Description of the root canal system of mandibular first premolars in a colombian population
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2013-07
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Abstract
The success of endodontic treatments depends largely on the
knowledge of the morphology of the root canal system, allowing
accurate location, for proper cleaning and disinfection for the subsequent three-dimensional obturation.
Various studies have indicated that mandibular first premolars
have a single canal with different anatomical variations. There
have been several methods for studying anatomy of root canal, such
as sectioning, conventional radiography, radiovisiography, diaphanization, computerized axial tomography and micro-computed
tomography (CT). Although micro-CT may offer a simple and
reproducible technique showing the finest details, we used the
method of diaphanization, a reliable technique that is easy to
perform.
The purpose of the present study was to examine the root canal
system of the mandibular first premolar in a group of Colombians
according to Vertucci’s classification reasons. All patients gave their consent to participate in this study.
This study was approved by the ethics committee from the University of Santo Tomás, Bogotá, Colombia.
To verify the patency of the canal, we used K-file # 10. Then,
the teeth were immersed in sodium hypochlorite 5.25% for 24 h to
remove the pulp tissue.
The diaphanization began with decalcification, at room temperature using 5% nitric acid for 4 h. After washing with water,
the samples were dehydrated with increasing concentrations of
ethanol. The teeth were completely dried with hot air and cleared
with methyl salicylate 99.9% for 30 min.
The pre-cleared specimens were then injected with Chinese
ink using syringe irrigation with a 27-gauge needle from the pulp
chamber, while negative suction was applied to the apical foramen.
The canal system was analyzed by a trained operator using an operating binocular microscope with 10X magnification, recording the
canal system configuration according to the classification of Vertucci as shown in Fig. 1, and anatomical variations of the root canal
system. No images were captured and no software was
used
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Atribución-NoComercial-CompartirIgual 2.5 Colombia