齲蝕活動性試験と齲蝕有病との関連性に関する研究
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概要
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The purpose of the study is to ascertain prevalence of mutans streptococci and Lactobacillus in school children using Dentocult SM and Dentocult LB, and also to determine the effectiveness of various caries activity tests, including Dentocult SM, Dentocult LB, Cariostat, Dentobuff and salivary flow rate, for screening children with high risk for dental caries. Dental caries were detected on a tooth-surface basis, and measurements of salivary buffering capacity and salivary flow rate in addition to microbiological tests were carried out on 387 school children aged 4 to 19 years in Kitakyushu City. The mean number of decayed deciduous tooth-surfaces (ds) and decayed filled deciduous tooth-surfaces (dfs) decreased significantly (p<0.05), but the mean number of decayed permanent tooth-surfaces (DS) and DMF tooth-surfaces increased significantly (p<0.01) with increasing age. The prevalence rate of mutans streptococci measured by Dentocult SM was about 80% in the 4-6-year-old group, and it gradually increased with age. The prevalence rates of Lactobacillus measured by Dentocult LB were about 50% in all age groups except for the 7-9-year-old group. The percentage of children with a Dentocult LB score of 1 or more was significantly higher (p<0.05) in the 7-9-year-old group than the other age groups. Mean numbers of decayed and/or filled tooth-surfaces were significantly higher (p<0.05, 0.01) in children with higher scores on the Dentocult SM, Dentocult LB and Cariostat tests than in those with lower scores. Especially, ratios of the number of decayed tooth-surfaces at the minimum scores of Dentocult SM against those at the maximum scores were highest in both deciduous and permanent teeth when compared with those of Dentocult LB and Cariostat. The mean numbers of DMF and df tooth-surfaces were significantly lower (p<0.05, 0.01) with increasing salivary buffering capacity measured by Dentobuff. Only in deciduous teeth were mean numbers of ds and dfs significantly lower (p<0.05) in children with higher salivary flow rates. Sensitivity and specificity in screening high risk children for dental caries were highest in scores of 1 or more on the Dentocult LB test than any other caries activity test when only one test was adopted. However, much higher sensitivity and specificity were gained (65.9% and 70.2% respectively) when Dentocult SM, Dentocult LB and Cariostat were combined. These results suggest that it is better to combine three caries activity tests for effectively screening 4-19-year-old people with high risk for caries. This might enable more efficient preventive care to be provided for selected children.
- 九州歯科学会の論文
- 1994-06-25