Probability of failure of veneered glass fiber-reinforced composites and glass-infiltrated alumina with or without zirconia reinforcement.
OBJECTIVE
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.


METHODS
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.


RESULTS
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.


CONCLUSIONS
The probability of FibreKor to fracture under a flexural load was significantly lower than that of Vectris, In-Ceram Alumina, or In-Ceram Zirconia.
Chong
Kok-Heng
KH
Department of Biologic and Material Science, Division of Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor 48109-1078, USA. kchong@umich.edu
Chai
John
J
D000537:Aluminum Oxide / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D003801:Dental Veneers; D005898:Glass / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D016876:Metal Ceramic Alloys / Q000737:chemistry; D018583:Pliability; D011336:Probability; D012823:Silicate Cement / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D016474:Weight-Bearing; D015040:Zirconium / Q000737:chemistry*
D003188:Composite Resins; C113550:FiberKor, sculpture; D005899:Glass Ionomer Cements; D016876:Metal Ceramic Alloys; C111282:dental polyglass; C009753:fiberglass; D003776:Dental Porcelain; D012823:Silicate Cement; C070870:In-Ceram; D015040:Zirconium; D000537:Aluminum Oxide; C028541:zirconium oxide