Journal
JOURNAL OF ENDODONTICS
Volume 35, Issue 9, Pages 1303-1309Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.joen.2009.05.035
Keywords
Apical periodontitis; biofilm; endodontic failure; endodontic retreatment; ultrastructural
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A light and electron microscope examination of the resected root tip of a failing endodontically re-treated lower molar was examined. The tooth had been initially treated 10 years ago and then re-treated 2 years ago. The resected root tip was sectioned axially, and thin sections were examined through the entire length of the specimen. Thin sections were examined with a transmission electron microscope. The thin sections were randomly chosen along the isthmus areas between the mesiobuccal and mesiolingual canals. our findings suggest that a complex, variable, multispecies biofilm was present the entire length of the specimen. (J Endod 2009,35:1303-1309)
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