Department of Restorative Dentistry and Biomaterials Sciences, Harvard School of Dental Medicine, Boston, MA 02115, USA.
J Esthet Restor Dent. 2010 Feb;22(1):42-52. doi: 10.1111/j.1708-8240.2009.00311.x.
Color matching of a natural maxillary central incisor is one of the most difficult challenges in clinical dentistry. Accurate color determination and interpretation of tooth color information in ceramic work is an important step in achieving success in ideal color reproduction. In this case study, factors that influence tooth color determination were analyzed, and the process of interpretation of tooth color information was assessed based on scientific color data using a novel dental spectrophotometer system. An all-ceramic crown for a maxillary right central incisor was the subject of this color assessment. The contralateral incisor was an intact natural tooth that was bleached and then used as the target shade for an all-ceramic crown. The dental spectrophotometer (Crystaleye, Olympus, Tokyo, Japan) was used for tooth color measurement and analysis. The target tooth, prepared tooth, maxillary arch, and face images were captured for color information. Tooth color stabilization related to tooth bleaching and tooth dehydration was assessed. Based on tooth color data obtained by the dental spectrophotometer, color was analyzed in several different areas of a tooth using CIELAB (Commission Internationale de l'Eclarirage) color coordinates L*, a*, b*, and color difference Delta E. Interpretation of the tooth color information was made in each of porcelain layers on a blue map, and its intensions for color reproduction were described. Throughout this spectrophotometric assessment, the process of stabilized tooth color determination, tooth color analysis, interpretations, and fabrication of a blue map for porcelain work was clarified with color data as scientific evidence.
The use of a dedicated dental spectrophotometer allows the evaluation and measurement of the color of a bleached tooth. This allows the laboratory technician to more precisely understand the bleached tooth shade as well as when the bleached tooth color has become stable enough to match to a contralateral all-ceramic crown restoration.
上颌中切牙的比色是临床牙科中最具挑战性的难题之一。准确确定颜色并解释陶瓷工作中的牙齿颜色信息是实现理想颜色再现成功的重要步骤。在本案例研究中，分析了影响牙齿颜色确定的因素，并使用新型牙科分光光度计系统基于科学颜色数据评估了解释牙齿颜色信息的过程。上颌右中切牙的全陶瓷冠是本次颜色评估的对象。对侧切牙是完整的天然牙齿，经过漂白，然后用作全陶瓷冠的目标色调。使用牙科分光光度计（Olympus，Tokyo，Japan 的 Crystaleye）进行牙齿颜色测量和分析。拍摄目标牙齿、制备牙齿、上颌弓和面部图像以获取颜色信息。评估与牙齿漂白和牙齿脱水相关的牙齿颜色稳定性。基于牙科分光光度计获得的牙齿颜色数据，使用 CIELAB（Commission Internationale de l'Eclarirage）颜色坐标 L*、a*、b*和颜色差异 Delta E 分析牙齿的几个不同区域的颜色。在蓝色地图上的每个瓷层中对牙齿颜色信息进行解释，并描述其颜色再现的强度。在整个分光光度评估过程中，使用专用的牙科分光光度计可以评估和测量漂白牙齿的颜色。这使实验室技术人员能够更准确地了解漂白后的牙齿色调，以及当漂白后的牙齿颜色足够稳定以匹配对侧全陶瓷冠修复体时。
专用牙科分光光度计的使用可以评估和测量漂白牙齿的颜色。这使实验室技术人员能够更准确地了解漂白后的牙齿色调，以及当漂白后的牙齿颜色足够稳定以匹配对侧全陶瓷冠修复体时。
