Department of Comprehensive Dentistry, College of Dentistry, Texas A&M University, Dallas, TX.
Department of Prosthodontics, School of Dentistry, University of Washington, Seattle, WA.
J Prosthodont. 2020 Oct;29(8):651-655. doi: 10.1111/jopr.13205. Epub 2020 Jun 20.
To compute the effect of ambient light illuminance settings on the mesh quality of the digital scans accomplished in a subject.
A subject was recruited. The maxillary dentition did not present any dental restoration. A prosthodontist recorded different complete-arch maxillary digital scans by using an IOS (TRIOS 3; 3Shape) under 4 different illuminance light conditions namely chair light at 10,000-lux illuminance (CL group), room light at 1000-lux illuminance (RL group), natural light at 500-lux illuminance (NL group), and no light at 0-lux luminosity (ZL group). Ten digital scans for each group were consecutively obtained. Mesh quality was examined using the iso2mesh MATLAB package. Shapiro-Wilk test revealed a nonnormally distributed data. Kruskal-Wallis one-way ANOVA, and pair-wise comparison were selected to evaluate the data (α = 0.05).
Significant differences in mesh quality values were measured among the groups (p < 0.001). Pair-wise comparisons revealed that significant difference was found across all pairs of lighting groups, except for the RL-NL comparison (p = 0.279). However, the CL condition obtained the highest mean values, followed by RL and NL groups, and the lowest mean values were obtained on the ZL lighting condition.
Chair light at 10,000-lux illuminance condition is recommended to maximize the quality mesh values of the IOS system tested (TRIOS 3; 3Shape).
计算环境光照照度设置对受试者数字化扫描网格质量的影响。
招募一名受试者。上颌牙列没有任何牙体修复。一名修复医生在 4 种不同光照条件下（分别为 10000 勒克斯照度的椅灯（CL 组）、1000 勒克斯照度的室灯（RL 组）、500 勒克斯照度的自然光（NL 组）和 0 勒克斯照度的无光照（ZL 组））使用 IOS（TRIOS 3；3Shape）记录了不同的全弓上颌数字化扫描。使用 iso2mesh MATLAB 包检查网格质量。Shapiro-Wilk 检验显示数据呈非正态分布。选择 Kruskal-Wallis 单向方差分析和两两比较来评估数据（α=0.05）。
组间网格质量值存在显著差异（p<0.001）。两两比较显示，除 RL-NL 比较外（p=0.279），所有光照组之间均存在显著差异。然而，CL 条件获得的平均数值最高，其次是 RL 和 NL 组，而 ZL 光照条件下获得的平均数值最低。
建议在 10000 勒克斯照度的椅灯条件下使用 IOS 系统（TRIOS 3；3Shape），以最大化其网格质量值。
