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This study was performed to evaluate the fracture strength of the dental zirconia veneering ceramics for zirconia ceramic core. Six commercial zirconia veneering ceramics were used in this study, namely E-Max(Ivoclar vivadent, Inc, Liechtenstein), Creation ZI(KLEMA Dental produckte GmbH, Austria), Cercon ceram kiss(Degudent,GmbH, Hanau-Wolfgang, Germany), Triceram(Dentaurum, Ispringen, Germany), Zirkonzahn(Zirkonzahn GmbH, Italy),Zirmax(Alpadent, korea). All samples were prepared according to the relevant instructions of manufacture. Disc specimens were prepared to the final dimensions of 17 mm in diameter and 1.5 mm in thickness. The biaxial flexure strength test was conducted using a ball-on-three-ball method. All specimens were tested in a moisture-free environment.
Average flexural strengths were analyzed with Weibull analysis and one-way analysis of variance(ANOVA). Significant differences were founded between the mean flexural strength values of five commercials zirconia veneering ceramics and the other. The flexural strengths and Weibull modulus were similar to those of five groups E-Max(EM), Creation ZI(CR),Cercon ceram kiss(CE), Triceram(TR), Zirkonzahn(ZI) with the exception of Zirmax(ZM). The biaxial flexural strength from Cercon ceram kiss(CE) was higher than those of other groups. Fracture analysis showed similar results for these five groups.
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참고문헌 (21)
참고문헌 신청
Albakry M / 2003 / Fracture toughness and hardness evaluation of three pressable all-ceramic dental materials / J Dent 3 (3) : 181 ~ 188
AndrR / 2007 / Fatigue of zirconia under cyclic loading in water and its implications for the design of dental bridges / Dent Mater 23 (1) : 106 ~ 114
Ban S / 1990 / Inflence of test method on failure stress of brittle dental materials / J Dent Res 69 (12) : 1791 ~ 1799
Ban S / 1992 / Effect of loading conditions on bi-axial flexure strength of dental cements / Dent Mater 8 (2) : 100 ~ 104
De Jager N / 2006 / The influence of design parameters on the FEA-determined stress distribution in CAD/CAM produced all-ceramic dental crowns / Dent Mater 21 (3) : 242 ~ 251
AndrR / 2007 / Fatigue of zirconia under cyclic loading in water and its implications for the design of dental bridges / Dent Mater 23 (1) : 106 ~ 114
Ban S / 1990 / Inflence of test method on failure stress of brittle dental materials / J Dent Res 69 (12) : 1791 ~ 1799
Ban S / 1992 / Effect of loading conditions on bi-axial flexure strength of dental cements / Dent Mater 8 (2) : 100 ~ 104
De Jager N / 2006 / The influence of design parameters on the FEA-determined stress distribution in CAD/CAM produced all-ceramic dental crowns / Dent Mater 21 (3) : 242 ~ 251
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