Chong Kok-Heng, Chai John
Department of Biologic and Material Science, Division of Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor 48109-1078, USA.
Int J Prosthodont. 2003 Sep-Oct;16(5):487-92.
The probability of failure under flexural load of veneered specimens of a unidirectional glass fiber-reinforced composite (FibreKor/Sculpture), a bidirectional glass fiber-reinforced composite (Vectris/Targis), a glass-infiltrated alumina (In-Ceram Alumina/Vita alpha), and a zirconia-reinforced glass-infiltrated alumina (In-Ceram Zirconia/Vita alpha) was investigated; a metal-ceramic (PG200/Vita omega) system served as a control.
Ten uniform beams of the veneered core materials were fabricated for each system and subjected to a three-point bending test. The data were analyzed using the Weibull method. The failure load of specimens at a 10% probability of failure (B10 load) was compared. The mode of failure was analyzed.
The B10 load of the systems investigated was not significantly different from that of the metal-ceramic system. FibreKor possessed significantly higher B10 load than Vectris, In-Ceram Alumina, and In-Ceram Zirconia. The B10 strength loads of Vectris, In-Ceram Alumina, and In-Ceram Zirconia were not significantly different from one another.
The probability of FibreKor to fracture under a flexural load was significantly lower than that of Vectris, In-Ceram Alumina, or In-Ceram Zirconia.
研究单向玻璃纤维增强复合材料（FibreKor/Sculpture）、双向玻璃纤维增强复合材料（Vectris/Targis）、玻璃渗透氧化铝（In-Ceram Alumina/Vita alpha）和氧化锆增强玻璃渗透氧化铝（In-Ceram Zirconia/Vita alpha）的贴面试件在弯曲载荷下的失效概率；以金属陶瓷（PG200/Vita omega）系统作为对照。
为每个系统制作10根均匀的贴面芯材梁，并进行三点弯曲试验。使用威布尔方法分析数据。比较失效概率为10%时试件的失效载荷（B10载荷）。分析失效模式。
所研究系统的B10载荷与金属陶瓷系统的B10载荷无显著差异。FibreKor的B10载荷显著高于Vectris、In-Ceram Alumina和In-Ceram Zirconia。Vectris、In-Ceram Alumina和In-Ceram Zirconia的B10强度载荷彼此无显著差异。
FibreKor在弯曲载荷下断裂的概率显著低于Vectris、In-Ceram Alumina或In-Ceram Zirconia。
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