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KMID : 1004520150310040294
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Journal of Dental Rehabilitation and Applied Science
2015 Volume.31 No. 4 p.294 ~ p.300
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Color evaluation of low viscosity bulk-fill resin with composite resin capping layer
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윤종현:Yun Jong-Hyeon
정지혜:Jung Ji-Hye/장훈상:Chang Hoon-Sang
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Abstract
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Purpose: The purpose of this study was to measure the color of low viscosity bulk-fill resin with a capping layer and to compare it with the color of microhybrid composite resin.
Materials and Methods: A low viscosity bulk-fill resin (SDR) and microhybrid composite resin of shade A2 (A2) or A3 (A3) were fabricated to 4 mm thickness and light cured for 20 seconds. CIE L*a*b* values of the resin specimens were measured with a colorimeter. Then shade A2 and A3 microhybrid composite resin was capped over low viscosity bulk-fill resins in 2 mm thickness (SA2, SA3). The resin specimens were light cured for 20 seconds and the color was measured and analyzed (n = 10). Color differences (ΔE) between SA2 and A2, SA3 and A3 were also calculated.
Results: L* value was highest in SDR followed by SA2 and SA3. L* value of A2 and A3 was the lowest. a* value was lowest in SDR followed by SA2 and SA3, and A2 and A3 was the highest. b* value was lowest in SDR followed by A2 and SA2, and A3 and SA3 was the highest. ΔE between A2 and SA2 (ΔE = 3.4), and that between A3 and SA3 (ΔE = 3.1) was lower than the perceptible color difference threshold of ΔE = 3.7.
Conclusion: ΔE between low viscosity bulk-fill resin with a capping layer and microhybrid resin was lower than the perceptible color difference threshold.
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KEYWORD
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low viscosity bulk-fill resin, color, colorimeter
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