Judeh Ahmad, Al-Wahadni Ahed
Ajman University of Science & Technology, Ajman, UAE.
Quintessence Int. 2009 Oct;40(9):e69-79.
Inconsistencies among dentists in matching natural tooth shades have been documented. This study examined the reliability of a spectrophotometer in shade selection compared to visual method.
Nine observers with normal color vision were asked to visually and digitally match shades of nine maxillary models with incisors being replaced by Vita Classical shade guide tabs. The same test was carried out in vivo on nine subjects' maxillary central incisors. Observers included prosthodontists, dental technicians, and postgraduate students.
No significant difference was found among observers in shade selection regardless of the selection method. However, there was a significant difference between digital and visual methods in shade selection. Digital method was five times more likely to match the original shade color compared to visual method.
The system does not solve all problems involved in the determination of a tooth shade. Vita Easyshade spectrophotometer was more likely to match the shade compared to visual method. Nevertheless, this system needs further refinement, as well as software upgrades. Shade-matching devices could help clinicians and technicians achieve a better shade choice. The combination of visual shade analysis and digital shade measurement together lies in the precise predictability of the miscibility of shades.
已有文献记载，牙医在匹配天然牙颜色时存在不一致性。本研究比较了分光光度计与视觉方法在颜色选择方面的可靠性。
九名具有正常色觉的观察者被要求通过视觉和数字方式匹配九个上颌模型的颜色，这些模型的门牙被维他经典比色板所替代。同样的测试也在九名受试者的上颌中切牙上进行。观察者包括口腔修复医生、牙科技师和研究生。
无论采用何种选择方法，观察者在颜色选择上均未发现显著差异。然而，在颜色选择方面，数字方法和视觉方法之间存在显著差异。与视觉方法相比，数字方法匹配原始颜色的可能性高出五倍。
该系统并未解决牙齿颜色测定中涉及的所有问题。与视觉方法相比，维他易美分光光度计更有可能匹配颜色。然而，该系统需要进一步完善以及软件升级。颜色匹配设备可以帮助临床医生和技术人员做出更好的颜色选择。视觉颜色分析和数字颜色测量相结合在于颜色混合的精确可预测性。
