Manabe Atsufumi, Kato Yukiyo, Finger Werner J, Kanehira Masafumi, Komatsu Masashi
Department of Clinical Cariology and Endodontology, Showa University, School of Dentistry 2-1-1 Kitasenzoku, Ohta-Ward, Tokyo 145-8515, Japan.
Dent Mater J. 2009 May;28(3):338-43. doi: 10.4012/dmj.28.338.
The purpose of this in vitro investigation was to study the effects of coffee and tea immersion on surface discoloration of one commercial temporary resin coating material, White Coat (WHC; Kuraray Medical Inc., Tokyo, Japan), and an experimental one, SI-R20209 (SIR; Shofu Inc., Kyoto, Japan). Disk-shaped specimens were prepared, their colors were determined at baseline, and after immersion in water (control), tea and coffee solutions for 24, 48, and 72 hours. Very little discoloration was found with the water-stored specimens. Staining response was most pronounced after coffee immersion for White Coat and after tea immersion for the experimental material, exceeding the clinically acceptable discoloration threshold value of deltaE=3.3. However, most of the resin shades tested are likely to be sufficiently safe against heavy discoloration when used for short-term restoration only.
本体外研究的目的是研究咖啡和茶浸泡对一种商用临时树脂涂层材料White Coat（WHC；可乐丽医疗株式会社，东京，日本）和一种实验性材料SI-R20209（SIR；松风株式会社，京都，日本）表面变色的影响。制备了圆盘形试样，在基线时测定其颜色，然后将其浸泡在水（对照）、茶和咖啡溶液中24、48和72小时。储水试样几乎没有变色。White Coat在咖啡浸泡后以及实验材料在茶浸泡后的染色反应最为明显，超过了临床可接受的变色阈值ΔE = 3.3。然而，测试的大多数树脂色号仅用于短期修复时，可能足以安全地防止严重变色。
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