烧结次数对椅旁计算机辅助设计与制作二硅酸锂玻璃陶瓷贴面不同部位颜色的影响

doi:10.7518/hxkq.2017.04.009

华西口腔医学杂志 ›› 2017, Vol. 35 ›› Issue (4): 389-394.doi: 10.7518/hxkq.2017.04.009

烧结次数对椅旁计算机辅助设计与制作二硅酸锂玻璃陶瓷贴面不同部位颜色的影响

黄璀¹(), 余佳², 蒙绍峰², 高碧云³

1.广西医科大学附属口腔医院修复科
2.修复科技工制作室
3.儿童牙病科,南宁 530021

收稿日期:2016-11-20 修回日期:2017-05-10 出版日期:2017-08-01 发布日期:2017-08-01
作者简介:
黄璀,主治医师,硕士,E-mail:susanhc@163.com
基金资助:
广西医科大学青年基金（GXMUYSH201523）

Effect of repeated sintering and variations in thickness on the color and microstructure of dental lithium disilicate-based glass ceramic veneers

Cui Huang¹(), Jia Yu², Shaofeng Meng², Biyun Gao³

1. Dept. of Prosthodontics, Stomatology Hospital of Guangxi Medical University, Nanning 530021, China
2. Dept. of Dental Laboratory Center, Stomatology Hospital of Guangxi Medical University, Nanning 530021, China
3. Dept. of Pediatric Dentistry, Stomatology Hospital of Guangxi Medical University, Nanning 530021, China

Received:2016-11-20 Revised:2017-05-10 Online:2017-08-01 Published:2017-08-01
Supported by:
Youth Foundation of Guangxi Medical University (GXMUYSH201523)

摘要/Abstract

摘要：

目的评价烧结次数和渐变厚度及其交互性对椅旁计算机辅助设计与制作（CAD/CAM）二硅酸锂玻璃陶瓷贴面不同部位颜色的影响。方法在标准中切牙模型上制备贴面修复模型,用椅旁扫描仪采集光学印模,椅旁CAD/CAM系统制作24个二硅酸锂玻璃陶瓷贴面样本共4组（n=6）,初次结晶组为对照组S0,其余按上釉烧结次数依次为S1、S2、S3组。使用Vita easyshade电子比色仪测定每个贴面的色彩参数L、C、H、a、b,用SAS 9.1.3统计软件采用重复测量多因素方差方法分析不同烧结次数以及不同部位厚度间各颜色指标的差异性。最后扫描电镜（SEM）观察每组贴面的晶体排列和致密度。结果随着烧结次数增加,试件的L值总体呈减小趋势（P<0.05）。C和b的烧结次数有统计学意义（P<0.05）,其中,除S2组与S3组之间差异无统计学意义外（P>0.05）,其余各组之间的两两比较差异均有统计学意义（P<0.05）。SEM观察发现二硅酸锂晶体随着烧结次数增加,晶体变大,晶体间的孔隙变小,晶体间的锁结变得更为紧密。结论上釉次数和厚度及其交互性对二硅酸锂玻璃陶瓷的色相、明度、彩度均存在影响。

关键词: 贴面, 多次烧结, 计算机辅助设计与制作, 二硅酸锂玻璃陶瓷, 颜色, 扫描电镜

Abstract:

Objective The aim of this study is to evaluate the effect of repeated sintering and variation in thickness on the color and microstructure of dental lithium disilicate-based glass ceramic veneers. Methods A total of 24 computer aided design and computer aided manufacturing (CAD/CAM) veneers was fabricated using the IPS e.max-CAD LS2 and then randomly divided into four groups (S0, S1, S2, S3; n=6). Each group was sintered 0, 1, 2, 3 times individually according to the manufacturer’s recommendation. The color parameters (L, C, H, a, b values) of all the specimens were measured by a Vita easyshade dental colorimeter. The results were statistically analyzed using the SAS 9.1.3 software for MANOVA and LSD. Subsequently, the microstructures of the intersecting surfaces of the specimens were observed by scanning electron microscopy (SEM). Results After repeated sintering, the L value significantly decreased (P<0.05). For the C and b values, statistical differences were observed among the groups except between S2 and S3. SEM results showed that the interlocking microstructures of rod-shaped Li₂Si₂O₅ crystals became more compact when the number of sintering times was increased. Conclusion Repeated sintering exhibited significant influence on the color of the IPS e.max-CAD LS2 veneers.

Key words: veneer, repeated sintering, computer aided design and computer aided manufacturing, lithium disilicate-based glass ceramic, color, scanning electron microscope

中图分类号:

R783.2

黄璀, 余佳, 蒙绍峰, 高碧云. 烧结次数对椅旁计算机辅助设计与制作二硅酸锂玻璃陶瓷贴面不同部位颜色的影响[J]. 华西口腔医学杂志, 2017, 35(4): 389-394.

Cui Huang, Jia Yu, Shaofeng Meng, Biyun Gao. Effect of repeated sintering and variations in thickness on the color and microstructure of dental lithium disilicate-based glass ceramic veneers[J]. West China Journal of Stomatology, 2017, 35(4): 389-394.

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组别	L	C	H	a	b
S0	89.350±0.610	23.483±0.551	94.122±2.960	-1.689±1.222	23.389±0.523
S1	89.139±0.772	30.889±3.173	82.778±3.785	4.050±2.061	30.578±3.047
S2	89.622±1.258	26.883±3.981	90.572±5.517	0.194±2.469	26.778±3.935
S3	87.806±1.175	26.444±4.102	87.589±5.162	1.400±2.526	26.300±4.014

组别	L	C	H	a	b
S0	87.111±0.561	22.594±0.310	93.700±2.900	-1.467±1.148	22.528±0.316
S1	86.667±0.761	29.828±3.124	82.267±3.363	4.167±1.844	29.494±2.977
S2	86.583±0.979	28.517±4.371	87.456±4.851	1.522±2.472	28.378±4.311
S3	84.406±0.610	28.544±2.632	83.078±3.509	3.539±1.729	28.278±2.563

组别	L	C	H	a	b
S0	86.400±0.506	21.994±0.310	92.944±2.960	-1.133±1.138	21.950±0.305
S1	85.961±0.608	30.333±2.083	80.456±2.088	5.422±0.463	29.878±1.985
S2	85.433±1.187	27.783±4.292	86.950±5.152	1.739±2.551	27.628±4.217
S3	83.339±0.868	27.911±2.750	82.117±3.565	3.939±1.718	27.578±2.646

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烧结次数对椅旁计算机辅助设计与制作二硅酸锂玻璃陶瓷贴面不同部位颜色的影响

Effect of repeated sintering and variations in thickness on the color and microstructure of dental lithium disilicate-based glass ceramic veneers

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