1. Evaluating the influence of ambient light on scanning trueness, precision, and time of intra oral scanner 
Toshio Arakida, Manabu Kanazawa, Maiko Iwaki, Tetsuya Suzuki, Shunsuke Minakuchi 
Journal of Prosthodontic Research 
Volume 62, Issue 3, Pages (July 2018)
DOI: /j.jpor
Copyright © 2017 Japan Prosthodontic Society Terms and Conditions

2. Fig. 1 The conversion filters.
The conversion filter for color temperature changes the color temperature of white LED light by intercepting specific light wavelengths. The figure shows the color temperature tones in the present study.
Journal of Prosthodontic Research  , DOI: ( /j.jpor )
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3. Fig. 2 The experimental device.
The light source was located 40cm away from the reference dentulous model, and the angle of incidence was set to 40°. The scanner wand is fixed and the scanning area is illuminated from two directions. Thus, the value of illuminance on the scanner wand remains at a constant value. To fix the scanner wand in a horizontal position on the dental arch, the anterior teeth of the reference model are removed.
Journal of Prosthodontic Research  , DOI: ( /j.jpor )
Copyright © 2017 Japan Prosthodontic Society Terms and Conditions

4. Fig. 3 The deviation analysis.
The color map on the right shows the mean deviation between the master data and the experimental data. The yellow to red area indicates a positive deviation from the master data. The blue area indicates a negative deviation from the master data. The green area indicates an exceedingly small deviation from the master data.
Journal of Prosthodontic Research  , DOI: ( /j.jpor )
Copyright © 2017 Japan Prosthodontic Society Terms and Conditions

5. Fig. 4
The correlation between color temperature and illuminance and mean deviation.
For trueness, the two-way ANOVA reveals a significant interaction between illuminance and color temperature and mean deviation (p<0.05). The post hoc multiple comparison revealed that color temperature and illuminance had a significant effect on trueness (p<0.05). ANOVA, analysis of variance.
Journal of Prosthodontic Research  , DOI: ( /j.jpor )
Copyright © 2017 Japan Prosthodontic Society Terms and Conditions

6. Fig. 5
The correlation between color temperature and illuminance and scanning time.
The two-way ANOVA reveals a significant interaction between illuminance and color temperature (p<0.05). The post hoc multiple comparison reveals that color temperature and illuminance have a significant effect on trueness (p<0.05). ANOVA, analysis of variance.
Journal of Prosthodontic Research  , DOI: ( /j.jpor )
Copyright © 2017 Japan Prosthodontic Society Terms and Conditions