摘要
目的研究两类三种陶瓷材料对瓷贴面修复颜色的影响,为临床工作中瓷贴面修复体与比色板的颜色匹配性提供指导。方法制作直径10mm、厚度0.7mm的A2色瓷贴面圆盘试件,按陶瓷材料及制作工艺分为无遮色长石质烤瓷组、遮色长石质烤瓷组、IPSe.maxPress铸瓷组3组。每组10个试件,共计30个试件。选择Natural Die Material Shade Guide比色板中的ND4、ND6、ND8三种颜色,分别代表轻、中、重度变色牙底色,采用对应颜色树脂各制作1个底色圆盘。对每个瓷贴面试件分别以3种底色圆盘为基牙底色,采用Vita Easyshade电脑比色仪测量瓷贴面修复体的色度值。计算各组瓷贴面修复体与标准比色片A2的色差。结果在轻、中、重度变色牙背景条件下,两种陶瓷材料的瓷贴面修复体与标准比色片A2间色差的比较结果为,IPS e.max Press铸瓷组<无遮色长石质烤瓷组<遮色长石质烤瓷组,差异有统计学意义(P<0.05)。结论采用长石质烤瓷贴面及IPS e.max Press热压铸瓷贴面模拟修复不同程度的变色牙时,热压铸瓷贴面与标准比色片的颜色匹配性高于长石质烤瓷贴面。
Objective This stud）, aimed to determine the color match of porcelain veneer restoration among different ceramic systems. Methods A2-color porcelain veneer disc specimens （diameter： 10 mm, thickness： 0.7 mm） were manufactured and divided into 3 groups according to different ceramic materials： opaque feldspathic porcelain group, non-opaque feldspathic porcelain group, and IPS e.max Press group. Three discolored underlying discs were made of natural die material resin with the color of ND4, ND6, ND8 （Natural Die Material Shade Guide）, which represented low, medium and heavy discolored tooth, respectively. The porcelain specimen was placed on the surface of discolored underlying disc, and then the L ＊a＊b ＊ value of each specimen was measured with Vita Easyshade. The mean color difference （AE） between the specimen and shade guide teeth A2 was calculated and analyzed. Results The comparison of AE value between the specimens and shade A2 between three groups were： IPS e.max Press group 〈 non-opaque feldspathic porcelain group 〈 opaque feldspathic porcelain group. The difference of AE was statistically significant among the three groups （P 〈 0.05）. Conclusion IPS e.max Press heated-pressed porcelain veneer restoration can obtain better expected shade than that of feldspathic porcelain when restore discolored teeth with the same color.
出处
《中华口腔医学研究杂志（电子版）》
CAS
2011年第6期32-36,共5页
Chinese Journal of Stomatological Research(Electronic Edition)
基金
广东省科技计划(2009B080701049)
关键词
瓷贴面
全瓷材料
核瓷
色差
Porcelain veneer
Ceramic material
Core thickness
Color difference
