Kehrwald Ricardo, Castro Hebert Sampaio de, Salmeron Samira, Matheus Ricardo Alves, Santaella Gustavo Machado, Queiroz Polyane Mazucatto
Department of Dentistry, Area of Implantology, Ingá Center University Maringa, Parana, Brazil.
Department of Oral Medicine, Division of Oral Radiology, State University of Londrina, Londrina, Parana, Brazil.
Eur J Dent. 2022 May;16(2):381-385. doi: 10.1055/s-0041-1736388. Epub 2021 Dec 13.
This study was developed to evaluate the influence of voxel size on bone measurements for implant planning.
The research was performed by using edentulous synthetic human mandibles with different levels of bone resorption. For each mandible, height and bone thickness were measured with a digital caliper. The PaX-i3d device was used to acquire the volumes of the five mandibles, with 50kVp, 4 mA, and a voxel size of 0.08 mm. After the acquisition, the images were reconstructed in the software CS three-dimensional Imaging, with four different sizes of voxels: 0.1, 0.2, 0.3, and 0.4 mm. All volumes were analyzed by a single evaluator who performed measurements to obtain bone height and thickness, using the reference points that were considered in obtaining the gold standard. The data were analyzed by ANOVA with a significance level of 5%.
There was no significant difference in the measurements obtained with different voxel sizes, both for bone height measurements and bone thickness. There was no statistically significant difference in measurements in thickness in comparison to the gold standard.
When necessary, to measure height and bone thickness, it is possible to recommend voxel images of larger size (0.40 mm) without compromising the quality of the patient's clinical planning.
开展本研究以评估体素大小对种植规划中骨测量的影响。
使用具有不同程度骨吸收的无牙合成人类下颌骨进行研究。对于每个下颌骨，用数字卡尺测量高度和骨厚度。使用PaX-i3d设备以50kVp、4mA和0.08mm的体素大小采集五个下颌骨的容积。采集后，在软件CS三维成像中重建图像，使用四种不同大小的体素：0.1、0.2、0.3和0.4mm。所有容积均由一名评估人员进行分析，该评估人员使用在获取金标准时所考虑的参考点进行测量以获得骨高度和厚度。数据采用方差分析进行分析，显著性水平为5%。
对于骨高度测量和骨厚度，不同体素大小所获得的测量结果均无显著差异。与金标准相比，厚度测量结果无统计学显著差异。
必要时，在测量高度和骨厚度时，可以推荐使用较大尺寸（0.40mm）的体素图像，而不会影响患者临床规划的质量。
