Title: 3262 - Predicting Caries in Preschool Children Using Salivary Mutans Streptococci


Yoshimori Uchikawa (Presenter)
Nippon Dental University Hospital

Terumi Iwasaki, Nippon Dental University Hospital


Objectives: The purpose of this study was to evaluate the utility of baseline salivary mutans streptococci (SMS) levels in predicting caries in preschool children according to age and to investigate the optimum time to perform such examinations.

Methods: The subjects were 980 healthy 2- to 5-year-old children attending kindergartens in Yokohama, Japan. The children were divided into 4 groups according to their age at baseline: namely, 2, 3, 4 and 5 years old. The children were clinically examined by an experienced dentist at baseline and then again one year later. At the baseline examination, the Dentcult SM Strip mutans test (Orion Diagnostica, Finland) was performed in accordance with the test manufacture's instructions in order to examine the presence and the level of SMS.

Results: The Δdmfs values increased with the SMS score in every age group, and there was a significant correlation between the Δdmfs values and the SMS score. The correlation coefficient was the highest in 3-year-olds.There was also a significant ROC curve between the disease (Δdmfs > 0) and the SMS score in each age group (P < .05). The effectual cut-off point for the SMS score was 2 in the 2-year-olds and 3-year-olds, and 1 in the 4-year-olds and 5-year-olds. The relative risk in the 2, 3, 4, 5 year-old group was 3.19, 3.10, 2.27 and 2.18, respectively (P < .01), and the sensitivity and specificity values were 130, 139, 131 and 132, respectively.

Conclusions: These findings reconfirmed that the predictive ability of caries according to the SMS level was high in preschool children and that this predictive ability in preschool children varied by age, suggesting that 3 years of age is the most effective time to measure the SMS levels.

This abstract is based on research that was funded entirely or partially by an outside source:
Research supported by JSPS KAKENHI Grant Number 15k11375 for Y. Uchikawa in Japan.

Disclosure Statement:
The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: None