[Incidence of dental caries in a child population from Mostoles: evaluation of a preventive program after 2 years]

To know the efficacy and effectivity od dental health program after 2 years.

The study of prospective cohorts not aleatorized.

The exposed cohort is composed of 583 school children, 296 girls and 287 boys, the non-exposed cohort is composed of 261 school children, 132 girls and 129 boys. We carried out and odontological exploration following the criteria of the WHO the preventive measures we carried out are health education, weekly mouthrinse of NaFl at 0.2%, occlusive sealant in the first permanent molar and external application fluorine gel. We measured and compared the different indexes of tooth decay and sociodemographic variables between both cohorts, the statistic meaning has been determined through the U est of Mann Whitney.

We have found statistically significant differences between both cohorts in the indexes of decay in the exposed cohorts. The indexes of decay in the exposed cohort being DMFT: 0.31; DMFM (first permanent molar): 0.31; DMFS: 0.4. And in the non-exposed cohort DMFT: 0.81; DMFM: 0.81; DMFS; 1.09. Existing an epidemiological association between the preventive program and the prevention of dental decay with a relative risk of 0.24 (95% CI, 0.17-0.33) and the prevention fraction of 76.3% (95% CI, 67-83).

The preventive program after two years elapsed is effective and has a clear protector effect.