Influence of Aging and 2-hydroxyethyl-methacrylate Content on the Color Stability of Experimental 2-hydroxyethyl-methacrylate-added Dental Glass Ionomers

J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (4): 379-384.

• Regular Papers • Previous Articles

Influence of Aging and 2-hydroxyethyl-methacrylate Content on the Color Stability of Experimental 2-hydroxyethyl-methacrylate-added Dental Glass Ionomers

Bin Yu, Guangfeng Zhao, Honam Lim, Jinik Lim Yongkeun Lee

1) Department of Dental Materials and Center for Dental Materials, School of Dentistry, Kyung Hee University, Seoul, Korea
2) Denforus co., Seaul, Korea

Received:2009-05-25 Revised:2008-09-21 Online:2010-04-30 Published:2010-04-28
Contact: Bin Yu
Supported by:
the Korea Science and Engineering Foundation (KOSEF) Science Research Center grant funded by the Korean Ministry of Education, Science and Technology (MEST) through Bone Metabolism Research Center (No. 0617-20080007)

Abstract

Abstract:

Color stability of dental resin modified glass ionomer (RMGI) has been a challenge to dentistry; therefore, systematic changes in 2-hydroxyethyl methacrylate (HEMA) content were performed experimentally to find an idea to enhance the color stability. Changes in color ( ΔE_ab^*) and color coordinates (ΔL^*, Δa^* and Δb^*) of experimental 10-50 wt pct HEMA-added dental glass ionomers (HAGIs) and corresponding RMGIs were determined after 5000 cycles of thermocycling. Color changes of HAGIs were not influenced by the HEMA content while ΔL^*, Δa^* and Δb values were in°uenced by the HEMA content. Color stability of 30% or 40% HEMA-added HAGIs was not different from those of the commercial RMGIs. Since the in°uence of HEMA itself on the color stability of HAGIs was limited, compositional modi¯cation to increase the color stability of these materials should be developed.

Key words: Glass ionomer, HEMA, color coordinate, thermocycling

Bin Yu, Guangfeng Zhao, Honam Lim, Jinik Lim, Yongkeun Lee. Influence of Aging and 2-hydroxyethyl-methacrylate Content on the Color Stability of Experimental 2-hydroxyethyl-methacrylate-added Dental Glass Ionomers[J]. J Mater Sci Technol, 2010, 26(4): 379-384.

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Influence of Aging and 2-hydroxyethyl-methacrylate Content on the Color Stability of Experimental 2-hydroxyethyl-methacrylate-added Dental Glass Ionomers

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