Abstract
Background: The persistence of disease in periapical tissues is most commonly associated with difficulties or mishaps which occur during or after initial endodontic treatment. Aims and Objective: To isolate and identify the organisms in root canal failed cases & its current antibiotic susceptibility pattern. Materials and Methods: study was conducted on 51 patients attending the OPD of dental Department Nalanda Medical College and Hospital, Patna. The results were analyzed using VITEK-2 automated analyser (Bio Merieux UK). Results: A total of 18 types of bacteria were isolated and among them 17.3% cases reported E- faecalis and another 15.2% cases reported E-cloacae complex. Pseudomonas aeruginosa accounted for 8.7% while 6.5% constituted of E-faecium, Escherichia coli etc. Conclusion: Enterococcus species was found in majority of cases indicates that it is the predominant bacteria responsible for endodontic failure.
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