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KMID : 1004520140300040289
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Journal of Dental Rehabilitation and Applied Science
2014 Volume.30 No. 4 p.289 ~ p.298
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A study of illumination of dental laboratories
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Lee Hyo-Jung
Choi Jong-In
Kim Sung-Sook
Dong Jin-Keun
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Abstract
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Purpose: This study was designed to investigate the present conditions of illumination techniques in dental laboratories in order to distinguish colors for esthetic dentistry.
Materials and Methods: A total of forty-eight local dental laboratories were selected for sampling a) luminous intensity and b) color temperature. We measured the luminous intensity and the color temperature on a center point of porcelain table with lux meter and color meter respectively. The measurements were performed twice, once on a clear day and on a cloudy day between 12 pm and 2 pm (day light and artificial illumination) and between 7 pm and 10 pm (artificial illumination only).
Results: The results obtained were as follows. 1. The average luminous intensity in dental laboratories lighting was 1871 lx, and 67% of dental laboratories had luminous intensity greater than 1600 lx, which was appropriate for operations related to colors, while 33% of dental laboratories had in sufficient lighting for appropriate luminous intensity. 2. The average color temperature in dental laboratories lighting was 6506 K, which was inappropriate for operations related to color. None of the dental laboratories had a color temperature range of 5000 - 5500 K, which is appropriate for operations related to colors. 3.
Between daytime and nighttime, also between clear day and cloudy day, the average luminous intensity and color emperature in dental laboratories were not significantly different.
Conclusion: Illumination in most dental laboratories selected in this study was inappropriate for operations related to color.
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KEYWORD
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illumination, dental laboratory, luminous intensity, color temperature
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