Uticaj streptokoka i laktobacila kao riziko faktor za nastanak karijesa nakon zaštita okluzalnih površina stalnih zuba

Abstract

<p>Streprococci and lactobacilli have very important role in tooth decay formation, as well as in defence mechanism of oral cavity, salivary flow rate and buffer capacity. For tooth decay prevention of occlusal surfaces we use sealants, most frequently composite resin and glass ionomer cements. The aim of this clinical study wich included 96 children ageing 5-7, was to determine level of streptococci, lactobacilli, saliwary flow rate, buffer capacity, dental caries, as well as changes of microorganisms after sealing (Helioseal F, Fuji VII). Sealants efficacy was evaluated by retention and appereance of secondary caries. The aim of experimental study was to determine possibilities of fluoride released by different materials after 1, 3, 5, 7, 10, 20 days. both materials have possibilities of fluoride release during this period, maximum in the first 48 hours. the dental caries appereance depends on streptococci (SM) and lactobacilli (L) level, and low buffer capacity is found in children with high levels of SM and L. After a year, significant differences of level of lactobacilli was noted (p=0.043), whiles there was no significant differences in the level of streptococci. Composite retention after 12 month was 78,3 percents, glass ionomer retention was 60 percents, while the secondary caries appearance was more frequent after usage of composite, and depend on streptococci and lactobacilli level. Considering the main risk faktor for dental caries, reduction of levels of streptococci and lactobacilli should be obtained through preventive profilactic measures, with individual caries risk assesment.</p>