Int J Prosthodont. 2019 May/Jun;32(3):289-292. doi: 10.11607/ijp.6077.
To evaluate the precision and trueness of computerized optical impressions of maxillectomy defects.
Three different maxillectomy defect models based on the Aramany classification system were used. Reference digitization of the models was performed with an industrial computerized tomography scanner. Each model was scanned five times using an intraoral scanner (True Definition). With the use of 3D evaluation software, the 3D datasets were geometrically superimposed using a best-fit algorithm to evaluate precision and trueness. Statistical analysis was performed to determine differences between the scans.
There was a statistically significant difference in both precision and trueness between Aramany classes (P < .001).
Digitizing maxillectomy defect models with an intraoral scanner appears to be accurate and reliable.
评估上颌骨切除术缺陷的计算机光学印模的精度和准确性。
使用基于 Aramany 分类系统的三种不同的上颌骨切除术缺陷模型。使用工业计算机断层扫描 (CT) 扫描仪对模型进行参考数字化。使用口腔内扫描仪 (True Definition) 对每个模型进行五次扫描。使用 3D 评估软件，通过最佳拟合算法对 3D 数据集进行几何叠加，以评估精度和准确性。对扫描结果进行统计学分析，以确定 Aramany 分类之间的差异。
在精度和准确性方面，Aramany 分类之间存在统计学显著差异（P<0.001）。
使用口腔内扫描仪对上颌骨切除术缺陷模型进行数字化似乎是准确和可靠的。
