Staining ability of herbal tea preparations on a nano-filled composite restorative material

One hundred and twelve discs were prepared from FiltekTM Z350XT composite Samples were divided into Green Tea Moringa Tea, Hibiscus Tea, and Artificial Saliva (AS) groups and immersed in freshly prepared beverages for 15 minutes each day for 45 days. Digital Reflectance Spectrophotometer was utilized to record color change and reported as ∆E Baseline, ∆E at 30 days, and ∆E at 45 days. Mean difference was calculated at 30 days (Mean difference of ∆E at 30 days = ∆E at 30 days - ∆E at baseline) and 45 days (Mean difference of ∆E at 45 days = ∆E at 45 days - ∆E at baseline).

采用FiltekTM Z350XT复合树脂（FiltekTM Z350XT Composite）制备了112个圆盘试样，将试样分为绿茶组、辣木茶组、木槿花茶组与人工唾液（Artificial Saliva, AS）组，每日将各组试样浸没于新鲜配制的对应饮品中15分钟，持续45天。采用数字反射分光光度计（Digital Reflectance Spectrophotometer）记录试样的颜色变化，并以基线色差值（∆E Baseline）、30天色差值（∆E at 30 days）和45天色差值（∆E at 45 days）进行结果报告。分别计算30天和45天时的色差值差值：30天色差值差值=30天色差值-基线色差值，45天色差值差值=45天色差值-基线色差值。