Location and negotiability of second mesiobuccal canal in upper molar by tomographic and anatomical macroscopic analysis
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ORIGINAL ARTICLE
Location and negotiability of second mesiobuccal canal in upper molar by tomographic and anatomical macroscopic analysis Luiz Fernando Machado Silveira • Mariana Marroni Marques Roberta Katrein da Costa • Josue´ Martos • Alesandro Lorenzi
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Received: 21 January 2013 / Accepted: 4 March 2013 Ó Springer-Verlag France 2013
Abstract Purpose The aim of this study was to assess the presence and negotiability of second mesiobuccal (MB2) canal at pulp chamber, cervical, medium and apical levels comparing the findings obtained by anatomical evaluation with cone-beam computed tomography (CBCT) images. Methods 56 and 43 human maxillary first and second upper molars, respectively, were assessed. The specimens were placed on an acrylic platform in a stationary position to identify the presence of MB2 canal at the pulp chamber floor, cervical, medium, and apical level. The samples were analyzed using two image acquisition softwares (XoranCat and DentalSlice) and subsequently by macroscopic anatomical analysis with a 49 magnifying glass. All data were summarized, and mean values, frequencies, and percentage values were calculated for each group of specimens. Results DentalSlice and XoranCat images of first molars showed a rate concordance index (CI) of present MB2 canals in comparison to anatomic evaluations of 65.2 and 70.1 %, respectively. On the second molars, the rate of CI reached about 80 % in both sets of images. In the first molars, 29.9 % of canals localized by XoranCat images did not display anatomical negotiability; 34.8 % of canals localized by DentalSlice images did not display anatomical negotiability.
L. F. M. Silveira M. M. Marques R. K. da Costa J. Martos (&) Department of Semiology and Clinics, School of Dentistry, Federal University of Pelotas, Gonc¸alves Chaves st. 457-Centro, Pelotas, RS CEP 96015-560, Brazil e-mail: [email protected] A. Lorenzi Center of Maxillofacial Diagnosis ClinDoc, Argolo st. 1284, Pelotas, RS 96015-160, Brazil
Among second molars, 18.6 % of canals localized by XoranCat did not display anatomical negotiability; 19.8 % of canals localized by DentalSlice did not display anatomical negotiability. On the first molars with anatomical negotiability, errors not identified by XoranCat and DentalSlice reached rates of 22.3 and 25.4 %, respectively. Among second molars, error rates were 8.7 % (XoranCat) and 11.6 % (DentalSlice). Conclusion Our study indicated that (1) the tomographic image is an auxiliary way to detection and mapping of the MB2 canal in maxillary molars, (2) the tomographic image is ineffective in determining negotiability. Both image software packages used in this study showed similar results. Keywords Anatomy Cone-beam computed tomography Mesiobuccal canal Molar Root canal
Introduction The application of cone-beam computed tomography (CBCT) in endodontics has been useful in the diagnosis of periapical lesions, detection of root fractures, elucidation of internal or external tooth resorption, periradicular surgical planning, and visualiza
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