Fatigue failure load of an adhesively-cemented lithium disilicate glass-ceramic: Conventional ceramic etching vs etch & prime one-step primer.
Fatigue failure load of an adhesively-cemented lithium disilicate glass-ceramic: Conventional ceramic etching vs etch & prime one-step primer.
复制标题
胶结二硅酸锂玻璃陶瓷的疲劳破坏载荷：传统陶瓷蚀刻与蚀刻
DOI：
10.1016/j.dental.2018.04.012
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
L. Valandro
中科院分区：
文献类型：
--
作者：
M. Scherer;C. Prochnow;A. B. Venturini;G. Pereira;T. Burgo;M. Rippe;L. Valandro
目的 评估不同微晶玻璃表面处理和老化对粘合到牙本质模拟材料上的二硅酸锂微晶玻璃疲劳破坏载荷的影响。方法制备一百二十（120）个圆盘状二硅酸锂标本（Ø = 10 mm，厚度 = 1.5 mm），并随机分为 6 组（n = 20），考虑 2 个研究因素：3 个水平的“表面处理” （SIL — 仅硅烷涂覆；HF5+SIL — 5% 氢氟酸蚀刻和硅烷涂覆；ME&P — 使用一步陶瓷底漆蚀刻），以及 2 个级别的“存储”（基线 — 存储 7 天；老化 — 存储 90 天 + 12,000 次热循环）。按照制造商的说明，将陶瓷盘粘合到牙本质类似材料盘（直径 = 10 毫米，厚度 = 2.0 毫米）上。疲劳失效载荷通过阶梯法确定（250,000 次循环；20 Hz；初始载荷 = 1050 N [平均失效载荷的 70%]；步长 = 52.5 N [初始载荷的 5%]）。还进行了微观形态、断口和原子力显微镜分析。通过单向方差分析、Bonferroni 和独立样本 t 检验对疲劳失效载荷数据进行评估。结果 HF5+SIL 在两种条件（基线和老化）下均呈现较高的疲劳失效载荷； ME&P 呈现中间平均值，而 SIL 组表现最差。老化后，所有组的疲劳性能均出现统计上显着的下降。 意义 对于粘合二硅酸锂陶瓷，先涂氢氟酸再涂硅烷显示出最佳的疲劳性能。衰老对所有测试组的疲劳表现都有负面影响。
ObjectivesTo evaluate the effect of different glass-ceramic surface treatments and aging on the fatigue failure load of a lithium disilicate glass-ceramic adhesively cemented to a dentin analogue material.MethodsOne hundred and twenty (120) disc-shaped lithium disilicate specimens (Ø = 10 mm, thickness = 1.5 mm) were produced and randomly allocated (n = 20) into 6 groups, considering 2 study factors: “surface treatment” in 3 levels (SIL—silane application only; HF5+SIL—5% hydrofluoric acid etching and silane application; ME&P—etching with an one-step ceramic primer), and “storage” in 2 levels (baseline—storage for 7 days; aging—storage for 90 days + 12,000 thermal cycles). Ceramic discs were adhesively cemented to discs of a dentin analogue material (Ø = 10 mm, thickness = 2.0 mm) following the manufacturers’ instructions. The fatigue failure load was determined by the staircase approach (250,000 cycles; 20 Hz; initial load = 1050 N [∼70% of mean load-to-failure]; step size = 52.5 N [5% of initial load]). Micro-morphologic, fractographic, and atomic force microscope analysis were also performed. Fatigue failure load data were evaluated by one-way ANOVA, Bonferroni and t-tests for independent samples.ResultsHF5+SIL presented higher fatigue failure load in both conditions (baseline and aging); ME&P presented intermediary mean values, while the SIL group presented the worst performance. All groups had a statistically significant decrease in the fatigue performance after aging.SignificanceHydrofluoric acid followed by silane application showed the best fatigue performance for an adhesively-cemented lithium disilicate ceramic. Aging negatively influenced the fatigue performance for all tested groups.
DOI：
10.1002/jbm.b.30852
发表时间：
2008-01-01
影响因子：
3.4
作者：
Huang, Min;Thompson, V. P.;Soboyejo, W. O.
通讯作者：
Soboyejo, W. O.
氧化锆材料的两种分级技术对全轮廓三单元固定假牙疲劳极限的影响。
DOI：
10.1016/j.dental.2016.12.010
发表时间：
2017
期刊：
Dental materials : official publication of the Academy of Dental Materials
影响因子：
--
作者：
Villefort,ReginaFurbino;Amaral,Marina;Pereira,GabrielKalilRocha;Campos,TiagoMoreiraBastos;Zhang,Yu;Bottino,MarcoAntonio;Valandro,LuizFelipe;deMelo,RenataMarques
通讯作者：
deMelo,RenataMarques