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BACKGROUND Microorganisms and their by-products in pulpal and periapical diseases are to be considered as the primary etiological agents of the pulpal necrosis and apical periodontitis. Enterococcus faecalis, which is the most common organism isolated from failed root canals, is a Gram-positive facultative anaerobe. Yeasts can be detected in 7-18% of(More)
BACKGROUND The smear layer has the capability to protect the bacteria within the dentinal tubules from intracanal medicament. After removal of the smear layer from infected root canals, it allows disinfection of the entire root canal. The smear layer compromising the seal between the root canal sealer and root canal wall also decreases the penetration of(More)
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