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Órgano Oficial de la Asociación Dental Mexicana

2017, Number 6

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Rev ADM 2017; 74 (6)

Diagnosis of C-shaped root canals in mandibular second molars through the «evidence of obtained angle». A pilot validation study

Astudillo-Ortiz E, Palacios A, Cáceres-Carpio J, Astudillo J

Language: Spanish
References: 18
Page: 293-297
PDF size: 291.15 Kb.


ABSTRACT

Background: The gold standard to diagnose second molars with C-shaped root canals prior to beginning an endodontic and restorative treatment is cone-beam tomography. Tomographic services are hard to access and have a low distribution in dental clinics this has led us to design an alternative technique in panoramic radiographs named «evidence of the obtained angle» (EAO). Objective: The aim of this study was to create a breakpoint and estimate its diagnostic accuracy through a pilot study; its results will be used in a future investigation of validation of diagnostic tests. Methods: The pilot study included 37 cone-beam computed tomographies (CBCT) of a database property of the authors, which included their respective panoramic reconstruction, to which the technique EAO was applied; its results were validated applying diagnostic tests. A total of 74 second mandibular molars were analyzed. Results: A prevalence of 39.19 second molars with C-shaped root canal was obtained (CI 95%: 27.39:50.99), of which 61.11% corresponded to female patients. The breakpoint retrieved was of 6.9 degrees, the sensitivity was of 89.66% (IC 95% 76.85: 100.00), specificity 93.33% (IC 95% 84.93:100.00), index of validity 91.89% (IC 95% 85.00:98.79) positive predictive value 89.66% (IC 95% 76.85:100.00) and negative predictive value 93.33% (IC 95% 84.93:100.00), index of Youden 0.83 (IC 95% 0.70:0.96), positive likelihood ratio 13.45 (IC 95% 4.48:40.41), negative likelihood ratio 0.11 (IC 95% 0.04: 0.32). Conclusions: The breakpoint 6.9 degrees of the technique EAO applied on panoramic radiographs is valid and effective for the diagnosis of C-shaped root canals in mandibular second molars; it could, therefore, be validated in studies of diagnostic tests in the future.


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