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Analysis of the cause of failure in nonsurgical endodontic treatment by microscopic inspection during endodontic microsurgery.

 Minju Song  ;  Hyeon-Cheol Kim  ;  Euiseong Kim  ;  Woocheol Lee 
 Journal of Endodontics, Vol.37(11) : 1516-1519, 2011 
Journal Title
 Journal of Endodontics 
Issue Date
INTRODUCTION: This study examined the clinical causes of failure and the limitation of a previous endodontic treatment by an inspection of the root apex and resected root surface at 26× magnification during endodontic microsurgery. METHODS: The data were collected from patients in the Department of Conservative Dentistry at the Dental College, Yonsei University in Seoul, Korea between March 2001 and January 2011. All root-filled cases with symptomatic or asymptomatic apical periodontitis were enrolled in this study. All surgical procedures were performed by using an operating microscope. The surface of the apical root to be resected or the resected root surface after methylene blue staining was examined during the surgical procedure and recorded carefully with 26× magnification to determine the state of the previous endodontic treatment by using an operating microscope. RESULTS: Among the 557 cases with periapical surgery, 493 teeth were included in this study. With the exclusion of unknown cases, the most common possible cause of failure was perceived leakage around the canal filling material (30.4%), followed by a missing canal (19.7%), underfilling (14.2%), anatomical complexity (8.7%), overfilling (3.0%), iatrogenic problems (2.8%), apical calculus (1.8%), and cracks (1.2%). The frequency of possible failure causes differed according to the tooth position (P < .001). CONCLUSIONS: An appreciation of the root canal anatomy by using an operating microscope in nonsurgical endodontic treatment can make the prognosis more predictable and favorable.
Appears in Collections:
1. Journal Papers (연구논문) > 2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실)
Yonsei Authors
김의성(Kim, Eui Seong) ; 송민주(Song, Min Ju)
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