The aim of this study was to evaluate the influence of different settings of ambient light intensity inside the dental office on the accuracy (trueness and precision) of an intraoral scanner (IOS). A full crown preparation was conducted on a resin molar which was scanned using a high resolution extraoral scanner to obtain a reference model. Six light settings were chosen based on the most clinically relevant light conditions inside the workspace, and the preparation was scanned using an intraoral scanner (PlanScan, Planmeca). The obtained data was analyzed using a professional 3D quality control software (Geomagic Control X). There was no statistically relevant difference between the groups when regarding trueness, although a slight influence of the light intensity could be observed on the trueness values. Regarding precision, the best results were obtained in the 3800 lux group, with the other groups presenting close values, excepting the extreme values (400 lux and 11 000 lux) groups that proved to be the most deficient.

中文翻译：

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牙科办公室的照明强度条件会影响口内扫描的准确性吗？

本研究的目的是评估牙科诊所内环境光强度的不同设置对口腔内扫描仪 (IOS) 准确性（真实性和精确度）的影响。在树脂磨牙上进行全冠制备，使用高分辨率口外扫描仪对其进行扫描以获得参考模型。根据工作空间内与临床最相关的光线条件选择了六种光线设置，并使用口内扫描仪（PlanScan，Planmeca）扫描准备工作。使用专业的 3D 质量控制软件 (Geomagic Control X) 分析获得的数据。尽管可以观察到光强度对真实度值的轻微影响，但在真实度方面，两组之间没有统计学上的相关差异。关于精度，