded with the help of chairside kits. Results: In-vitro fertilization(IVF) birth rate was 28.3% in the whole group. Furthermore, 33.3%of the children were monozygotic twins, 66.6% of them were dizygotic twins.There were no statistically significant relationship between the DMFT-dft values and daily teeth brushing of children (p>0.05). A statistically significant correlation was found between mothers’ education levels and DMFT values of children (p>0.05). DMFT values of children whose mothers’ were university graduates were found to be significantly lower than those of primary and high school graduates (p>0.05). In the monozygotic group; in SM positive cases,the level of dft-dfs was statistically significantly higher than those of SM negative cases (p<0.05). In dizygotic twins and singleton children;DMFT-DMFS levels were significantly higher in SM positive cases than those of SM negative cases (p<0.05).In singleton children the DMFT-DMFS values were statistically significantly higher than twins whereas there was no statistically difference between monozygotic and dizygotic twins. Conclusions: As a result of this study, despite that there was no significant difference in teeth brushing habits between twin and singleton children, the SM values and DMFT-DMFS values were found higher in singleton children. Considering the multifactorial dynamics of dental caries formation, many factors such as saliva, nutrition, immune system, as well as oral hygiene habits should be considered as a whole.
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