电脑比色仪与比色板比色间的相关性及其差异  

Comparison of visual and electronic tooth shade measurement

作　　者：陈宏[1] 黄建静[1] W Zhang S Lee 张秀华[1] J Kin 李一鸣[1] 

机构地区：[1]温州医学院附属第一医院口腔科,325000 [2]Loma Linda University

出　　处：《浙江医学》2009年第1期39-40,44,共3页Zhejiang Medical Journal

基　　金：温州市科技计划项目（H20070041）

摘　　要：目的分析电脑比色与视觉比色的相关性及其差异。方法采用ShadeVision牙比色仪和Vitapan Classical比色板分别对120例健康志愿者上颌前牙漂白前及漂白后10d、20d、3个月及6个月进行比色。ShadeVision牙比色仪分别对牙冠切1／3、中1／3、龈1／3进行比色，并与Vitapan Classical比色板比色结果相比较，统计两者间的异同比例，并采用Spearman秩相关检验进行统计分析。结果对整个牙冠比色的5个不同时期中，两种方法的相关系数分别为0.723、0．739、0.682、0.705、0.730；相关系数最高的是视觉比色与比色仪对整个牙冠和牙冠中1／3的比色，而最低的是视觉比色与比色仪对牙冠龈1／3的比色。比色结果一致的比例为19．6％～340％，≤2个色阶差别的比例为51．5％～71．0％，≤1个色阶差别的比例为410％～58．4％；漂白前两种方法存在4个色阶差的比例为20．3％，而漂白后仅为0．4％～0．8％，一致性比例较漂白前有所提高。结论电脑比色和视觉比色间既存在正相关关系，也存在差异，临床应用时应合理选择，亦可结合使用。Objective To investigate the correlation and variation of tooth shade measured by visual assessment and an electronic instrument. Methods One hundred and twenty subjects participating in clinical trials were measured for tooth shade prior to bleaching and post-treatment using two methods. Each tooth was assessed for shade by the same examiner using a Vitapan Classical Shade Guide （Vita Zahnfabrik, Germany）. The same tooth was measured for Vitapan Classical shade of the whole tooth, gingival 1/3, middle 1/3 and incisal 1/3 of the labial surface with ShadeVision （X-Rite Inc., Grandville, MI）. The results of ShadeVision measurement were compared to those of the same tooth assessed by the visual method, and percentages of the teeth with variations were calculated. The paired measurements were analyzed for correlation using the Spearman Rank Order Correlation method. Results The results of statistical analysis found that the two methods were significantly correlated （P〈0.01） in shade assessment. The correlation coefficient for the five data sets of whole tooth was 0.723, 0.739, 0.682, 0.705, 0.730, respectively. The highest correlation was the visual to electronic whole tooth and the middle 1/3; while the lowest was the visual to the gingival 1/3. There were variations in the shade of the same tooth determined by the two methods： 51.5%-71.0% having a difference of 2-shade or less and 41.0%N58.4% with variations of 1-shade or less. The two methods found the same shade in 19.6%-34.0% of the teeth, with post-treatment teeth having higher matching percentages. Conclusion The visual shade assessed by experienced examiner correlates with that measured by the ShadeVision; however, variations exit in the shade measured using these two methods.

关 键 词：漂白 比色 牙比色仪 牙比色板 

分 类 号：R446[医药卫生—诊断学] R783.1[医药卫生—临床医学]