Effect of Field of View and Voxel Size on CBCT-Based Accuracy of Dynamic Navigation in Endodontic Microsurgery: An In Vitro Study

Introduction: This study aimed to evaluate the influence of field of view (FOV) and voxel size on the accuracy of dynamic navigation (DN)-assisted endodontic microsurgery (EMS). Methods: Nine sets of maxillary and mandibular 3-dimensional-printed jaw models composed of 180 teeth were divided into 9 groups with different FOVs (80 X 80 mm, 60 X 60 mm, and 40 X 40 mm) and voxel sizes (0.3 mm, 0.16 mm, and 0.08 mm). The endodontic DN system was used to plan and execute the EMS. The accuracy of the DN-EMS was represented by the platform deviation, end deviation, angular deviation, resection angle, and resection length de-viation. Statistical analyses were performed using SPSS 24.0, and the significance level was set at P < .05. Results: The average platform deviation, end deviation, angular deviation, resection angle, and resection length deviation were 0.69 & PLUSMN; 0.31 mm, 0.93 & PLUSMN; 0.44 mm, 3.47 & PLUSMN; 1.80 & DEG;, 2.35 & PLUSMN; 1.76 & DEG;, and 0.41 & PLUSMN; 0.29 mm, respectively. No statistically significant differences in accuracy were observed between the nine FOV and voxel size groups. Conclusions: FOV and voxel size did not appear to play an important role in the accuracy of DN-EMS. Considering the image quality and radiation dose, it is reasonable to select a limited FOV (such as 40 X 40 mm and 60 X 60 mm) to cover only the registration device, involved teeth, and periapical lesion. The voxel size should be selected according to the required resolution and cone-beam computed tomography units. (J Endod 2023;49:1012-1019.)