喷砂对牙科氧化锆陶瓷材料弯曲强度和疲劳性能的影响

摘要
图/表
参考文献
相关文章 (0)

全文: PDF (1467 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要目的：探讨喷砂对氧化锆陶瓷材料三点弯曲强度和疲劳性能的影响。方法：按照随机数字表，将60个氧化锆陶瓷试样随机分成喷砂组和对照组，每组30个试样。喷砂组表面抛光后再进行喷砂处理，对照组表面进行抛光。对喷砂组和对照组进行三点弯曲强度测试，使用Weibull函数分析喷砂对HT锆瓷弯曲强度可靠性的影响，并采用成组t检验分析三点弯曲强度测试结果。对喷砂组和对照组进行疲劳实验，试样在循环载荷作用下的裂纹扩展情况用裂纹扩展速率曲线描述。结果：喷砂组和对照组的m-ZrO2相对含量分别为11.10%和6.24%。喷砂组和对照组三点弯曲强度测试结果分别为（1 228.36±137.33）MPa和（1 200.50± 114.74）MPa，差异有统计学意义（P＜0.05）；Weibull模数分别为13.52、12.03；应力腐蚀指数分别为35.80、32.87；发生裂纹扩展时的应力强度因子△K仅相当于其断裂韧性的51.90%和50.90%。结论：经过本研究所述方法喷砂处理后的HT锆瓷的三点弯曲强度升高，抵抗裂纹扩展的能力增强。

	服务
	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	王梁
	龚旭
	吴伟
	陈吉俊
	吴冰
	李幼华

关键词 ：牙科氧化锆陶瓷, 喷砂, Weibull分析, 弯曲强度, 循环疲劳, 疲劳性能

Abstract：Objective: To evaluate the effect of sandblasting on the flexural strength and fatigue property under cyclic loading of the dental zirconia ceramics. Methods: After polished, sixty bar-shaped specimens of HT were assigned to two groups (n=30) according to the random number table, one of which was sandblasted by alumina particles, the other was polished. The flexural strength of experimental group and control group was obtained from three-point flexural test, then examined by Weibull statistics and analyzed by the group t-test. The number of cycles to fracture was obtained from cyclic fatigue test. The fatigue crack growth rate curve based on Pairs law was used to describe the crack propagation. Results: The phase content of m-ZrO2 experimental group and control group were 11.1% and 6.24%. The flexural strength of experimental group and control group were 1 228.36±137.33 MPa and 1 200.55±114.74 MPa (P<0.05). The Weibull module of the two groups was 13.52 and 12.03. The stress corrosion cracking susceptive indexes were 35.80 and 32.87. The crack propagation occurred at the critical stress-intensity factor was as low as 51.9% and 50.9% of its fracture toughness. Conclusion: After dealing with the method described in this article, both the flexural strength and the crack growth resistance of the HT are increased.

Key words： dental zirconia ceramics sandblasting Weibull statistics flexural strength cyclic fatigue fatigue property

收稿日期: 2017-01-03

基金资助:宁波市自然科学基金资助项目（2016A610147）

通讯作者: 李幼华，主任医师，Email：37895047@qq.com

作者简介: 王梁（1979-），男，山东莱芜人，副主任医师，硕士。

链接本文:

https://xb.wmu.edu.cn/CN/ 或 https://xb.wmu.edu.cn/CN/Y2017/V47/I8/585

[1] VAGKOPOULOU T, KOUTAYAS S O, KOIDIS P, et al.Zirconia in dentistry: Part 1. Discovering the nature of an upcoming bioceramic[J]. Eur J Esthet Dent, 2009, 4(2): 130-151.
[2] MANICONE P F, IOMMETTI P R, RAFFAELLI L. An overview of zirconia ceramics: Basic properties and clinical applications[J]. J Dent, 2007, 35(11): 819-826.
[3] 李红霞, 杜斌, 刘劭晨, 等. 不同表面处理方式对氧化锆与树脂水门汀粘接强度的影响[J]. 口腔颌面修复学杂志, 2015, 16(2): 101-104.
[4] 刘艳, 张祖太, 何敏, 等. 齿科氧化锆表面处理的研究进展[J]. 北京口腔医学, 2015, 23(2): 114-117.
[5] EGILMEZ F, ERGUN G, CEKIC-NAGAS I, et al. Factors affecting the mechanical behavior of Y-TZP[J]. J Mech Behav Biomed Mater, 2014, 37: 78-87.
[6] Pereira P C, Nizzola G C, Tango R N. Effect of sandblasting protocols on flexural strength of Y-TZP ceramic[J]. Dent Mater, 2012, 28(Suppl 1): e31-32.
[7] Pereira P C, Nizzola G C, Silva L H, et al. Influence of sandblasting protocols on flexural strength of Y-TZP ceramic[J]. Dent Mater, 2011, 27(Suppl 1): e69.
[8] Pereira P C, Tango R N. Do the different sandblasting protocols influence on flexural strength of zirconia ceramic [J]. Dent Mater, 2013, 29: e22.
[9] KOSMAC T, OBLAK C, JEVNIKAR P, et al. The effect of surface grinding and sandblasting on flexural strength and reliability of Y-TZP zirconia ceramic[J]. Dent Mater, 1999, 15(6): 426-433.
[10] British Standards Institution. Dentisry-Ceramic materials: ISO6872[S]. London: BSI standards Publication, 2015: 1-40.
[11] EGILMEZ F, ERGUN G, CEKIC-NAGAS I. Factors affecting the mechanical behavior of Y-TZP[J]. Mech Behav Biomed Mater, 2014, 37: 78-87.
[12] 龚旭, 赵信义, 张春宝, 等. 2种牙科氧化锆陶瓷材料的弯曲强度可靠性和亚临界裂纹扩展研究[J]. 实用口腔医学杂志, 2015, 31(5): 611-614.
[13] WEIBULL B W. A statistical distribution function of wide applicability[J]. J Appl Mech, 1951, 18(3): 293-297.
[14] 王中光. 材料的疲劳[M]. 北京: 国防工业出版社, 1999: 234-240.
[15] MUNZ D, FETT T. Ceramics: Mechanical properties, failure behavior, materials selection[M]. Berlin: Spinger-Cerlag, 1999: 167-172.
[16] EWART L, SURESH S. Crack propagation in ceramics under cyclic loads[J]. J Mater Sci, 1987, 22(4): 1173-1192.
[17] WANG H, ABOUSHELIB M N, FEILZER A J. Strength influencing variables on CAD/CAM zirconia frameworks[J].Dent Mater, 2008, 24(5): 633-638.
[18] 龚江宏. 脆性固体断裂力学[M]. 北京: 高等教育出版社,2010: 241-292.
[19] DAUSKARDT R H, MARSHALL D B, RITCHIE R O. Cyclic fatigue-crack propagation in magnesia partially stabilized zirconia ceramics[J]. J AM Ceram Soc, 1990, 73(4):893-903.