Xu Ming-Ming, Xu Tong-Kai, Liu Feng, Ren Shu-Xin, Feng Hai-Lan
The First Outpatient Dental Clinic, Peking University School and Hospital of Stomatology, Beijing 100034, China.
Zhonghua Kou Qiang Yi Xue Za Zhi. 2009 Jul;44(7):430-2.
To compare the shade matching accuracy between tabs of shade guide and tabs out of shade guide by prosthodontists.
Sixty-two graduate students who had 1 to 5 years clinical experience without color blindness were included in this study. Twenty-nine tabs from Vita 3D-Master shadeguide and 7 tabs out of Vita 3D-Master shade guide but from Vita Bleachedguide 3D-Master were taken as the targets of shade matching and observed under the standard light. Subjects' shade matching accuracy on tabs of shadeguide and tabs out of shadeguide was recorded. Frequency of right match was analyzed using Monte Carlo exact probability-test. Wilcoxin test was used to analyze the difference between each group on ranked data of value, chroma and hue.
The shade matching accuracy of tabs of shade guide [45.9% (199/434)] was significantly higher than that of tabs out of shade guide [9.0% (39/434)]. There was significant difference between the two kinds of tabs of ranked data of value [0.2 (0.1 - 0.3), 0.4 (0.4 - 0.5)] and chroma [0.2 (0.1 - 0.4), 0.5 (0.4 - 0.6), P < 0.01, but there was no significant difference in hue data [0.3 (0.1 - 0.4), 0.3 (0.1 - 0.4)].
The shade matching ability of prosthodontists on tabs out of shade guide is lower than that on tabs of shadeguide. To fulfill clinical need, more training is necessary.
比较口腔修复医生对比色板内色片和比色板外色片的比色准确性。
本研究纳入62名有1至5年临床经验且无色盲的研究生。选取Vita 3D-Master比色板中的29个色片以及Vita 3D-Master比色板之外但来自Vita Bleachedguide 3D-Master的7个色片作为比色对象，并在标准光线下进行观察。记录受试者对比色板内色片和比色板外色片的比色准确性。采用蒙特卡洛精确概率检验分析正确匹配的频率。使用Wilcoxin检验分析每组在明度、彩度和色调排序数据上的差异。
比色板内色片的比色准确性[45.9%（199/434）]显著高于比色板外色片的比色准确性[9.0%（39/434）]。两种色片在明度排序数据[0.2（0.1 - 0.3），0.4（0.4 - 0.5）]和彩度排序数据[0.2（0.1 - 0.4），0.5（0.4 - 0.6），P < 0.01]上存在显著差异，但在色调数据[0.3（0.1 - 0.4），0.3（0.1 - 0.4）]上无显著差异。
口腔修复医生对比色板外色片的比色能力低于对比色板内色片的比色能力。为满足临床需求，需要更多培训。
