国际口腔医学杂志 ›› 2015, Vol. 42 ›› Issue (3): 294-298.doi: 10.7518/gjkq.2015.03.012

• 论著 • 上一篇    下一篇

不同全瓷冠在金铂合金基核表面颜色变化的分析

陈奕帆1 刘红春2 孟玉坤3 巢永烈3 杨晓喻1   

  1. 1.南方医科大学附属口腔医院•广东省口腔医院修复科 广州 510280; 2.中山大学光华口腔医学院附属口腔医院•广东省口腔医学重点实验室 广州 510055; 3.口腔疾病研究国家重点实验室 华西口腔医院修复科(四川大学) 成都 610041
  • 收稿日期:2014-09-22 修回日期:2015-01-23 出版日期:2015-05-01 发布日期:2015-05-01
  • 通讯作者: 杨晓喻,主任医师,博士,Email:twindoctor@sina.com
  • 作者简介:陈奕帆,副主任医师,博士,Email:chenyifan0209@sina.com
  • 基金资助:

    广东省医学科研基金(A2013103)

A study of colorimetric characteristics of the gold-platinum alloys substructure covered by different all-ceramic crowns before and after veneered application

Chen Yifan1, Liu Hongchun2, Meng Yukun3, Chao Yonglie3, Yang Xiaoyu1   

  1. 1. Dept. of Prosthodontics, Guangdong Provincial Stomatological Hospital, Southern Medical University, Guangzhou 510280, China; 2. Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, China; 3. State Key Laboratory of Oral Diseases, Dept. of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2014-09-22 Revised:2015-01-23 Online:2015-05-01 Published:2015-05-01

摘要:

目的 评估金铂合金基核表面不同全瓷冠各部位的色度学参数及其与目标色片色差。方法 按照全瓷冠基牙预备体要求制作金铂合金基核,分别戴入Procera氧化铝、Procera氧化锆、Lava氧化锆、IPS E.max高度不透明压铸陶瓷底冠,分光光度仪分别在底冠的颈1/3、体1/3、切1/3随机取点测色。4种底冠烧结体瓷后戴入金铂基核,分光光度仪测色,以Vitapan比色板A2体瓷色片为对照,对数据进行比较。结果 4组底冠均提高基核的L*值,高于A2;a*值明显下降,低于A2;b*值较基核正负方向变化不一致。烧结体瓷后,各组L*值均下降,且低于A2。a*值和b*值均明显呈红黄色轴方向上升,各组a*值低于A2;b*值与A2接近,与A2色差减小。结论 4组全瓷冠对金属基核都有较好遮色性,但各组冠明度略低于对照A2,彩度偏绿,色差在临床可接受范围;但人眼可分辨,仍需进一步减小色差,提高颜色匹配度。

关键词: 分光光度比色仪, 全瓷, 颜色, 金铂合金

Abstract:

Objective To evaluate the optical data of the different sites of the gold-platinum alloys substructures covered by four different all-ceramic crowns, as well as the color difference between the crowns and target tab by using a digital dental spectrophotometer. Methods Ten gold-platinum alloy substructures were made and were respectively tested on four different groups of all-ceramic crowns(Procera aluminia, Procera zirconia, Lava zirconia, and IPS E.max glass-ceramic lithium disilicate-reinforced monolithic crown). The color data of the cervical, body, incisal sites of the specimens were recorded and analyzed by a spectrophotometer. The L*, a*, b* values were measured again after veneered application. The color difference between the substructures covered by all-ceramic crowns and target A2 dentine shade tab was evaluated. Results The L* values of the substructures can be increased by all four groups of all-ceramic copings and were higher than that of the A2 tab, but a* values were decreased and lower than A2 tab. The b* values showed inconsistent tendency of change. A statistical difference was found among four groups of copings. After veneered application, the L* values of all the copings declined and were lower than that of the control group. The values of a* and b* increased significantly, but the a* of the specimens was lower than that of the control. When compared with A2 dentine shade tab, the ΔΕ of the crowns was small, but the color difference was still clinically perceptible by human eyes. Conclusion Four ceramic crowns, made up of just coping and dentine porcelain, effectively promoted the color of the alloy www.gjkqyxzz.cn substructures, but the lightness and hue were lower than the target A2. The color difference between the specimens and target was clinically acceptable, but noticeable. Thus, veneering porcelain with lower color saturation and high translucency is needed.

Key words: spectrophotometer, all-ceramic, color, gold-platinum alloys

中图分类号: 

  • R 783.3
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