Fatigue strengths of particulate filler composites reinforced with fibers.
The aim of this study was to evaluate the dynamic fatigue strengths at 10(5) cycles and the strains of particulate filler composite resins with and without reinforcing fibers. An UHMWPE (Ribbond), a polyaromatic polyamide fiber (Fibreflex), and three glass fibers (GlasSpan, FibreKor, Vectris Frame) were used to reinforce the particulate filler composite resins. The fatigue properties were measured in three-point bending mode using a servohydraulic universal testing machine at a frequency of 5 Hz, until failure occurred or 10(5) cycles had been completed. The fatigue strengths at 10(5) cycles were determined by the staircase method. The fractured aspects of specimens were evaluated by an optical and scanning electron microscope. The fatigue strengths of particulate filler composite resins were 49-57 MPa, and those of fiber-reinforced were 90-209 MPa. Unidirectional glass fibers showed higher reinforcing effects on the fatigue strengths of composite resins. The strain of UHMWPE-reinforced composite was largest.
Department of Dental Biomaterials, College of Dentistry, Wonkwang University, ShinYong-dong, Iksan-city, Jeonbuk, Korea. baejimy@wonkwang.ac.kr
Ji-Myung
JM
Bae
Kyoung-Nam
KN
Kim
Masayuki
M
Hattori
Koji
K
Hasegawa
Masao
M
Yoshinari
Eiji
E
Kawada
Yutaka
Y
Oda
D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D019245:Compressive Strength; D003799:Dental Stress Analysis; D004548:Elasticity; D005898:Glass; D008422:Materials Testing; D009757:Nylons; D010316:Particle Size; D018583:Pliability; D011095:Polyethylenes; D013314:Stress, Mechanical
D003188:Composite Resins; D009757:Nylons; D011095:Polyethylenes; C009753:fiberglass; C111601:ultra-high molecular weight polyethylene