AIM: To compare the bacterial reduction achieved with reciprocating and rotary systems during root canal preparation. METHODOLOGY: Sixty distobuccal root canals of maxillary molars were contaminated with Enterococcus faecalis broth culture. After an incubation period of 21 days, bacterial samples were collected and cultured on m-Enterococcus agar plates. The root canals were divided into five groups, according to the system used for instrumentation: WaveOne, Reciproc, ProTaper, Mtwo and manual instrumentation. The negative controls consisted of five uncontaminated root canals that were subjected to the same instrumentations as each of the experimental groups. Bacterial samples were collected immediately and 7 days after instrumentation. Statistical analysis was performed by paired t-tests and anova tests. RESULTS: Compared with the samples before instrumentation, the bacterial count was significantly reduced after instrumentation in all groups, with no significant difference in bacterial count reduction amongst the reciprocating, rotary and manual techniques. However, the samples tested 7 days after instrumentation showed significantly higher bacterial counts than the samples tested immediately after instrumentation. CONCLUSIONS: All systems tested reduced bacterial counts to a similar level.
AIM: To compare the bacterial reduction achieved with reciprocating and rotary systems during root canal preparation. METHODOLOGY: Sixty distobuccal root canals of maxillary molars were contaminated with Enterococcus faecalis broth culture. After an incubation period of 21 days, bacterial samples were collected and cultured on m-Enterococcus agar plates. The root canals were divided into five groups, according to the system used for instrumentation: WaveOne, Reciproc, ProTaper, Mtwo and manual instrumentation. The negative controls consisted of five uncontaminated root canals that were subjected to the same instrumentations as each of the experimental groups. Bacterial samples were collected immediately and 7 days after instrumentation. Statistical analysis was performed by paired t-tests and anova tests. RESULTS: Compared with the samples before instrumentation, the bacterial count was significantly reduced after instrumentation in all groups, with no significant difference in bacterial count reduction amongst the reciprocating, rotary and manual techniques. However, the samples tested 7 days after instrumentation showed significantly higher bacterial counts than the samples tested immediately after instrumentation. CONCLUSIONS: All systems tested reduced bacterial counts to a similar level.
Authors: Frederico C Martinho; Lilian F Freitas; Gustavo G Nascimento; Aleteia M Fernandes; Fabio R M Leite; Ana P M Gomes; Izabel C G Camões Journal: Clin Oral Investig Date: 2014-11-21 Impact factor: 3.573
Authors: Bruna Paloma DE Oliveira; Carlos Menezes Aguiar; Andréa Cruz Câmara; Miracy Muniz DE Albuquerque; Ana Cristina Regis DE Barros Correia; Monica Felts DE LA Roca Soares Journal: Acta Stomatol Croat Date: 2015-12
Authors: Sergio Luiz Pinheiro; Caio Cesar da Silva; Lucas Augusto da Silva; Marina P Cicotti; Carlos Eduardo da Silveira Bueno; Carlos Eduardo Fontana; Letícia R Pagrion; Natália P Dalmora; Thaís T Daque; Francisco Uf de Campos Journal: Eur J Dent Date: 2018 Jan-Mar