J Korean Acad Conserv Dent.  2009 May;34(3):199-207. 10.5395/JKACD.2009.34.3.199.

Color difference of the dental composites measured by different color measuring instruments

• Park SJ
• Noh EY
• Cho HG
• Hwang YC
• Oh WM
• Hwang IN

• KMID: 2176145
• DOI: http://doi.org/10.5395/JKACD.2009.34.3.199

Abstract

The objective of this study was to evaluate the effect of color measuring instrument by measuring the color of dental composite resins. Nine shade light cured composite resin disks were prepared (diameter : 15 mm, thickness : 4 mm). CIE L*a*b* color scale of each disk was measured with 3 different types of spectrophotometer [MiniScan XE plus (Model 4000S, Hunter Lab, USA), CM-3500d (Minolta, Japan) and Specbos 2100 Miniature VIS Reflection spectrometer (Serial No: 319416, JETI Technishe VIS Instrumentic GmbH, Germany)]. Miniscan XE Plus and CM-3500d using identical measuring geometry with different size of viewing aperture. But Specbos 2100 using different measuring geometry. Within the limitation of this study, there were color difference (DeltaE*) from 2.4 to 7.8 between Miniscan XE Plus and CM-3500d, but L*, a*, b* values showed the high correlation. However, there were great color difference (DeltaE*) in the extent of about 20 between instruments with the different measuring geometry. Therefore, color scale measured by color measuring instrument should be used as a relative value rather than an absolute value in the field of dentistry.

Keyword

tooth color; resin color; colorimeter; spectrophotometer; color difference

MeSH Terms

Dentistry
Light
Pyridines
Thiazoles
Pyridines
Thiazoles

Figure

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  Figure 1 Diagram of the Duplex-Fiber bundle.

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  Figure 2 L* value change of the Z-250 according to the measuring instrument and condition.Miniscan: MiniScan XE Plus CD: Minolta CD-3500d spec-O/D: Specbos 2100 with original measuring tip under dark. spec-O/L: Specbos 2100 with original measuring tip under light. spec-H/L: Specbos 2100 with handmade measuring tip under light.

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  Figure 3 a* value change of the Z-250 according to the measuring instrument and condition.

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  Figure 4 b* value change of the Z-250 according to the measuring instrument and condition.

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