GI-Ⅱ型渗透陶瓷全瓷底层材料透射率的测定

华西口腔医学杂志

GI-Ⅱ型渗透陶瓷全瓷底层材料透射率的测定

孟玉坤,巢永烈,廖运茂

610041 四川大学华西口腔医学院

收稿日期:2002-10-25 修回日期:2002-10-25 出版日期:2002-10-20 发布日期:2002-10-20
基金资助:
本课题为国家教委博士点基金资助项目(编号9845)

Spectral Transmittance of GI-ÒGlass/Alumina Composite

Meng Yukun, Chao Yonglie, Liao Yunmao

Meng Yukun, Chao Yonglie, Liao Yunmao West China College ofStomatology, Sichuan University

Received:2002-10-25 Revised:2002-10-25 Online:2002-10-20 Published:2002-10-20

摘要/Abstract

摘要：

目的:探讨GI-Ò型渗透陶瓷底层材料的透光率及材料颜色、厚度、不同玻璃渗透烧烤工艺对透光率的影响规律。方法:制作直径为1215 mm,厚度分别为015、110、115 mm的GI-Ò渗透陶瓷及Vita In-CeramAlumina样本;另制作015 mm厚的样本,按5个不同的渗透时间和3个不同的渗透温度分组,以上每组的样本数目均为3个。用分光光度计测量各组的可见光积分透射率(标准A光源,光束直径5 mm,波长范围380~780 nm)。结果:GI-Ò型渗透陶瓷材料的透射率范围为217%~415%,Vita In-CeramAlumina材料为214%~512%;随样本颜色饱和度值的增加及明度值降低,透射率也降低;同种颜色样本随厚度增加透射率下降;透射率随渗透烧烤时间的延长呈增大趋势,6 h以后则下降;随渗透温度升高,Vita In-Ceram Alumina的透射率下降,GI-Ò渗透陶瓷材料则增加。结论:GI-Ò渗透陶瓷底层材料具有较好的透光性能。因渗透烧烤工艺、颜色及厚度对透射率有影响,临床应用时应加以考虑。

关键词: 牙科陶瓷, 渗透陶瓷, 透射率

Abstract:

Objective:The purposes of this study were to determine the spectral transmittance of GI-Òglass/alumina composites and to explore the effects of different specimen thickness and firing arts of glass infiltration on the transmittance. Datawere comparedwith those of Vita In-Ceram Alumina materials.Methods:Plate-shaped specimens 1215 mm in diameter, with 3 thickness (015, 110, 115 mm), 6 colorgroups forGI-Òand 4 colorgroups forVita In-CeramAlumina were fabricated. Specimens of colorAL2 for In- Ceram and IG2 forGI-Òwere selected in the study of relationship between different infiltration arts and transmittance. Five infil- tration time duration and three temperatureswere studied. A spectrophotometerwith standard A light source paralleled lightbeam 5 mm in diameter and spectra range 380~780 nmwas employed to measure the spectral transmittance.Results:The range of spec- tral transmittance were 217%~415% for GI-Òand 214%~512% for Vita In-Ceram Alumina. Transmittance decreased with specimen thickness, buttheywere not linearly related. Transmittance ofGI-Òtended to increase and thatofVita In-CeramAlumi- na decreased as the infiltration temperature elevated. The transmittance increased with infiltration time less than 4 hours and re- ducedwith prolonged time over 6 hours for both materials.Conclusion:GI-Òglass/alumina composite has comparatively lower translucency. Influences of factors as color, thickness and infiltration arts on translucency of restorations should be considered in the clinical selection of the all-ceramic materials.

Key words: dental ceramics, glass/alumina composite, spectral transmittance

孟玉坤,巢永烈,廖运茂. GI-Ⅱ型渗透陶瓷全瓷底层材料透射率的测定[J]. 华西口腔医学杂志.

Meng Yukun, Chao Yonglie, Liao Yunmao. Spectral Transmittance of GI-ÒGlass/Alumina Composite[J]. West China Journal of Stomatology.

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