Estudio evolutivo de la eficacia de materiales de resina autograbadores usados como selladores de fosas y fisuras en niños portadores de aparatos de ortodoncia

Résumé

ABSTRACT: The aim of this thesis was to evaluate the clinical efficacy of a self etching sealant versus conventional sealants in children undergoing therapy with fixed orthodontic appliances. We studied 225 sealants applied to 51 children, aged between 6 and 16 years old, all carrying fixed orthodontic appliances. Sealants were placed in 81 molars (first and second molars) and 144 premolars (first and second premolars), all caries free. The teeth were sealed with AdheSE¿ One F Helioseal¿, orthophosphoric acid 37% with Helioseal¿, Prevent Seal and Vertise¿ Flow. The behavior of sealants was studied regarding the following variables: sex, age, health, treated tooth and material used. Clinical evaluation was performed at 3, 6, 9 and 12 months, by a single examiner. The presence of pit and fissure sealant, anatomic form, color match, marginal discoloration, marginal adaptation, surface roughness and recurrent caries were investigated. Collected data were statiscally analysed using a Pearson's test, a residue analysis and an analysis of variance with repeated measures of variation factors, and the method of least significant difference. The finding of this study showed that the conventional sealant, Helioseal¿, had a better clinical behaviour than self-etching sealants. Etching enamel with orthophosphoric acid at 37% before Helioseal improved our findings. We had the worse results when using Prevent seal and Vertise¿ Flow. In patients under 11 years old the clinical performance of sealants was worse than in older ones. The sex of the children did not influence the development of sealants significantly. Good dental hygiene did not improve sealants studied. Sealants placed on premolars had better evolution than those placed on molars. In conclusion, self-etching sealants are less effective than conventional sealants.