Journal
JOURNAL OF ENDODONTICS
Volume 34, Issue 11, Pages 1337-1341Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.joen.2008.08.006
Keywords
C-shaped canal; dental anatomy; mandibular first premolar; microcomputed tomography
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Funding
- National Natural Science Foundation of China [30572042]
- Key Technologies R&D Programme of Hubei Province, China [2007AA302B06]
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The purpose of this study was to investigate the morphology of the radicular grooves and root canal cross-sections in mandibular first premolars that exhibit a C-shaped root. Eighty-six mandibular first premolars with C-shaped roots were scanned from the coronal to anatomical apex using mu CT80, The location, length, and depth of the radicular grooves were measured. The cross-sectional morphology of root canal systems was evaluated at 11 levels. Results were subject to the Kruskal-Wallis test. Of the 86 C-shaped roots, a total of 93 radicular grooves were noted. Most of the grooves (78.5%) were located on the mesiolingual surface of the root. The C-shaped canal could vary considerably in shape at different levels, and the incidence of two canals at the middle and apical was 21% and 80%, respectively. This study shows that radicular grooves may present relevant morphologic variations in the root canal system when the C-shaped root is present. (J Endod 2008;34:1337-1341)
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