Nada A. Hashad, Ahmed H. Labib, Neeven A. Shaheen and Marwa M. Ezzat
Aim: The aim of this study was to clinically evaluate the antibacterial efficacy of two materials used as intracanal medications (chlorohexidine, propolis) in secondary infection cases.
Materials and methods: Thirty-two patients with single-rooted, single-canal teeth associated with secondary infection were randomly assigned into two groups according to the type of intracanal medication used. Group 1 (CHX gel intracanal medication), Group 2 (Propolis gel intracanal medication). The first microbial sample (S1) was obtained following complete aseptic removal of the primary filling material then the second microbial sample (S2) was obtained following chemomechanical preparation with 2CHX irrigant solution. ProTaper Universal rotary system was used up to F4, or F5 according to canal size for root canal reinstrumentation. Finally, the third microbial sample (S3) was collected after removal of the intracanal medication. After cultivating the three samples, the growing colonies were counted and recorded as colony forming units (CFU).
Results: The third microbial sample after intracanal medication recorded the lowest microbial count in all groups. There was statistically significant difference in microbial reduction of S3 to S2 in the tested groups. Comparing between groups regardless the samples, there was no statistically significant differences between the groups.
Conclusions: Both CHX and Propolis intracanal medication aid in microbial reduction, particularly in cases of secondary infection.