一种CAD/CAM复合树脂块低温老化后的晶相、结构及抗弯强度稳定性的评价

›› 2020, Vol. 40 ›› Issue (4): 309-312.

一种CAD/CAM复合树脂块低温老化后的晶相、结构及抗弯强度稳定性的评价

颜越¹,谢海峰²,孟虹良³,陈冰卓⁴,⁵,陈晨³,张怀勤⁶

1. 南京医科大学口腔疾病研究江苏省重点实验室，南京医科大学附属口腔医院修复科
2. 南京医科大学口腔疾病研究江苏省重点实验室,南京医科大学附属口腔医院口腔修复科
3. 南京医科大学附属口腔医院
4. 南京医科大学
5.
6. 江苏省口腔医院修复科

收稿日期:2019-10-22 修回日期:2020-01-01 出版日期:2020-04-28 发布日期:2020-04-28
通讯作者: 张怀勤 E-mail:dentzhq@126.com
基金资助:
国家自然科学基金;江苏省自然科学基金;青蓝工程和江苏高校优势学科建设工程资助项目

Investigation of the crystalline phase, structure and flexural resistance stability of a CAD/CAM composite resin block after low temperature aging

Received:2019-10-22 Revised:2020-01-01 Online:2020-04-28 Published:2020-04-28
Supported by:
National Natural Science Foundation of China;Natural Science Foundation of Jiangsu Province;the Qing Lan Project and the Priority Academic Program Development of Jiangsu Higher Education Institutions

摘要/Abstract

摘要： 目的　研究体外低温老化处理对一种含氧化锆填料的CAD/CAM复合树脂块的氧化锆晶相、结构及该材料抗弯性能的影响。方法　制备16枚相同尺寸的Lava Ultimate（LU）长条试件，在低温老化（高压灭菌釜内，温度134 ℃、压力0.2 MPa下持续处理20 h）前后分别对试件进行X射线衍射（XRD）和扫描电子显微镜（SEM）分析，用以评价LU体外低温老化后的晶相及结构稳定性。同时，用万能试验机测试试件的抗弯性能，对数据集进行单因素方差分析，评价其抗弯性能的变化。结果　低温老化前后LU的弯曲强度分别为（185.33±19.22）和（220.89±20.88） MPa，低温老化前后的弯曲模量分别为（14.16±0.92）和（20.93±0.97） GPa，低温老化处理后均显著提高（P＜0.05）。X射线衍射图发现LU老化前后氧化锆晶相未发生变化。扫描电镜图发现，LU老化后微观结构更加致密。结论　Lava Ultimate在低温老化处理下具有良好的晶相、结构及抗弯性能稳定性。

关键词: CAD/CAM复合树脂块, 低温老化, 晶相, 抗弯, 微观结构

Abstract: Objective　To investigate the effect of in vitro low temperature aging treatment on the crystalline phase, structure and flexural property of a CAD/CAM composite resin block containing zirconia fillers. Methods Sixteen Lava Ultimate (LU) bars with the same size were prepared. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to evaluate the crystalline phase and structure stability of LU before and after low temperature aging (in an autoclave at 134℃ and 0.2 MPa for 20 hours). Meanwhile, the flexural property of specimens was tested by the universal testing machine, and then the statistical analysis of flexural strength and flexural modulus was performed using the SPSS 22.0 statistical software package to evaluate the flexural stability of LU after low temperature aging. Results　The flexural strengths of LU were (185.33±19.22）, (220.89±20.88） MPa and the flexural moduli were (14.16±0.92), (20.93±0.97） GPa before and after low temperature aging. They were significantly higher than those before aging (P＜0.05). XRD patterns showed that zirconia crystal phase of LU did not change after low temperature aging, and the results of SEM showed that the microstructure of LU after aging was more compact. Conclusion Lava Ultimate performs good crystalline phase, structure and flexural stability under low temperature aging treatment.

Key words: CAD/CAM composite resin block, low temperature aging, crystalline phase, flexural resistance, micro-structure

中图分类号:

R783.1

颜越谢海峰孟虹良陈冰卓陈晨张怀勤. 一种CAD/CAM复合树脂块低温老化后的晶相、结构及抗弯强度稳定性的评价[J]. 口腔医学, 2020, 40(4): 309-312.

[1]	沈佳娣谢海峰何峰陈晨. 一种新型超透明氧化锆陶瓷的颜色和结构稳定性评价[J]. , 2020, 40(2): 97-100.
[2]	钱梦珂沈树平顾郁嘉何峰张怀勤谢海峰. 醋酸及柠檬酸对牙科氧化锆陶瓷性能的影响[J]. , 2016, 36(7): 583-586.
[3]	冷旭,严晓东,毛钊,李益材,汤学华. 氧化锆和金属基底饰面瓷机械性能与微观结构的比较研究[J]. , 2012, 32(10): 605-608.
[4]	孙蕾,张富强,高益鸣,靳喜海,高濂. 二次烧结温度对牙科纳米氧化锆陶瓷抗弯强度影响的实验研究[J]. , 2008, 28(2): 70-71,77.