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In vivo assessment of accuracy of Propex II, Root ZX II, and radiographic measurements for location of the major foramen - Fernanda Garcia Tampelini, Marcelo Santos Coelho, Marcos de Azevêdo Rios, Carlos Eduardo Fontana, Daniel Guimarães Pedro Rocha, Sergio Luiz Pinheiro, Carlos Eduardo da Silveira Bueno
- Restor Dent Endod 2017;42(3):200-205. Published online May 16, 2017
- DOI: https://doi.org/10.5395/rde.2017.42.3.200
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Abstract
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ePub Objectives The aim of this
in vivo study was to assess the accuracy of 2 third-generation electronic apex locators (EALs), Propex II (Dentsply Maillefer) and Root ZX II (J. Morita), and radiographic technique for locating the major foramen (MF).Materials and Methods Thirty-two premolars with single canals that required extraction were included. Following anesthesia, access, and initial canal preparation with size 10 and 15 K-flex files and SX and S1 rotary ProTaper files, the canals were irrigated with 2.5% sodium hypochlorite. The length of the root canal was verified 3 times for each tooth using the 2 apex locators and once using the radiographic technique. Teeth were extracted and the actual WL was determined using size 15 K-files under a × 25 magnification. The Biostat 4.0 program (AnalystSoft Inc.) was used for comparing the direct measurements with those obtained using radiographic technique and the apex locators. Pearson's correlation analysis and analysis of variance (ANOVA) were used for statistical analyses.
Results The measurements obtained using the visual method exhibited the strongest correlation with Root ZX II (
r = 0.94), followed by Propex II (r = 0.90) and Ingle's technique (r = 0.81;p < 0.001). Descriptive statistics using ANOVA (Tukey'spost hoc test) revealed significant differences between the radiographic measurements and both EALs measurements (p < 0.05).Conclusions Both EALs presented similar accuracy that was higher than that of the radiographic measurements obtained with Ingle's technique. Our results suggest that the use of these EALs for MF location is more accurate than the use of radiographic measurements.
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Original Article
- A study on the C-shaped root canal system of mandibular second molar
- Dong-Gyun Lee, Jun-Mo Park, Ho-Keel Hwang
- J Korean Acad Conserv Dent 2007;32(4):335-342. Published online July 31, 2007
- DOI: https://doi.org/10.5395/JKACD.2007.32.4.335
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Abstract
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C-shaped canals are known to present a complex canal anatomy with numerous fins connecting individual canals, thus requiring supplementary effort to accomplish a successful root canal treatment. This study examined the frequency of the C-shaped mandibular second molars and interrelation between the clinical records and radiographs to recognize them treated in the Department of Conservative Dentistry of the Chosun University Dental Hospital during a six-year period (1998 - 2004). This study reviewed the clinical records of 227 patients who underwent root canal treatment of the mandibular second molars. After opening the chamber, those cases with C-shaped orifices in the pulpal floor were selected, and the C-shaped root canal types were classified according to Melton's criteria. Three experienced dentists evaluated the radiographs of the C-shaped mandibular second molar on a viewer using a magnifying glass in order to determine if the root apex was fused or separated, the distal root canal was either centered or mesial shifted in the distal root, and if there was bilateral symmetry in a panorama. In conclusion, there is a high frequency of C-shaped mandibular second molars in Koreans. Simultaneous interpretation of the root shape and distal root canal using the preoperative, working length and post-treatment radiographs is important for diagnosing a C-shaped mandibular second molar.
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