Molecular Microbiological Evaluation of Passive Ultrasonic Activation as a Supplementary Disinfecting Step: A Clinical Study

Infection Control in Retreatment Cases: In Vivo Antibacterial Effects of 2 Instrumentation Systems

“…In the present study, PUI led to a mean percent reduction of 30.6% when compared with samples taken immediately after chemomechanical preparation. This reduction in bacterial counts was not statistically significant and is in consonance with other studies (25)(26)(27). PUI is expected to enhance bacterial elimination in recesses of oval and flattened canals, ramifications, or areas of isthmus.…”

“…However, the sampling method with paper points only provides information about the bacteriologic conditions of the main root canal. Thus, our findings along with others (25)(26)(27) allow us to conclude that PUI does not significantly improve disinfection of the main canal. The in vivo effects of PUI in other areas of the root canal system require further investigation in a modified experimental protocol.…”

“…Data from ex vivo and in vivo studies evaluating the antibacterial effectiveness of PUI with NaOCl as a supplementary step have been inconclusive. Some authors reported superiority of the PUI approach over syringe irrigation (23,24), whereas others showed no significant differences (25)(26)(27). To the best of our knowledge, no study has evaluated the in vivo effects of PUI in retreatment cases.…”

Quaternary ammonium compounds in dental restorative materials

“…Furthermore, root canal instruments and flushing fluid are difficult to reach these areas. Therefore, it is impossible to remove the root canal infection completely [82][83][84][85] and residual bacteria becomes a main risk factor for pulpal infection and periradicular lesion 86) . In conclusion, it is very important to use root canal filling materials which have the antibacterial and anti-biofilm characteristics, so as to eliminate the residual bacteria and prevent the infection of the root canal.…”

Comparative antimicrobial efficacy of herbal alternatives ( Emblica officinalis , Psidium guajava ), MTAD, and 2.5% sodium hypochlorite against Enterococcus faecalis : An in vitro study

“…2,3 Sodium hypochlorite (NaOCl) is the most commonly used endodontic irrigant because of its antimicrobial potential 4 and its ability to dissolve organic matter. 5 However, it is not only irritant to the vital periradicular tissues, but also inherently possesses certain disadvantages such as inability to remove the smear layer, unpleasant taste, high toxicity, 6 corrosive to instruments, reduction in elastic modulus, and flexural strength of dentin.…”