背景:这项研究旨在评估视野(FOV)和体素大小对动态导航(DN)辅助的牙髓显微手术(EMS)准确性的影响。
方法:将9组由180颗牙齿组成的上颌和下颌三维打印颌骨模型分为9组,具有不同的FOV(80×80mm,60×60mm,和40×40毫米)和体素尺寸(0.3毫米,0.16mm,和0.08毫米)。牙髓DN系统用于计划和执行EMS。DN-EMS的精度由平台偏差表示,终点偏差,角度偏差,切除角度,和切除长度偏差。使用SPSS24.0进行统计分析,显著性水平设定为P<0.05。
结果:平均平台偏差,终点偏差,角度偏差,切除角度,切除长度偏差为0.69±0.31mm,0.93±0.44mm,3.47±1.80°,2.35±1.76°,和0.41±0.29毫米,分别。在9个FOV和体素尺寸组之间没有观察到统计学上显著的准确性差异。
结论:FOV和体素大小似乎对DN-EMS的准确性没有重要作用。考虑到图像质量和辐射剂量,选择有限的FOV(例如40×40mm和60×60mm)仅覆盖配准设备是合理的,涉及牙齿,和根尖周病变。应根据所需的分辨率和锥形束计算机断层摄影单位来选择体素尺寸。
BACKGROUND: 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 × 80 mm, 60 × 60 mm, and 40 × 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 deviation. 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 ± 0.31 mm, 0.93 ± 0.44 mm, 3.47 ± 1.80°, 2.35 ± 1.76°, and 0.41 ± 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 × 40 mm and 60 × 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.