材料科学
立方氧化锆
断裂(地质)
威布尔分布
万能试验机
复合材料
统计分析
陶瓷
事后
牙科
口腔正畸科
数学
医学
极限抗拉强度
统计
作者
Bogna Stawarczyk,Mutlu Ouml ZCAN,Małgorzata Roos,Albert Trottmann,Christoph H. F. H Auml MMERLE
出处
期刊:Dental Materials Journal
[Japanese Society for Dental Materials and Devices]
日期:2011-01-01
卷期号:30 (4): 554-562
被引量:24
摘要
This study determined the fracture load of zirconia crowns veneered with four overpressed and four layered ceramics after chewing simulation. The veneered zirconia crowns were cemented and subjected to chewing cycling. Subsequently, the specimens were loaded at an angle of 45° in a Universal Testing Machine to determine the fracture load. One-way ANOVA, followed by a post-hoc Scheffé test, t-test and Weibull statistic were performed. Overpressed crowns showed significantly lower fracture load (543–577 N) compared to layered ones (805–1067 N). No statistical difference was found between the fracture loads within the overpressed group. Within the layered groups, LV (1067 N) presented significantly higher results compared to LC (805 N). The mean values of all other groups were not significantly different. Single zirconia crowns veneered with overpressed ceramics exhibited lower fracture load than those of the layered ones after chewing simulation.
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