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Zahnheilkunde 27. Juni 2013

Association between body mass index and timing of permanent tooth emergence in Jordanian children and adolescents

Background: This study aimed at investigating the association between body mass index (BMI) and the timing of permanent tooth emergence in Jordanian children and adolescents.

Methods: A total of 2,498 Jordanian schoolchildren and adolescents aged 4–16 years were examined for permanent tooth emergence. The BMI was used to classify the subjects into 4 groups: underweight, normal weight, overweight and obese. Probit analysis was used to determine the median age at emergence of each tooth and BMI was used as a factor variable to detect statistically significant differences in the times of tooth emergence within pairs of BMI groups. In addition, binary logistic regression was used to assess the contribution of BMI grouping to the prediction of early emergence for each tooth.

Results: It was found that permanent teeth especially canines, premolars and second molars tended to emerge earlier in children with higher BMIs and later in children with lower BMIs.

Conclusions: This study showed a significant and positive relationship between BMI and earlier emergence of permanent teeth, especially phase II mixed dentition permanent teeth. These findings could be relevant in managing children with varying BMIs in the fields of orthodontics, pediatric and forensic dentistry.

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