Chinese Journal of Medical History / Zhong Hua Yi Shi Za Zhi

[This article belongs to Volume - 53, Issue - 05]

Abstract : This study aimed to compare the initial color and translucency of four adhesive systems, and evaluate their color stability after immersion in a tea solution. Four adhesive systems were examined: a two-step etch-and-rinse system (Single Bond 2); a two-step self-etch system (Clearfil SE Bond); and two universal adhesive systems (All Bond Universal and G-Premio Bond). Forty adhesive discs (n=10 per adhesive) were fabricated and their color coordinates (L*, a*, b*, c*, and h*) were quantified by a colorimeter. The samples were then immersed in a tea solution for four weeks, after which color measurements were repeated. The initial color coordinates, translucency parameters, and color changes post-immersion (ΔE00) were compared among the groups. ANOVA displayed significant differences in the baseline color coordinates and translucency among the adhesive systems (P<0.001). Single Bond 2 and All Bond Universal revealed significantly higher lightness and translucency than Clearfil SE Bond and G-Premio Bond adhesives (P<0.05). Immersion in the tea solution caused pronounced discoloration in all adhesives, with G-Premio Bond exhibiting significantly greater color alterations than the other groups (P<0.05). There are significant disparities in the color coordinates, translucency, and color stability among different adhesives. The G- Premio Bond (universal) demonstrated the lowest lightness and translucency and the greatest color changes, whereas Single Bond 2 (etch-and-rinse) and All Bond Universal (universal) manifested the best color characteristics. It appears that the adhesive brand might play a more pivotal role than its generational classification in determining the color characteristics of bonding agents.