Quantification of Streptococcus mutans in Different Types of Ligature Wires and Elastomeric Chains

Autor(es)

Mariana Umekita Shirozaki ^[1] ; José Tarcísio Lima Ferreira ^[2] ; Erika Calvano Küchler ^[3] ; Mírian Aiko Nakane Matsumoto ^[4] ; Carolina Patrícia Aires ^[5] ; Paulo Nelson-Filho ^[6] ; Fábio Lourenço Romano ^[7]

Afiliação do(s) autor(es)

^[1] Universidade de São Paulo Ribeirão Preto - Brasil

^[2] Universidade de São Paulo Ribeirão Preto - Brasil

^[3] Universidade de São Paulo Ribeirão Preto - Brasil

^[4] Universidade de São Paulo Ribeirão Preto - Brasil

^[5] University of São Paulo - Brasil

^[6] Universidade de São Paulo Ribeirão Preto - Brasil

^[7] Universidade de São Paulo Ribeirão Preto - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Dental Journal; v. 28, n. 4, p. 498-503, 2017-08-00.

Resumo

Abstract This study aimed to test the hypothesis that Streptococcus mutans contamination levels differ according to the type of the orthodontic ligature. Thirteen patients were selected. Each quadrant was randomly subjected to one of the following ligature-use protocols: I) elastomeric chain, II) steel ligature crossed over the archwire, III) steel ligature crossed under the archwire, and IV) steel ligature in a figure-eight pattern under the archwire. After seven days, the devices were removed and the Streptococcus mutans colony-forming unit count per mg of biofilm weight was determined. Twelve specimens (n=3) were also processed for scanning electron microscopy analysis. ANOVA and Tukey-Kramer test were used for comparisons to assess S. mutans differences between groups at a 5% significance level. There was no statistical difference in detectable levels of S. mutans among the groups (p=0.294). Scanning electron microscopy results showed abundant biofilms and microbial contamination in all groups. In conclusion, S. mutans contamination levels are similar in the different orthodontic ligatures. (AU)

• Processo FAPESP: 13/02536-5 - Quantificação de estreptococos do grupo mutans em diferentes tipos de amarrilhos conjugados e elástico em cadeia: estudo in vivo
• Beneficiário: Fábio Lourenço Romano
• Modalidade de apoio: Auxílio à Pesquisa - Regular