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PubMed1992

The DMF index.

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DMF Index↗
PubMed1979

[Alveolysis in adolescents: prevalence and correlation with the DMF index, the OHI-S index and the PM index according to sex, age and occupation (Geneva 1970-1972)].

A randomized sample of 1392 girls and boys, 16 to 20 years old and living in the canton of Geneva have been studied through their own history, clinically and radiologically in 1970-72 during an epidemiological and socio-economical study. The rate of alveolar bone resorption (radiographic method of Marshall-Day and Shourie, with Schei grid), the degree of gingival inflammation (PM index), the oral health (OHI-S index) and the carious frequency (DMFS index) have been determined. For the same sample, an indication of the duration of caries prevention through fluoride tablets, the frequency of daily toothbrushing and the dento-facial anomalies (Angle classes) were known. Through statistical analysis, it was shown that the mean rate of alveolar resorption was 0.85 (standard deviation 1,99) for the whole sample, that 24,16% of the subjects had a zero rate, 90% of the children having a rate of no more than 3,74 and that the maximum observed rate was 20. On the other hand, this bone resorption rate was statistically significantly correlated with the PM index and the OHI-S index. However no significant correlation has been shown between alveolar resorption and the other oral characteristics such as carious attack, toothbrushing, duration of caries prevention, dento-facial anomalies.

Adolescent↗
PubMed1992

Lactobacilli from the dentin and saliva in children.

Lactobacilli were detected simultaneously in saliva, dental plaque and carious dentinal plaque in 66 children aged 5 to 15 years. The dentinal plaque samples numbered 15. It was found that Lactobacilli were present in 100% of the dentin samples, 70% of the saliva samples and 29% of the plaque samples. The DMF index and dentinal lactobacilli are systematically linked. The DMF index is weakly linked to salivary and independent of plaque lactobacilli. It is concluded that (1) dentin is responsible for the salivary hypercontamination and (2) the Lactobacillus Count could hardly be a predictive test.

Adolescent↗
PubMed1976

Serum and salivary antibodies to cariogenic bacteria in man.

Antibodies in serum and parotid saliva against cell wall preparations from four serotypes of S mutans were examined in 110 subjects aged 18 to 25 years. In subjects with no detectable carious lesions, significant negative correlations were found between the DMF index and serum IgG and IgM antibodies, especially in S mutans of serotype c, whereas positive correlations were found between the DMF index and salivary IgA antibodies. In subjects with active caries, positive correlations were found between serum IgG antibodies and S mutans (serotypes c and a) and the DMF index. Sequential antibody analysis during a period of up to 32 months showed that development of carious lesions was associated with a rise in serum antibody titer to S mutans, but no change was detectable in salivary antibodies. Treatment of caries led to a decrease in serum IgG and IgM antibodies to S mutans cell wall, but in parotid saliva an increase in antibody titer to a culture extract of S mutans was found. The results support the concept of dental caries as an infective disease and suggest that serum antibodies may contribute to caries immunity in man.

Adolescent↗