Hassel Alexander J, Koke Ulrich, Schmitter Marc, Beck Joachim, Rammelsberg Peter
Department of Prosthodontics, University of Heidelberg, Germany.
Int J Prosthodont. 2005 Sep-Oct;18(5):422-6.
The objective of this study was to investigate whether a systematically arranged shade guide system (Vita 3D-Master) allows clinicians to achieve a better shade match of a restoration, as compared to a conventional shade guide with a design based on empirical values (Vita Classical).
Fifty-nine restorations in 42 patients being treated by student clinicians were assessed. Using 1 of the 2 shade systems assigned randomly, each student independently determined the tooth shade. With the aid of a visual rating scale, the accuracy of the shade match of the finished restoration was assessed.
All restorations whose shades had been determined with the 3D-Master could be placed without any further shade corrections. In contrast, almost 17% of restorations determined with the conventional system required subsequent shade modifications. The match of the shades selected with the 3D-Master was judged significantly better by the clinicians.
Within the limitations of the study, clinicians with less clinical experience who use a system that guides them through the shade-taking procedure in a relatively systematic manner will be more successful in selecting the correct tooth shade and in avoiding shade corrections. Clinical assessment of the restoration shades showed significant differences between the shade guide with a systematic design and that based on empirical values.
本研究的目的是调查与基于经验值设计的传统比色板（Vita Classical）相比，系统排列的比色板系统（Vita 3D-Master）是否能使临床医生获得更好的修复体颜色匹配。
对42名由学生临床医生治疗的患者的59个修复体进行评估。学生们使用随机分配的两种比色系统中的一种，各自独立确定牙齿颜色。借助视觉评分量表，评估完成修复体的颜色匹配准确性。
所有用3D-Master确定颜色的修复体无需进一步颜色校正即可就位。相比之下，用传统系统确定颜色的修复体中近17%需要后续颜色调整。临床医生判定用3D-Master选择的颜色匹配明显更好。
在本研究的局限性范围内，临床经验较少的临床医生使用以相对系统的方式指导其比色过程的系统，在选择正确牙齿颜色和避免颜色校正方面会更成功。修复体颜色的临床评估显示，具有系统设计的比色板与基于经验值的比色板之间存在显著差异。
