Weibull analysis and flexural strength of hot-pressed core and veneered ceramic structures

Bona, Álvaro Della; Anusavice, Kenneth J.; Dehoff, P.H.

doi:10.1016/s0109-5641(03)00010-1

Cited by 197 publications

(65 citation statements)

References 21 publications

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“…NanoZR showed a high Weibull modulus (m) and demonstrated a low variability ranging from 20.67 to 21.82. A high Weibull modulus defines better clinical reliability of the materials 26,28. The characteristic strength of LM group was significantly higher than that of the LC and LT groups ( P <.001).…”

Section: Discussionmentioning

confidence: 91%

Biaxial flexural strength and phase transformation of Ce-TZP/Al₂O₃and Y-TZP core materials after thermocycling and mechanical loading

et al. 2014

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PURPOSEThe purpose of the present study was to evaluate the effect of thermocycling and mechanical loading on the biaxial flexural strength and the phase transformation of one Ce-TZP/Al2O3 and two Y-TZP core materials.MATERIALS AND METHODSThirty disc-shaped specimens were obtained from each material. The specimens were randomly divided into three groups (control, thermocycled, and mechanically loaded). Thermocycling was subjected in distilled water for 10000 cycles. Mechanical loading was subjected with 200 N loads at a frequency of 2 Hz for 100000 times. The mean biaxial flexural strength and phase transformation of the specimens were tested. The Weibull modulus, characteristic strength, 10%, 5% and 1% probabilities of failure were calculated using the biaxial flexural strength data.RESULTSThe characteristic strengths of Ce-TZP/Al2O3 specimens were significantly higher in all groups compared with the other tested materials (P<.001). Statistical results of X-ray diffraction showed that thermocycling and mechanical loading did not affect the monoclinic phase content of the materials. According to Raman spectroscopy results, at the same point and the same material, mechanical loading significantly affected the phase fraction of all materials (P<.05).CONCLUSIONIt was concluded that thermocycling and mechanical loading did not show negative effect on the mean biaxial strength of the tested materials.

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Section: Discussionmentioning

confidence: 91%

Biaxial flexural strength and phase transformation of Ce-TZP/Al₂O₃and Y-TZP core materials after thermocycling and mechanical loading

et al. 2014

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“…When the framework material is under tension, in layered structures, the fracture strength values tend to be similar to the ones obtained by the monolithic specimens made of framework material [7, 19]. On the other side, the framework material has a small influence in the fracture strength of these structures when the porcelain is subjected to tension [20].…”

Section: Introductionmentioning

confidence: 87%

“…For instance, the slow crack growth behavior can be affected by the interface fracture energy and the difference between the elastic modulus of the coupling materials [4–7]. In addition, a mismatch in the coefficient of thermal expansion (CTE) between the ceramics produces residual stresses near the interface that could influence the fracture mode of these laminates [8–12].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, a mismatch in the coefficient of thermal expansion (CTE) between the ceramics produces residual stresses near the interface that could influence the fracture mode of these laminates [8–12]. Other factors that are also related to the performance of these structures are the mechanical properties of the material subjected to maximum tensile stress during loading and the thickness ratio between layers [2, 5, 7, 13–16]. Hsueh et al (2008) [17] used finite element analysis (FEA) and reported that the location of the maximum tensile stress changes with the thickness ratio between the veneering and framework materials.…”

Section: Introductionmentioning

confidence: 99%

“…Investigations showed that the material subjected to tension during flexural testing and the interaction between the materials in ceramic structures have a significant effect in the strength and fracture mode of layered structures [7, 14, 16, 18]. When the framework material is under tension, in layered structures, the fracture strength values tend to be similar to the ones obtained by the monolithic specimens made of framework material [7, 19].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Flexural strength and failure modes of layered ceramic structures

Borba¹,

Araújo²,

Lima³

et al. 2011

Dental Materials

131

100

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Objective to evaluate the effect of the specimen design on the flexural strength (σf) and failure mode of ceramic structures, testing the hypothesis that the ceramic material under tension controls the mechanical performance of the structure. Methods Three ceramics used as framework materials for fixed partial dentures (YZ - Vita In-Ceram YZ; IZ - Vita In-Ceram Zirconia; AL - Vita In-Ceram AL) and two veneering porcelains (VM7 and VM9) were studied. Bar-shaped specimens were produced in three different designs (n=10): monolithic, two layers (porcelain-framework) and three layers (TRI) (porcelain-framework-porcelain). Specimens were tested for three-point flexural strength at 1 MPa/s in 37°C artificial saliva. For bi-layered design, the specimens were tested in both conditions: with porcelain (PT) or framework ceramic (FT) layer under tension. Fracture surfaces were analyzed using stereomicroscope and scanning electron microscopy (SEM). Young’s modulus (E) and Poisson’s ratio (ν) were determined using ultrasonic pulse-echo method. Results were statistically analyzed by Kruskal-Wallis and Student-Newman-Keuls tests. Results Except for VM7 and VM9, significant differences were observed for E values among the materials. YZ showed the highest ν value followed by IZ and AL. YZ presented the highest σf. There was no statistical difference in the σf value between IZ and IZ-FT and between AL and AL-FT. σf values for YZ-PT, IZ-PT, IZ-TRI, AL-PT, AL-TRI were similar to the results obtained for VM7 and VM9. Two types of fracture mode were identified: total and partial failure. Significance The mechanical performance of the specimens was determined by the material under tension during testing, confirming the study hypothesis.

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Qualitative and Quantitative Fractographic Analysis of All‐Ceramic Fixed Partial Dentures

Borba

Yoshimura²,

Griggs

et al. 2012

Ceramic Transactions Series

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Weibull analysis and flexural strength of hot-pressed core and veneered ceramic structures

Cited by 197 publications

References 21 publications

Biaxial flexural strength and phase transformation of Ce-TZP/Al₂O₃and Y-TZP core materials after thermocycling and mechanical loading

Biaxial flexural strength and phase transformation of Ce-TZP/Al₂O₃and Y-TZP core materials after thermocycling and mechanical loading

Flexural strength and failure modes of layered ceramic structures

Qualitative and Quantitative Fractographic Analysis of All‐Ceramic Fixed Partial Dentures

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Weibull analysis and flexural strength of hot-pressed core and veneered ceramic structures

Cited by 197 publications

References 21 publications

Biaxial flexural strength and phase transformation of Ce-TZP/Al2O3and Y-TZP core materials after thermocycling and mechanical loading

Biaxial flexural strength and phase transformation of Ce-TZP/Al2O3and Y-TZP core materials after thermocycling and mechanical loading

Flexural strength and failure modes of layered ceramic structures

Qualitative and Quantitative Fractographic Analysis of All‐Ceramic Fixed Partial Dentures

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Product

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Biaxial flexural strength and phase transformation of Ce-TZP/Al₂O₃and Y-TZP core materials after thermocycling and mechanical loading

Biaxial flexural strength and phase transformation of Ce-TZP/Al₂O₃and Y-TZP core materials after thermocycling and mechanical loading