Chuang Chun-Chao, Cheng Feng-Chou, Chen Mu-Hsiung, Lin Wei-Chun, Chiang Chun-Pin
Department of Medical Imaging and Radiological Sciences, Chung Shan Medical University, Taichung, Taiwan.
Department of Medical Imaging, Chung Shan Medical University Hospital, Taichung, Taiwan.
J Dent Sci. 2025 Jan;20(1):137-146. doi: 10.1016/j.jds.2024.09.016. Epub 2024 Sep 28.
BACKGROUND/PURPOSE: Different types of scanners are gradually used to produce digital dental casts in the current dental practice. This study tested the accuracy of the three desktop scanners and two intraoral scanners and evaluated whether the desktop scanners had higher precision than the intraoral scanners.
This study used the three desktop and two intraoral scanners to scan a standard dental cast 5 times. The 5 digital casts produced by the same scanner were compared each other to study the precision errors of each scanner. Moreover, 5 sets of the 5 digital casts produced by the 5 different scanners were compared each other to investigate the trueness errors among these 5 different scanners.
This study showed a significant difference in the precision error of produced digital casts made by the 5 different scanners ( < 0.0001). The two intraoral scanners had significantly higher precision errors of produced digital casts than the three desktop scanners. However, there were no significant differences in the precision errors among the three desktop scanners and between the two intraoral scanners. The results of the whole cast or particular tooth surface trueness analyses demonstrated that the trueness errors were concentrated at the molar regions of produced digital casts when comparisons were performed between the intraoral and desktop scanners.
We conclude that the desktop scanners can achieve a better precision than the intraoral scanners. When the intraoral scanner is used, the dentist should notice the possible model errors at the molar regions.
背景/目的：在当前牙科实践中，不同类型的扫描仪逐渐被用于制作数字化牙模。本研究测试了三款桌面扫描仪和两款口内扫描仪的准确性，并评估桌面扫描仪是否比口内扫描仪具有更高的精度。
本研究使用三款桌面扫描仪和两款口内扫描仪对一个标准牙模进行5次扫描。将同一扫描仪生成的5个数字化牙模相互比较，以研究各扫描仪的精度误差。此外，将5种不同扫描仪生成的5组数字化牙模相互比较，以研究这5种不同扫描仪之间的真实度误差。
本研究显示，5种不同扫描仪生成的数字化牙模的精度误差存在显著差异（<0.0001）。两款口内扫描仪生成的数字化牙模的精度误差显著高于三款桌面扫描仪。然而，三款桌面扫描仪之间以及两款口内扫描仪之间的精度误差没有显著差异。全牙模或特定牙面真实度分析的结果表明，在对口内扫描仪和桌面扫描仪进行比较时，生成的数字化牙模的真实度误差集中在磨牙区域。
我们得出结论，桌面扫描仪比口内扫描仪能实现更好的精度。当使用口内扫描仪时，牙医应注意磨牙区域可能存在的模型误差。
