Antibacterial effectiveness of peracetic acid and conventional endodontic irrigants

• Autor(a) principal: Guerreiro-Tanomaru,Juliane Maria
• Data de Publicação: 2011
• Outros Autores: Morgental,Renata Dornelles, Faria-Junior,Norberto Batista, Berbert,Fábio Luis Camargo Vilela, Tanomaru-filho,Mário
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Dental Journal
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402011000400004
• topic: sodium hypochlorite; chlorhexidine; peracetic acid; root canal irrigants; Endodontics

This study evaluated the in vitro antibacterial activity of conventional and experimental endodontic irrigants against Enterococcus faecalis. The following substances were evaluated by direct contact test: 2.5% sodium hypochlorite (NaOCl); 2% chlorhexidine (CHX); 1% peracetic acid. After different contact periods (30 s, 1, 3, and 10 min), a neutralizing agent was applied. Serial 10-fold dilutions were prepared and plated onto tryptic soy agar (TSA) and the number of colony-forming units per milliliter (CFU/mL) was determined. Sterile saline was used as a negative control. Both 2.5% NaOCl and 2% CHX eliminated E. faecalis after 30 s of contact. Peracetic acid reduced the bacterial counts by 86% after 3 min and completely eliminated E. faecalis after 10 min. These results allow us to conclude that 1% peracetic acid is effective against E. faecalis, despite its slower action compared with 2.5% NaOCl and 2% CHX.