Colorimetric comparison of single layered dental composite with double layered dental composite

Article information

Restor Dent Endod. 2012;37(2):84-89

Publication date (electronic) : 2012 May 18

doi : https://doi.org/10.5395/rde.2012.37.2.84

Young-Sang Song, DDS, MSD , Ja-Hyun Kim, DDS, MSD , Bin-Na Lee, DDS, MSD , Ji-Hyun Jang, DDS, MSD , Hoon-Sang Chang, DDS, PhD , Yun-Chan Hwang, DDS, PhD , Won-Mann Oh, DDS, PhD , In-Nam Hwang, DDS, PhD

Department of Conservative Dentistry, Chonnam National University School of Dentistry and DSRI, Gwangju, Korea.

Correspondence to In-Nam Hwang, DDS, PhD. Professor, Department of Conservative Dentistry, Chonnam National University School of Dentistry. 77 Youngbong-ro, Buk-gu, Gwangju, Korea 500-757. TEL, +82-62-530-5819; FAX, +82-62-530-5629; hinso@jnu.ac.kr

Received 2011 December 30; Revised 2012 February 13; Accepted 2012 February 24.

Abstract

Objectives

This study analyzed the difference in color caused by different thickness in enamel layer of composite resins when applied with single and layering placement technique, and evaluated if the results agreed with the shade guide from the manufacturers to verify reliability of the color matching process of the manufacturers.

Materials and Methods

For single composite resin samples, 6 mm diameter and 4 mm thickness cylindrical samples were fabricated using Ceram-X mono (DENTSPLY DeTrey) and CIE L^*a^*b^* values were measured with spectrophotometer. Same process was done for layering composite resin samples, making 3 dentinal shade samples, 4 mm thickness, for each shade using Ceram-X duo (DENTSPLY DeTrey) and enamel shade resins were layered in 2 mm thickness and CIE L^*a^*b^* values were measured. These samples were ground to 0.2 mm thickness each time, and CIE L^*a^*b^* values were measured to 1 mm thickness of enamel shade resin.

Results

Color difference (ΔE^*) between single and layering composite resin was 1.37 minimum and 10.53 maximum when layering thicknesses were between 1 mm and 2 mm and 6 out of 10 same shade groups suggested by manufacturer showed remarkable color difference at any thickness (ΔE^* > 3.3).

Conclusion

When using Ceram-X mono and duo for composite resin restoration, following the manufacturer's instructions for choosing the shade is not appropriate, and more accurate information for Ceram-X duo is needed on the variation and expression of the shades depending on the thickness of the enamel.

Keywords: Colorimetric comparison; Composite resin; Resin shade; Spectrophotometer

Notes

No potential conflict of interest relevant to this article was reported.

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