不同桩核材料对四种牙科底层瓷颜色的影响  

Influence of background color on chromatic value of four all-ceramic system core materials

作　　者：马永刚[1] 张念[1] 邓旭亮[1] 

机构地区：[1]清华大学玉泉医院口腔科,北京100049

出　　处：《中华口腔医学杂志》2010年第6期367-369,共3页Chinese Journal of Stomatology

摘　　要：目的探讨3种桩核材料对4种牙科底层瓷颜色的影响，以期为修复医师正确选择适宜的修复材料提供参考。方法制作A2色热压铸二硅酸锂玻璃陶瓷（EmpressⅡ，A组）、z2色瓷沉积氧化锆陶瓷（B组）、氧化锆陶瓷（Cercon base color，C组）、氧化锆陶瓷（Cercon base，D组）底层瓷试件各5个，A组试件厚度为0．80mm，B～D组试件厚度为0．50mm。采用色差计测量4组底层瓷试件在金铂合金、镍铬合金和复合树脂背景上的色度值，并计算每种底层瓷在不同背景间的色差值（△Eab^＊）。结果B、C和D组试件在不同背景间的色差均值分别为（0．14±0．08）、（0．90±0．20）和（0．99±0．09），不易为人眼所辨别（△Eab^＊〈1．5），而A组试件在不同背景间的色差均值为（2．83±0．70），能够为人眼所辨别（△Eab^＊〉1．5）。结论玻璃陶瓷易受背景颜色的影响，宜在与牙齿颜色相近的桩核条件下使用；氧化锆的遮色能力强，适用于基牙严重变色或染色以及各类非牙色桩核等情况。Objective To investigate the influence of post-core background color on chromatic value of four all-ceramic system core materials at clinically appropriate thicknesses. Methods Disc specimens of 15 mm in diameter and 0. 80 mm in thickness（Empress Ⅱ ： Group A）, and 0. 50 mm in thickness （In- Ceram Zirconia core ： Group B ; Cercon base color zirconia core ： Group C ; Cercon base zirconia core ： Group D） were fabricated, five in each group. Au-Pt alloy, Ni-Cr alloy and visible light cured dental composite resin（ A2 color） background were prepared. Samples were put on different background and their chromatic values were measured with colorimeter （CIE-1976-L^＊ a^＊ b^＊ ） . Color differences of each specimen on different background material were calculated. Results The color differences among specimens of Group A on different background material were more than 1.5 （ 2. 83 ±0. 70 ） which meant it could be noticeable to eyes. Those of zirconia were less than 1.5[Group B： （0. 14 ±0. 08） ; Group C： （0. 90 ±0. 20） ; Group D： （0. 99 ±0. 09 ） ]. Conclusions The influence of background color on Group A was noticeable to human eyes, and as a result, tooth-colored post should be used for this all-ceramic system. For the other three kinds of zirconia core material system, the color differences among specimens on different background material were unnoticeable. Therefore the three all-ceramic systems have excellent color masking ability and can be used on all color background.

关 键 词：陶瓷制品 氧化锆 背景色 

分 类 号：R783[医药卫生—口腔医学]