RESUMO
PURPOSE: The purpose of this study was to compare the caries removal efficiency of polymer burs (Smartburs) and conventional carbide burs microbiologically. METHODS: Twenty-four patients participated, each presenting 2 active carious lesions on the occlusal surfaces of primary molars. Sample-taking and caries-removal were done in the following order: (1) first sample (from the carious dentin); (2) caries removal (with a Smartbur or carbide bur); and (3) second sample (from the caries-free dentin), respectively. The samples were processed in a laboratory and spread on various media. The colonies on the agar plates were counted, and then numbers of CFU/ml were calculated. RESULTS: There were no statistically significant differences between the numbers of CFU/ml in the carious dentin before preparation, comparing the Smartbur group and carbide bur group for all the media used (P>.05). There were statistically significant differences in the numbers of CFU/ml before and after preparation comparing both types of burs for all the media used (P<.05). There were no statistically significant differences in the reductions of the numbers of CFU/ml, comparing the 2 preparation instruments (P>.05). CONCLUSION: The polymer burs were found as effective as the conventional carbide burs microbiologically in caries removal.
Assuntos
Bactérias/isolamento & purificação , Cárie Dentária/terapia , Preparo da Cavidade Dentária/instrumentação , Materiais Dentários/química , Polímeros/química , Compostos de Tungstênio/química , Bactérias Aeróbias/isolamento & purificação , Bactérias Anaeróbias/isolamento & purificação , Criança , Pré-Escolar , Contagem de Colônia Microbiana , Corantes , Meios de Cultura , Cárie Dentária/microbiologia , Dentina/microbiologia , Desenho de Equipamento , Feminino , Humanos , Lactobacillus/isolamento & purificação , Masculino , Teste de Materiais , Dente Molar/microbiologia , Streptococcus mutans/isolamento & purificação , Dente Decíduo/microbiologiaRESUMO
The aim of this study was to classify children according to their oral hygiene behaviors at the elementary school, and to evaluate the effects of oral health behaviors on caries prevalence, and to calculate the number of carious teeth and the surface distribution of caries in school children during a 2-year follow-up period. Results shows that even in the presence of the acquisition of appropriate oral hygiene behavior during preschool period, dental professionals and educational system should supported oral health motivation in primary school.