多次烧结对二硅酸锂陶瓷后牙牙合贴面疲劳性能的影响

doi:10.19439/j.sjos.2020.06.005

上海口腔医学 ›› 2020, Vol. 29 ›› Issue (6): 586-590.doi: 10.19439/j.sjos.2020.06.005

多次烧结对二硅酸锂陶瓷后牙牙合贴面疲劳性能的影响

谷莉玲¹, 郭永锦^2,3,4, 程辉^2,3,4, 李秀容^2,3, 张贝洁^2,3

1.韶关市第一人民医院口腔科,广东韶关 512023;
2.福建医科大学口腔医学院,福建福州 350004;
3.福建医科大学附属口腔医院,福建福州 350002;
4.福建医科大学口腔生物力学及美学研究中心,福建福州 350004

收稿日期:2019-05-08 修回日期:2019-09-07 出版日期:2020-12-25 发布日期:2021-01-08
通讯作者: 郭永锦,E-mail：2090587501@qq.com
作者简介:谷莉玲(1991-),女,硕士,E-mail：515436367@qq.com
基金资助:
福建省卫生系统中青年骨干人才培养项目(2016-ZQN-58)

Effect of repeated firings on fatigue behaviors of posterior occlusal veneers made of glass ceramic

GU Li-ling¹, GUO Yong-jin^2,3,4, CHENG Hui^2,3,4, LI Xiu-rong^2,3, ZHANG Bei-jie^2,3

1. Department of Stomatology, Shaoguan First People' Hospital. Shaoguan 512023, Guangdong Province;
2. School of Stomatology, Fujian Medical University. Fuzhou 350004, Fujian Province;
3. Hospital of Stomatology, Fujian Medical University. Fuzhou 350002, Fujian Province;
4. Research Centre of Dental Biomechanics & Aesthetics. Fuzhou 350004, Fujian Province, China

Received:2019-05-08 Revised:2019-09-07 Online:2020-12-25 Published:2021-01-08

摘要/Abstract

摘要： 目的： 考察经不同烧结次数对后牙二硅酸锂陶瓷牙合贴面疲劳性能的影响。方法： 制作1.2 mm厚的IPS e.max CAD（IC）和IPS e.max Press（IP）后牙牙合贴面,按烧结次数（1次、3次、5次、7次）分组,粘接到上颌磨牙树脂代型上,经热机械疲劳试验后（TMFT）（5-55 ℃ 5000次循环、30-300 N、10 Hz、正弦波、500 000次循环）,进行抗折破坏实验,记录最大断裂载荷值。应用扫描电镜、EDX和 XRD分析材料的显微结构。采用SPSS 20.0软件包对数据进行统计学分析。结果： IC组烧结1次后平均载荷值最高,为（1546.73±192.85） N;IP组烧结3次后平均载荷值最高,为（1504.46±138.56） N。2组材料中,不同烧结次数对牙合贴面断裂载荷值无显著影响（P>0.05）。EDX和 XRD分析显示,2种材料成分无显著差异。SEM观察,在多次烧结后晶体尺寸变短,孔隙率增多。结论： 不同烧结次数对疲劳加载后二硅酸锂陶瓷后牙牙合贴面断裂载荷值有降低趋势,但无统计学差异,可满足临床要求。

关键词: 牙合贴面, 二硅酸锂基玻璃陶瓷, 烧结次数, 疲劳性能

Abstract: PURPOSE: To investigate the effect of firing times on the fatigue properties and failure modes of posterior occlusal veneers made of lithium disilicate glass ceramics. METHODS: According to the number of times of firing (1, 3, 5, 7 times), IPS e.max CAD(IC) and IPS e.max Press(IP) occlusal veneer restorations with a thickness of 1.2mm were prepared, and then cemented to the maxillary molar composite resin dies. Each group was subjected to thermo-mechanical fatigue(TMFT) test (5-55 ℃, 5000 cycles, 30-300 N, 10 Hz, sinusoidal wave, 500 000 cycles) and compressive loading. The maximum force at fracture was recorded. Stereomicroscope and scanning electron microscope(SEM), energy dispersive X-ray spectroscopy(EDX) and X-ray diffraction(XRD) were adopted to analyze the failure modes and microstructural features. Statistical analysis was performed with SPSS 20.0 software package. RESULTS: The highest average loads (N) at fracture for IC groups were (1546.73±192.85) N after one firing time; in IP group, the highest average loads were (1504.46±138.56) N after three firing times. There was no significant difference in the fracture load with different firing times for IC/IP(P>0.05). EDX and XRD analysis showed no significant difference in the composition of two materials. SEM showed that the size of crystal was shorter and the porosity increased after multiple firing. CONCLUSIONS: After repeated firing, the fatigue loading of lithium disilicate glass ceramics has a decreasing trend of fracture load value without any significant difference, and it meets clinical requirements.

Key words: Occlusal veneers, Lithium disilicate glass ceramic, Firing times, Fatigue properties

中图分类号:

R783.1

谷莉玲, 郭永锦, 程辉, 李秀容, 张贝洁. 多次烧结对二硅酸锂陶瓷后牙牙合贴面疲劳性能的影响[J]. 上海口腔医学, 2020, 29(6): 586-590.

GU Li-ling, GUO Yong-jin, CHENG Hui, LI Xiu-rong, ZHANG Bei-jie. Effect of repeated firings on fatigue behaviors of posterior occlusal veneers made of glass ceramic[J]. Shanghai Journal of Stomatology, 2020, 29(6): 586-590.

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多次烧结对二硅酸锂陶瓷后牙牙合贴面疲劳性能的影响

Effect of repeated firings on fatigue behaviors of posterior occlusal veneers made of glass ceramic

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