Abstract
BackgroundSuccessful endodontic therapy requires prevention of bacterial leakage between the root canal filing and root-canal walls. Sealing quality of a root canal filling depends strongly on the sealing ability of the sealer used. The present study aimed to evaluate the bacterial leakage resistance of AH Plus sealer modified with silver nanoparticles.MethodsForty sound teeth were obturated using lateral compaction technique except for five teeth as the negative controls. After considering five teeth as the positive controls (filled without sealer), the remaining teeth were assigned to two groups (n = 15) in terms of the sealer used (AH Plus sealer and silver nanoparticle-modified AH Plus). Bacterial leakage was evaluated in saliva using the two-chamber technique in every 24 h. When all the samples in the test groups were contaminated, the study was terminated. The data were analyzed with log-rank statistical test.ResultsAll samples in both experimental groups were contaminated during the 3-months period of observation. There was no significant difference in contamination time between study groups (P > 0.05).ConclusionsSilver nanoparticles used in tested concentration did not improve the bacterial leakage resistance of AH Plus sealer.
Highlights
Successful endodontic therapy requires prevention of bacterial leakage between the root canal filing and root-canal walls
Thorough eradication of microorganisms from the root canal system is necessary to ensure treatment success; it appears that the bacteria persist in the root canal after root canal treatment [2]
Failure in eliminating bacteria from the root canal system during endodontic treatment has been considered an essential factor for periapical inflammation, destruction of periapical tissues, periapical lesions, and endodontic treatment failure [7]
Summary
Successful endodontic therapy requires prevention of bacterial leakage between the root canal filing and root-canal walls. The main aim of root canal treatment is to significantly eradicate the microorganisms, and to modify the conditions in the root canal. The main obturating material for root canals is gutta-percha, it cannot alone fill the entire root canal space and adhere to its walls. No material currently exists that can alone, or in combination with other materials, provide a thorough seal for the root canal space, and sub-micron spaces always remain between the root canal walls and the obturating materials. Sealers with antibacterial activity can help decreasing the residual bacteria and prevent the re-contamination of the root canal space with microorganisms after successful endodontic treatment [9]
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