Color stability of the resin cements with accelerated aging

Ha-Jeung Song; Su-Jung Park; Yun-Chan Hwang; Won-Mann Oh; In-Nam Hwang

doi:10.5395/JKACD.2008.33.4.389

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Song, Park, Hwang, Oh, and Hwang: Color stability of the resin cements with accelerated aging

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2008; 33(4): 389-396.

Published online: 31 July 2008

DOI: https://doi.org/10.5395/JKACD.2008.33.4.389

Color stability of the resin cements with accelerated aging

Ha-Jeung Song, Su-Jung Park, Yun-Chan Hwang, Won-Mann Oh, In-Nam Hwang

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

Corresponding Author: In-Nam Hwang. Department of Conservative Dentistry, School of Dentistry, Chonnam National University, 5 Hak-dong, Dong-gu, Gwangju, 501-757, Korea. Tel: 82-62-220-4443, Fax: 82-62-225-8387, hinso@jnu.ac.kr

Received 24 April 2008 Revised 23 June 2008 Accepted 2 July 2008

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The purpose of this study was to evaluate the color stability of resin cements with accelerated test. Four dual curing resin cements: Panavia-F (KURARAY), Duolink (BISCO), Variolink-II (Ivoclar Vivadent), and RelyX Unicem (3M ESPE) and 1 self curing resin cement: Resiment CE (j. l. Blosser) were used in this study. In control group, Gradia Anterior (GC) composite resin and Tescera Dentin (Bisco) indirect composite were used. Ten disk shape specimens were made from each resin cement. The specimens were subjected to an accelerated aging process in a refrigerated bath circulator at 60℃ for 15 and 30 days. Spectrophotometric analyses were made before and after 15 days and 30 days of accelerated aging time.

The color characteristics (L^*, a^*, b^*) and the color difference (ΔE^*) of the specimens before and after immersion were measured and computed.

Regardless of type of the resin cements, L^* value was decreased and a^* value was increased, but there were no significant difference. But b^* value was increased significantly (p < 0.05). Tescera inlay showed least color change (p < 0.05), but Gradia showed notable color change after 15 days.

After 30 days on accelerated aging, ΔE^* value was increased (Panavia-F < Variolink-II < Resiment CE < Duolink < Unicem) (p < 0.05), but there were no significant difference among Panavia-F, Variolink-II, and Resiment CE groups. After 30 days of accelerated aging, ΔE^* value of all resin cements were greater than 3.0 and could be perceived by the human eye.

Keywords: Resin cement, Color stability, Accelerating test, Color change, CIE L^*a^*b^*, ΔE^* value

Figures and Tables

Figure 1

Change of L* Value after accelerating test.

Figure 2

Change of a* Value after accelerating test.

Figure 3

Change of b* value after accelerating test.

Figure 4

Total color difference (ΔE*). Bar means statistically significant difference between 15days and 30days (p < 0.05)

Table 1

Resin cement systems used in study

All informations were provided from manufacturers. Bis-GMA : bis-phenol-A-diglycidyl methacrylate, UDMA : urethane dimethacrylate, TEGDMA : triethyleneglycol dimethacrylate, MDP : methacryloyloxydecyl dihydrogen phosphate

Table 2

Results of color change of resin cements, direct composite resin and indirect composite resin before and after accelerating test

TE : Tescera Dentin, GR : Gradia, Standard deviations are in parentheses.

Table 3

Total color difference (ΔE*) of tested resin cement, direct composite, indirect composite after 15days and 30days

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