- 學位論文
以曼塞爾色彩系統配合三種牙科用比色機建構牙齒比色之理想流程
Establishing the optimal process of tooth color measuring with the Munsell Color System and three tooth color measuring machines
摘要
當牙科醫師與患者日漸著重牙科治療的在美學方面的應用時，牙科比色工作就成為臨床上相當重要的一環，傳統使用肉眼配合牙科比色板進行比色的方式不僅欠缺客觀性，環境光源、個人視覺感知的差異以及比色板設計和製作上的誤差所造成對比色過程的影響都會干擾到測試結果的準確性。而比色機的應用正可以幫助我們以儀器的穩定性減少人為操作和外在因素所導致的誤差，但目前比色機的應用仍受到牙科用比色機本身準確度的影響，未能獲得可信賴的比色成效。如何選擇適當工具相互配合校正以達成理想的顏色測量結果便是本研究之最終目的。 本研究利用一系統性分布的色板(曼賽爾色彩系統)，測試出各比色機本身對於顏色測量最為準確的範圍，並在人類自然牙齒色分布的範圍當中，將各比色機的優勢加以結合，以建構出準確度更為提升的比色流程，同時也提供了日後使用不同比色機時檢測出儀器弱點的方式。本研究最終選擇三款牙科用比色儀器(ShadeEye NCC(色度計)、 VITA EasyShade (光譜儀)、DeguDent Shadepilot(光譜儀))來針對人類自然齒色分布範圍內的曼賽爾色片進行測試，結果顯示在統計學上準確度顯著低於臨床肉眼可接受範圍的部分包含：ShadeEye NCC 在彩度大於6、明度小於4的區域，EasyShade在色調介於7.5YR到10YR之間、明度大於7的範圍，Degudent Shadepilot測量的數值並無顯著的差異，但在是色調介在10YR到10Y之間、明度介於5到7之間、彩度為2和6時表現更佳。 由本研究可知個別比色儀器在進行牙齒比色時能夠達到理想量測結果的範圍各不相同，在相互搭配下，避開各儀器本身不適用的色彩空間，便能夠獲得自然牙齒色範圍中最為理想及準確的比色結果，本研究最終所選用的三台牙科用比色儀器，可在人類的自然齒色分布範圍中組合出理想的使用搭配方式，以獲取值得信賴的量測結果。 在使用其他不同的比色儀器對牙齒色彩進行測試時，能夠依此流程先行歸納出個別比色機的準確範圍，便可進一步了解得到資訊的可信度，也可依此標準選擇出最適用的儀器，在最終測試結果仍有疑慮時，可輔以其他儀器進行再確認或利用傳統比色板比色做二次確認，以期得到更加可靠的結果。
並列摘要
As we pay increasing attention to dental aesthetics, tooth color matching has become an important part of daily dental practice. But measuring tooth color with dental shade guides by human eyes is not stable because of the inadequate design of the dental shade guide and the poor reliability of human eyes. The tooth color measuring machines provides another choice when dentists make the shade selection, but the accuracy of these machines is still controversial. The aim of this study is to combine the usage of the proper tools and conclude method which enhances the accuracy of tooth color measuring. The Munsell color tabs within the range of natural human teeth color were measured by three tooth color measuring machines (ShadeEye NCC, VITA EasyShade, DeguDent Shadepilot). The results showed when Chroma was higher than 6, and Value was lower than 4, the mean ΔE measured by ShadeEye NCC was significantly higher than the clinical acceptable range. When Hue located in 7.5YR and 10YR,Value was higher than 7, the mean ΔE measured by EasyShade was significantly higher than the clinical acceptable range. The measuring results of Degudent Shadepilot showed no significant different with Hue, Chroma, and Value, but when Hue located between 10YR to 10Y, Value located between 5 to 7 and Chroma was 2 and 6, Degudent Shadepilot showed better accuracy. As we know the limit of each dental color measuring machine by the procedure in this study, we could combine the usage of each machine and help us to achieve the optimal tooth color measuring result in daily dental practice.