A、B色系IPS E.max LT底层材料色度值和相对透明率测定  

Relative translucency and chromatic value test of A and B color series IPS E. max LT core materials

作　　者：邵龙泉[1] 孙挺[1] 伊元夫[2] 邓斌[3] 温宁[3] 刘琦[1] 

机构地区：[1]南方医科大学南方医院口腔科,广州510515 [2]武警总医院口腔科 [3]解放军总医院口腔医学中心

出　　处：《实用口腔医学杂志》2011年第6期765-768,共4页Journal of Practical Stomatology

基　　金：广东省自然科学基金资助(编号:9151051501000072);广州市白云区科技计划项目资助(编号:2010-KZ-20);南方医科大学南方医院院长基金资助(编号:2009B016)

摘　　要：目的:测定A、B色系IPS E.max LT底层材料的CIE-1976-L*a*b*色度值和相对透明率。方法:制作直径为13mm、厚度为0.3 mm和0.5 mm的A、B色系盘状IPS E.max LT试件,色号包括A1、A2、A3、A3.5、A4、B1、B2、B3、B4,共计18组(n=5),应用CM-5分光测色计测试试件在标准黑、白背景下的表面光反射率Y值,记录Yb、Yw平均值,计算相对透明率(Yb/Yw);测试A、B色系瓷锭的色度值。结果:同一色系内,各组瓷锭明度值的总体均数不相等,组间差异具有显著性(P<0.01)。从A1到A4、B1到B4,明度值均逐渐减低。相同厚度、相同色系的试件组间相对透明率差异无显著性(P>0.05),相对透明率数值分布范围为0.330 9～0.587 5。相同色号、不同厚度的2组试件组间差异均具有显著性,0.3 mm组底层材料的相对透明率小于0.5 mm组(P<0.05)。结论:厚度是A、B色系IPS E.max LT底层材料相对透明率的重要相关因素。Objective： To study the relative translucency and chromatic value of IPS E.max A and B color series core materials.Methods： Cylindrical core materials dentine porcelain specimen disks with diameter of 13.0 mm,thickness of 0.3 mm or 0.5 mm were respectively made（n=5）.The reflectivity value（Yb and Yw） of all samples was determined with CM-5 chromatism instrument,and the relative translucency（Yb/Yw） was calculated.The chromatic value of ceramic ingots provided by the manufacturer was measured too.Results： L＊ of ceramic ingots was significantly different among specimen groups of A or B color series（P0.01）.From A1 to A4 and from B1 to B4,L＊ declined.There was no significant different among specimen groups which had same thickness and belonged to same color series.The range of relative translucency was between 0.330 9 and 0.587 5.Significant difference was found between specimen groups which had different thickness and same color number（P〈0.05）.Conclusion： Thickness is an important factor of translucency for IPS E.max LT core materials.

关 键 词：底层材料 色系 相对透明率 色度 

分 类 号：R783.1[医药卫生—口腔医学]