目的：观察增加过氧化氢的浓度，及添加二氧化钛催化剂对诊室漂白系统 TION GC 疗效的影响。方法：牛前牙被浸泡于液体沸腾产生的红茶染色液中7 d，作为变色标本。用 TION 诊室漂白系统以每7天漂白3次的频率漂白该变色标本。对照组漂白剂为 TION 凝胶，实验组漂白剂分别为 TION 凝胶混合等体积的35％过氧化氢和 TION 凝胶混合二氧化钛。该过程每7天1次共重复4次。用色度计ShadeEye 检测标本颜色。测量结果转换成 CIE L×a×b×色彩模式，使用色彩分析软件，以ΔE×ab 值代表漂白前后的颜色差异。对第1次漂白之前和最后一次漂白之后的颜色变化进行了测量。使用单向方差分析和 Tukey 检验(P<0.01)对实验结果进行统计学分析。结果：第2，第3和第4次漂白前后色差值ΔE×ab的变化小于6.0，第1次漂白前后过氧化氢添加组和二氧化钛添加组大于6.0。结论：对于 TION 漂白系统，添加过氧化氢使得漂白效果得到少许提高，而添加二氧化钛漂白效果与实验组无明显差异。
Objective:We evalvated increases in the concentration of hydrogen per oxide and a titanium dioxide catalyst influenced the efficacy of the TION in Office bleaching system(TION, GC,). Bovine teeth were immersed for 7 days in a pigmentation liquid produced by boiling black tea, to discolor the specimens. Before bleaching treatment, the discolored specimens was measured using a colorimeter. Bleaching treatment was then done using the TION in office system. The color was measured again after the bleaching ,and for three more times. Thereafter, then every 7 days for three more times, in addition,the bleaching agent of the TION gel was mixed with an equal volume of 35% hydrogen peroxide, and bleaching was performed in the same way as for the controls (H2 O2-added group). Using an experimentally produced reactor in which the volume of the titanium dioxide V-CAT contained in the reactor was doubled, bleaching was performed using the mixed gel of TION in the same way as for the contro
