THE MARGINAL ADAPTATION OF LIGHT-CURED COMPOSITE MATERIAL TO TOOTH HARD TISSUES IN LABORATORY CONDITIONS

Abstract

Purpose of the study. The marginal adaptation of lightcured composite to tooth hard tissues depending on the initial level of structural and functional enamel acid resistance in laboratory conditions. Research methods. Of the patients under the clinical conditions, the initial structural and functional enamel acid resistance the was determined and direct restoration of light-cured composite in the tooth were to be removed was performed with different times of enamel acid etching. In the removed teeth the marginal adaptation by micropermeability at the light-cured composite along the restoration perimeter and by the paint penetration depth between material and cavity walls visually in points and by analysis digital image as a percentage was determined under laboratory conditions. Scientific novelty. The initial level of structural and functional enamel acid resistance affects the choice of time parameters of its acid etching before tooth direct restoration fore software the best light-cured material marginal adaptation to hard tissues in terms of micropermeability. Conclusions. Thus, the results of the light-cured material marginal adaptation to the hard tooth tissues of micropermeability, depending on the initial level of structural and functional enamel acid resistance laboratory study, showed the advantages of prolonging the time of acid exposure to enamel to 30 seconds in the case of determining in patients with high or medium enamel acid resistance, while in patients with low or very low structural and functional acid resistance, increasing the time of etching enamel is impractical.