2007 Volume 50 Issue 4 Pages 486-492
The purpose of this study was to evaluate the chronological color changes of adhesive resins. Four kinds of two-step self-etch adhesive systems (Clearfil Mega Bond, Mac Bond II, UniFil Bond, Imperva Fluoro Bond) and four singleapplication self-etch adhesive systems (Adper Prompt L-Pop, Fluoro Bond Shake-One, One-up Bond F and One-up Bond F Plus) were used. These adhesive resins were placed in a Teflon mold (6mm in diameter, 2mm thickness) and light irradiated for 20 sec. After curing, the specimens were stored in 37℃ distilled water for 30 days, then subjected to thermal cycling. Color change was measured using a spectro photometer and evaluated by the CIE L*a*b*. Evaluations were performed before irradiation, after irradiation, and after storage in water for 1, 7, 30 days and after thermal cycling. The results were as follows: 1. After light irradiation, b^* values decreased and L* and a* values produced the lowest color changes. 2. For Mac Bond II, UniFil Bond and Adper Prompt L-Pop, L* values changed after storage in 37℃ distilled water. 3. For Adper Prompt L-Pop and One-up Bond F, a* values changed after storage in 37℃ distilled water. 4. For Clearfil Mega Bond and Adper Prompt L-Pop, b* values changed after storage in 37℃ distilled water.
