Abstract
Introduction
Successful endodontic treatment is dependent on a perfect knowledge of normal root
canal anatomy and variations from the norm. This study was aimed to investigate the
root canal anatomy of mandibular first premolars by both radiography and cross-sectional
methods in an Iranian population.
Methods
Two hundred seventeen extracted human mandibular first premolars were used. Radiographs
were taken in both mesiodistal and buccolingual directions for each premolar. Then,
all the teeth were decoronated at the cementoenamel junction and resected perpendicular
to their long axes into three equal sections and stained with fuscin. Digital photographs
of the cross-sectional root surfaces were taken and surveyed at 40× magnification.
The root canal configuration types were determined separately by radiographs and cross-sectional
images for each premolar.
Results
Out of 217 teeth examined, 192 (88.47%) had a single root canal. The remaining 25
teeth (11.53%) showed two canals in at least one cross-section of their roots with
five root canal configurations. In the mesiodistal (MD) radiographs, only 5.99% of
premolars showed two canals with three root canal configurations.
Conclusions
One-hundred ninety two out of 217premolars showed one canal in both cross-section
and MD radiography. Only 7 premolars were diagnosed as having more than one canal
with the same canal configuration in both cross-sections and MD radiography methods.
Key Words
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Article info
Publication history
Published online: December 07, 2009
Footnotes
Supported by Tehran University of Medical Sciences & Health Services. Tehran, Iran.
Identification
Copyright
© 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
