Quick Search:

uzh logo
Browse by:

Zurich Open Repository and Archive

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-27117

Paqué, F; Laib, A; Gautschi, H; Zehnder, M (2009). Hard-tissue debris accumulation analysis by high-resolution computed tomography scans. Journal of Endodontics, 35(7):1044-1047.

Accepted Version
View at publisher


INTRODUCTION: Hard-tissue debris accumulation is a potential side effect of root canal instrumentation that has not been systematically investigated. In the current communication, a method to assess this debris using high-resolution microcomputed tomography (microCT) is presented. METHODS: Based on prescans, mandibular molars with joining mesial root canals and isthmuses between these were selected (n = 6). The mean volume filled with apparent hard-tissue debris after instrumentation without irrigation was calculated over 2 mm of the mesial canal system by multiplying the voxel volume with the number of voxels representing acquired radiopaque material. Backscattered electron imaging was used to compare the calcium-phosphorus content of this material with that of the root dentin in the same specimen. RESULTS: Backscatter scans showed that the accumulated debris viewed in the microCT scans was consistent with root dentin. In the selected canal segments, 29.2% +/- 14.5% of the original canal volume was filled with accumulated debris, which represented a significant change from the preoperative scan (p < 0.01, one-sample t test against zero). Three-dimensional reconstructions of the microCT images visualized the accumulated hard-tissue debris in the whole canal system. CONCLUSIONS: The current method appears suitable to quantitatively compare different instrumenting/irrigating regimens on dentin debris accumulation.


52 citations in Web of Science®
58 citations in Scopus®
Google Scholar™



181 downloads since deposited on 01 Feb 2010
26 downloads since 12 months

Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Preventive Dentistry, Periodontology and Cariology
Dewey Decimal Classification:610 Medicine & health
Date:July 2009
Deposited On:01 Feb 2010 15:35
Last Modified:05 Apr 2016 13:44
Publisher DOI:10.1016/j.joen.2009.04.026
PubMed ID:19567331

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page