Kanawati Ali, Richards Mark W
Department of Restorative Dentistry, West Virginia University School of Dentistry, Morgantown, WV, USA.
Gen Dent. 2009 Jul-Aug;57(4):323-7.
Electronic shade-matching instruments are available for clinical use; however, their accuracy has not been established. This study evaluated a new electronic method of clinical shade matching compared to the standard visual method. The Vita Easyshade system, an electronic method of shade matching, was used on 40 subjects to measure the central region of each patient's maxillary left central incisor (tooth No. 9). Two visual evaluators with predetermined visual shade matching abilities selected a shade from the same area of tooth No. 9 for all subjects. Student's t-test, using a 95% score confidence interval (CI), was used to compare the two methods. The Vita Easyshade system was accurate 85% of the time in this in vivo study; however, the instrument was predictably accurate only 68-91% of the time at the 95% CI.
电子比色仪已可用于临床；然而，其准确性尚未得到证实。本研究评估了一种新的临床比色电子方法，并与标准视觉方法进行比较。Vita Easyshade系统是一种电子比色方法，对40名受试者的上颌左侧中切牙（9号牙）中央区域进行测量。两名具有预先确定的视觉比色能力的视觉评估者从所有受试者的9号牙相同区域选择一个颜色。使用95%得分置信区间（CI）的学生t检验来比较这两种方法。在这项体内研究中，Vita Easyshade系统在85%的时间内是准确的；然而，在95%CI时，该仪器仅在68% - 91%的时间内可预测地准确。
