目的:评价不同牙根成熟水平的上中切牙脱水复水15min后颜色的变化。
方法:使用Cvek分类,60名参与者分为五组。一个分光光度计,配备了专门设计的夹具,用于颜色测量。隔离之后,颜色测量在基线的脱水过程间隔进行,1st,2nd,3rd,5th,Seven,第十,第15分钟。漱口后,在再水化过程中,以相同的时间间隔重复测量。获得CIED2000(ΔE00)值和白度指数(WID)以比较初始读数和每个间隔之间的颜色变化。弗里德曼和重复测量方差分析用于比较脱水和补液期间的时间类别,以及方差分析和Kruskal-Wallis检验,以比较每个时间的类别(p<0.05)。
结果:在所有Cvek类的脱水和再水化期间,平均ΔE00值出现显著差异(p<0.05)。虽然在补液期间不同分钟的班级之间没有观察到统计学上的显着差异(p>0.05),特别注意到,在脱水的第2分钟,第2、3和5类的平均ΔE00值在统计学上显著高于第1类的平均值(p<0.05)。然而,在评估脱水和复水过程的开始和结束测量时,以及ΔE00和ΔWID的总体变化,在不同类别中没有检测到显著的差异(p>0.05)。
结论:在刚刚萌出并仍在进行根部发育的牙齿中,脱水在最初的几分钟导致明显的颜色变化。然而,在脱水和再水化过程之后,发现牙齿的ΔE00和ΔWID的变化相似。
结论:根据Cvek分类,1类牙齿在脱水的前2分钟内颜色变化较低,并且对于顶端开放的未成熟牙齿,需要15分钟以上的补液才能在脱水15分钟后恢复到初始状态,这对于临床医生来说是至关重要的颜色评估时机.
OBJECTIVE: It is aimed to evaluate the color changes of upper central incisor teeth with different root maturation levels after 15 min of dehydration and rehydration.
METHODS: Using the Cvek classification, 60 participants were divided into five groups. A spectrophotometer, equipped with a specially designed jig, was utilized for color measurements. Following isolation, color measurements were conducted at the dehydration process intervals of baseline, 1st, 2nd, 3rd, 5th, 7th, 10th, and 15th minutes. After mouth rinsing, measurements were repeated at the same time intervals during the rehydration process. CIEDE2000 (ΔE00) values and the Whiteness Index (WID) were obtained to compare the color changes between the initial readings and each interval. Friedman and Repeated Measures ANOVA were applied to compare classes by time during the dehydration and rehydration periods, as well as ANOVA and Kruskal-Wallis tests to compare by classes for each time (p < 0.05).
RESULTS: Significant differences emerged in the mean ΔE00 values during dehydration and rehydration periods across all Cvek Classes (p < 0.05). While no statistically significant differences were observed among Classes at different minutes during the rehydration period (p > 0.05), it was particularly noted that the mean ΔE00 values of Classes 2, 3, and 5 at the 2nd minute of dehydration were statistically significantly higher than the mean of Class 1 (p < 0.05). However, when evaluating the starting and ending measurements of both dehydration and rehydration processes, and the overall change in ΔE00 and ΔWID, no significant variations were detected across the Classes (p > 0.05).
CONCLUSIONS: In teeth that have just erupted and are still undergoing root development, dehydration in the initial minutes results in noticeable color changes. However, the change in ΔE00 and ΔWID of the teeth was found to be similar after the dehydration and rehydration processes.
CONCLUSIONS: According to the Cvek classification, the lower color change in Class 1 teeth within the first 2 min of dehydration and the need for more than 15 min of rehydration for immature teeth with an open apex to return to their initial state after a 15-min dehydration are crucial for clinicians in terms of color assessment timing.