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  • Title: Influence of colonization with mutans streptococci on caries risk in Japanese preschool children: 24 month survival analysis.
    Author: Ansai T, Tahara A, Ikeda M, Katoh Y, Miyazaki H, Takehara T.
    Journal: Pediatr Dent; 2000; 22(5):377-80. PubMed ID: 11048304.
    Abstract:
    PURPOSE: This study evaluates how various microbial- and salivary-related risk factors influenced the hazard for caries development in preschool children. METHODS: The study population consisted of 131 subjects (age: 0.5 to 6.0 yrs). Oral examination, including two bacterial tests and buffering capacity test, was conducted at six month intervals over 24 months. A survival analysis was used to describe caries hazard over a 24-month follow-up period. A Cox proportional hazards regression analysis was performed to test the influence of salivary mutans streptococci (MS), aciduric bacteria, buffering capacity and age on caries development. RESULTS: Of the total subjects, 60 children (46%) were found to be caries-free at baseline. Caries hazard correlated significantly with salivary MS levels at baseline (relative risk, 1.7; P = 0.003), but not with aciduric bacteria and buffering capacity. This analysis showed that all of children with high colonization of MS at baseline had dental caries 15 months later. CONCLUSION: The results suggest that salivary MS level at baseline influenced caries hazard in preschool children.
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