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Fracture Toughness of Dental

In this section, the effects of chemical strengthening using ion exchange by paste method on the hardness and fracture toughness of dental porcelains with different microstmctures are shown. Table 1 shows descriptions of five porcelain powders used in this study, two recommended to be used as veneering materials for alumina cores (V and Ob) and three recommended for porcelain fused-to-metal restorations (C, D, and B), containing wide variation of leucite fraction (0 to 22 vol%). [Pg.173]

Another work also observed beneficial effects of applying ion exchange (with K-containing compound at 450°C for 30 min) to increase the fracture toughness of dental porcelains. For eight dental porcelains, X increased between 39% and 116%, but no significant differences in hardness values were observed [51]. [Pg.176]

Yoshimura HN, Cesar PF, Miranda Jr WG, Gonzaga CC, Okada CY, Goldenstein H. Fracture toughness of dental porcelains evaluated by IF, SCF, and SEPB methods. Journal of the American Ceramic Society 2005 88(6) 1680-1683. [Pg.189]

Cesar PF, Gonzaga CC, Miranda Jr WG, Yoshimura HN. Effect of ion exchange on hardness and fracture toughness of dental porcelains. Journal of Biomedical Materials Research Part B - Applied Biomaterials 2007 83(2) 538-545. [Pg.192]

The ceramic phase can be the reinforcing material, the matrix material or both. The incorporation of high strength fibers increases the mechanical strength of the composites while maintaining the bioactivity of the material. In the case of glass doped materials, the fracture toughness of the material increases dramatically and renders materials suitable for dental implantation and hip replacement... [Pg.48]

J. B. Quinn, G. D. Quinn, V. Sundar, Fracture Toughness of Veneering Ceramics for Porcelain Fused to Metal (PFM) and Zlrconia Dental Restorative Material, J. Res. NIST, 115... [Pg.222]

Flexural strength and fracture toughness are clinically more significant than compressive strength. The flexural strength of a glass-ionomer cement can reach 39 MPa after 24 hours (Pearson Atkinson, 1991) which is a much higher value than that attained by any dental silicate cement. [Pg.149]

Lloyd, C. H. Adamson, M. (1987). The development of fracture toughness and fracture strength in posterior restorative materials. Dental Materials, 3, 225-31. [Pg.185]

A number of mechanical properties have been studied that may affect the clinical success of dental composite restorative materials. Among these are diametral tensile strength (DTS), flexural strength, fracture toughness, elastic modulus, hardness, and fatigue resistance. The mechanical properties should approximate those of tooth structure [183], but correlation of clinical success to any of these properties is limited. [Pg.205]

Alumina is a well-known bioinert ceramic material which can be used in total hip prosthesis and dental implants since it exhibits good biocompatibility, strength, and excellent corrosion resistance.70,71 The application of alumina has some limitations due to poor fracture toughness. The incorporation of ductile phase may lead to the... [Pg.279]

M. Guazzato, M. Albakry, S. P. Ringer, and M.V. Swain, Strength, fracture toughness and microstructure of a selection of all-ceramic materials. Part 2. Zirconia-based dental ceramics. Dent. Mater., 20,449-56 (2004). [Pg.411]

Figure 7. Optical micrograph of a Vickers hardness impression and the radial/median cracks generated on the corners of impression on the polished surface of a dental porcelain (a), and schematic image showing the dimensions a and c used to calculate the hardness, H V, and fracture toughness, by indentation fracture (IF) method... Figure 7. Optical micrograph of a Vickers hardness impression and the radial/median cracks generated on the corners of impression on the polished surface of a dental porcelain (a), and schematic image showing the dimensions a and c used to calculate the hardness, H V, and fracture toughness, by indentation fracture (IF) method...
Figure 8. Fracture toughness, Kj, (a), and Vickers hardness, HV (b), of dental porcelains before and after ion exchange (IE) process (inparenthesis the vol% of leucite crystal). Data from [47]... Figure 8. Fracture toughness, Kj, (a), and Vickers hardness, HV (b), of dental porcelains before and after ion exchange (IE) process (inparenthesis the vol% of leucite crystal). Data from [47]...
Figure 12. Biaxial flexural strength, Op and fracture toughness, Kj of UST dental porcelain before and after ion exchange (IE) at different temperature. In parenthesis is the temperature of IE relative to the glass transition temperature (Tg = 575 C). Data from [57]... Figure 12. Biaxial flexural strength, Op and fracture toughness, Kj of UST dental porcelain before and after ion exchange (IE) at different temperature. In parenthesis is the temperature of IE relative to the glass transition temperature (Tg = 575 C). Data from [57]...
Gonzaga CC, Okada CY, Cesar PF, Miranda Jr WG, Yoshimura HN. Effect of processing induced particle alignment on the fracture toughness and fracture behavior of multiphase dental ceramics. Dental Materials 2009 25(11) 1293-1301. [Pg.189]

Cesar PF. Fracture toughness and microstructure of dental porcelains. Doctoral thesis. University of Sao Paulo 2002. [Pg.190]

Cesar PF, Yoshimura HN, Miranda Jr WG, Okada CY. Correlation between fracture toughness and leucite content in dental porcelains. Journal of Dentistry 2005 33(9) 721-729. [Pg.192]

M. Albakry, M. Guazzato, and M. V. Swain, Fracture Toughness and Hardness Evaluation of Three Pressable All-Ceramic Dental Materials,./ Dent., 31, 181 -88 (2003). [Pg.87]

See other pages where Fracture Toughness of Dental is mentioned: [Pg.171]    [Pg.87]    [Pg.154]    [Pg.170]    [Pg.287]    [Pg.162]    [Pg.320]    [Pg.158]    [Pg.160]    [Pg.322]    [Pg.329]    [Pg.3]    [Pg.162]    [Pg.165]    [Pg.166]    [Pg.167]    [Pg.172]    [Pg.176]    [Pg.177]    [Pg.178]    [Pg.180]    [Pg.188]    [Pg.793]    [Pg.473]    [Pg.58]    [Pg.516]    [Pg.293]    [Pg.301]    [Pg.626]    [Pg.352]   


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