玻璃着色剂对可切削渗透陶瓷复合体颜色影响的研究

目的 观测不同配方的玻璃着色剂对可切削渗透陶瓷（MIC）复合体颜色的影响。方法 确定渗透玻璃基本组分。测定其光学指数：色散值0.068 41（435.8-656.3 nm），折射率1.596 91（587.6 nm波长）。以基本配方为核心调整形成5种着色剂配方的渗透玻璃。将它们渗透到氧化铝圆片状试件中，TC-PIIG型色差计分别测量5种MIC复合体的L*、a*、b*值并与Vita In-ceram陶瓷颜色系数比较。结果 不同着色剂配方的MIC颜色体系的的主要区别在L*值，其次是a*值，b*值变化较小。MIC颜色体系L*值为64.55-71.46，a*值为3.35-7.38，b*值为10.00-12.41，Ca*b*11.38-13.95，ha*b*54.07-73.00。与Vita In-ceram陶瓷色系颜色参数接近。结论 渗透玻璃着色剂配方的改变主要影响渗透陶瓷复合体颜色表达的明度和色相，对彩度的影响相对较小，其颜色表达符合临床应用要求。

Investigation of the Function of the Glass Colorant on the Machinable Infiltrated Ceramics Color

OBJECTIVE: To investigae the function of the glass colorant on the color of the machinable infiltrated ceramics(MIC). METHODS: Five kinds of glass with different colorant were infiltrated through the aluminous matrix by heating the components to 1 100 degrees C for 2 hours. The specimens surface was polished, and their thickness was 0.5 mm. RESULTS: The refractive index of the MIC infiltration glass was 1.59691 (587.6 nm, nd) . The most different parameter of the MIC color were L*, then a*, and b* had little difference . The parameters of the color space of MIC were: L*(64.55-71.46), a*(3.35-7.38), b*(10.00-12.41), Ca*b*(11.38-13.95), ha*b*(54.07-73.00). These were almost close to the color parameters of Vita In-ceram. CONCLUSION: This experiment proved that the glass colorant was changed the MIC color parameters, and the main function was on L*, then a*. The ceramic color was up to the requirement of clinic.