[Influence of ambient light and adjacent tooth in anterior tooth color measurement].
OBJECTIVE
To investigate the influence of different intensity and directions of ambient light and adjacent tooth in anterior tooth color measurement by using colorimeter.


METHODS
Fiber lite MI-150 was used as ambient illuminant and it irradiated from three or twelve o'clock direction through 45 degrees angle above. The light magnitude 0, 50, 75, 100, 125, 150 W were applied in this experiment. The values of CIE L* a* b* were measured by Minolta Chroma meter CR-321 colorimeter on the center labial surface of ten extracted human maxillary central incisors with or without adjacent teeth, then those data were analyzed statistically by using SPSS 11.5.


RESULTS
Neither different intensities nor different directions of ambient light could influence the results of color measurement by using Minolta Chroma meter CR-321 colorimeter, so did the adjacent teeth whether those were exist or not.


CONCLUSIONS
There is no influence of ambient light and adjacent teeth in the color measurement of anterior teeth under this experiment condition, and Minolta Chroma meter CR-321 colorimeter can be used to measure the color directly aside the chair with light.
Wang
Si-qian
SQ
Department of Prosthodontics, Hospital of Stomatology, Wenzhou Medical College, Wenzhou, China.
Sean
S Lee
SL
Wu
Zhang
Z
Li
Yiming
Y
Ma
Jian-feng
JF
D003116:Color; D003124:Colorimetry; D006801:Humans; D007180:Incisor; D014070:Tooth