Efficacy of intracanal barrier against microbial infiltration in teeth prepared for intraradicular post

Adalberto Ramos VIEIRA, Rodrigo Rodrigues AMARAL, Rafaela Reis DA-SILVA, Daniel Guião FERNANDES, Maria Isabel de Oliveira e Brito VILLALOBOS, Maria Eugênia ALVAREZ-LEITE, Frank Ferreira SILVEIRA, Maria Lima de Souza CÔRTES, Eduardo NUNES

Introduction: Intraradicular posts are recommended to improve the retention of artificial crowns and to distribute intraoral forces along the root. If the space created by partially removing the obturation is not adequately filled, it can lead to a massive infiltration of microorganisms from the oral cavity. Aim: The aim of this study was to assess the influence on bacterial infiltration of an intracanal barrier placed directly over the remaining root canal filling following post space preparation. Material and Methods: Seventy-two human single-rooted teeth were instrumented, filled, and then randomly divided into three experimental groups and two control groups. Group 1 received no additional treatment after filling and post space preparation, whereas Groups 2 and 3 received a barrier composed of temporary sealing material 1.0- and 2.0-mm thick, respectively. A culture of Enterococcus faecalis was inoculated into the spaces prepared to receive the intraradicular post, every three days over a 60-day period. Infiltration was evaluated daily by observing the turbidity of the culture medium. Results and Conclusion: Bacterial infiltration was found in all three experimental groups, but was significantly greater and occurred more quickly in G1 (p < 0.05), compared with G2 and G3. Infiltration was observed in all positive controls, whereas no infiltration was found in the negative controls. No significant difference (p > 0.05) was found between G2 and G3, regarding the rate and time frame of infiltration. It can be concluded that the barrier reduced the incidence of infiltration, and delayed the time of occurrence.

Keywords: : Dental Pins. Endodontics. Enterococcus faecalis.

How to cite: Vieira AR, Amaral RR, da-Silva RR, Fernandes DG, Villalobos MIOB, Alvarez-Leite ME, Silveira FF, Côrtes MIS, Nunes E. Efficacy of intracanal barrier against microbial infiltration in teeth prepared for intraradicular post. Dental Press Endod. 2020 Sept-Dec;10(3):36-42.

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