Guo Yongqing, Ma Yun, Wang Zien, Yu Hao
Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian, School and Hospital of Stomatology, College and University, Fujian Medical University, Fujian, China.
Institute of Stomatology, Fujian Medical University, Fujian, China.
BMC Oral Health. 2025 Jul 3;25(1):1088. doi: 10.1186/s12903-025-06446-9.
Ambient lighting conditions has been confirmed as a significant factor influencing scanning performance. However, research on the optimal levels of both illuminance and color temperature for the scanning accuracy and shade matching capability of intraoral scanners (IOSs) remains limited. This study aimed to evaluate the impact of illuminance and color temperature levels on the scanning accuracy and shade matching capability of IOSs.
Ten maxillary typodonts were prepared, each featuring a right central incisor replaced by shade tabs from Vita toothguide classical (VC) and Vita toothguide 3D-Master (VM) shade guides. The right lateral incisor and left second premolar of each typodont were prepared. A laboratory scanner (InEos X5, Dentsply Sirona) was utilized to digitize the typodonts, creating a reference standard tessellation language (STL) file. The typodonts were then scanned using two IOSs (Trios 4 wireless, 3Shape A/S; Primescan, Dentsply Sirona) under different illuminance levels (0, 500, 1000, and 2500 lx) and color temperatures (4100, 5500, and 6500 K) to generate experimental STL files. Then, the scanning accuracy (trueness and precision) and shade matching capability (accuracy and repeatability) were also calculated.
Illuminance significantly influenced the scanning accuracy of the IOSs tested, whereas color temperature significantly affected shade matching outcomes (P < 0.05). The best scanning trueness was observed for Trios 4 at 1000 lx, while Primescan showed the best scanning trueness and precision at 2500 lx. Regarding shade matching capability, Trios 4 achieved the highest accuracy and repeatability at 5500 K, while Primescan performed best at 4100 K in terms of accuracy and repeatability.
Ambient lighting conditions significantly influenced the performance of IOSs. Trios 4 demonstrated optimal outcomes at 1000 lx and 5500 K, whereas the highest accuracy was attained for Primescan at 2500 lx and 4100 K. This study highlights the importance of optimal ambient lighting conditions to enhance the performance of IOSs.
环境光照条件已被确认为影响扫描性能的一个重要因素。然而，关于口腔内扫描仪（IOS）的扫描精度和比色能力的最佳照度和色温水平的研究仍然有限。本研究旨在评估照度和色温水平对IOS扫描精度和比色能力的影响。
制备10个上颌牙模型，每个模型的右上中切牙用Vita经典比色板（VC）和Vita 3D-Master比色板（VM）的比色片替换。对每个牙模型的右上侧切牙和左上第二前磨牙进行制备。使用实验室扫描仪（InEos X5，登士柏西诺德）对牙模型进行数字化处理，创建参考标准镶嵌语言（STL）文件。然后，使用两台IOS（Trios 4无线，3Shape A/S；Primescan，登士柏西诺德）在不同照度水平（0、500、1000和2500勒克斯）和色温（4100、5500和6500开尔文）下对牙模型进行扫描，以生成实验性STL文件。然后，还计算了扫描精度（准确性和精密度）和比色能力（准确性和重复性）。
照度显著影响所测试IOS的扫描精度，而色温显著影响比色结果（P < 0.05）。Trios 4在1000勒克斯时观察到最佳扫描准确性，而Primescan在2500勒克斯时显示出最佳扫描准确性和精密度。关于比色能力，Trios 4在5500开尔文时实现了最高的准确性和重复性，而Primescan在4100开尔文时在准确性和重复性方面表现最佳。
环境光照条件显著影响IOS的性能。Trios 4在1000勒克斯和5500开尔文时表现出最佳结果，而Primescan在2500勒克斯和4100开尔文时获得最高准确性。本研究强调了最佳环境光照条件对提高IOS性能的重要性。
