ArticleImaging science in dentistry2026
Comparison between dual-angle periapical technique and cone-beam computed tomography in the identification of a second canal in mandibular incisors in the presence of a zirconia implant: An in vitro study.
Article in Imaging science in dentistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: To compare the accuracy of the dual-angle periapical technique (DPT) and CBCT acquired with two protocols in identifying lower incisors with a second canal adjacent to a zirconia implant. Materials and Methods: Twenty single-rooted lower incisors were used, twelve with one canal and eight with two canals, confirmed with micro-CT. These roots and a zirconia implant were positioned in the alveolus of the mandibular right and left central incisors of a dry human mandible, respectively. Periapical radiographs were obtained using a Focus X-ray unit and a photostimulated phosphor plate (VistaScan system) with parameters of 70 kVp, 7 mA, and 0.125 seconds of exposure time. For each root, one standard and one with the tube shifted distally in 30°, with and without implant, totaling 80 radiographs. In addition, 80 CBCT scans were obtained with the OP300 Maxio (FOV 5×5 cm, 90 kVp), with and without implants, for each root. The variable parameters were: low-resolution (LR) (5 mA, 0.2 mm voxel) and high-resolution (HR) (10 mA, 0.085 mm voxel). Five evaluators assessed all images using a 5-point confidence scale. Two-way ANOVA with Sidak's post hoc test was used ( Results: DPT and both CBCT protocols(LR and HR) showed comparable AUC, sensitivity, and specificity ( Conclusion: DPT and both CBCT protocols showed comparable diagnostic accuracy of the second canal regardless of zirconia implant presence.
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