Effect of Different Surface Treatments on Biaxial Flexural Strength of Yttria-stabilized Tetragonal Zirconia Polycrystal

Jain, Teerthesh; Porwal, Amit; Babu, S. Rajesh; Khan, Zahid A.; Kaur, Chandeep; Jain, Ranu B

doi:10.5005/jp-journals-10024-2260

Cited by 4 publications

(5 citation statements)

References 28 publications

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“…Air abrasion with 50 µm and 125 µm AO particles increased the fracture load of 3Y-TZP crowns, but had no influence on their reliability and roughness of the inner occlusal surface, partially accepting the first study hypothesis. This finding is consistent with other studies that reported an increase in the mechanical strength of 3Y-TZP subjected to particle air abrasion 13 - 15 , 20 , 24 .…”

Section: Discussionsupporting

confidence: 93%

Failure behavior of zirconia crowns subjected to air abrasion with different particle sizes

et al. 2023

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This study aimed to investigate the failure behavior of 3 mol.% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) prosthetic crowns air-abraded with aluminum oxide (AO) particles of different sizes. Ninety ceramic premolar crowns were produced with 3Y-TZP frameworks veneered with porcelain. Crowns were randomly divided into three groups, according to the size of the air abrasion AO particles (n = 30): (GC) untreated (control); (G53) 53 µm; (G125) 125 µm. Air abrasion was performed with 0.25 mpa pressure, 10-mm distance, for 10 s. Crowns were adhesively cemented to dentin analog abutments. Specimens were loaded in compression to failure, in 37oC distilled water, using a universal testing machine (n = 30). Fractographic analysis was performed using a stereomicroscope and SEM. The roughness of the crown’s inner surface was evaluated using an optical profilometer (n = 10). Fracture load data were statistically analyzed with Weibull analysis and roughness data with Kruskal-Wallis (α = 0.05). GC had the lowest characteristic fracture load (L0), while G53 and G125 had higher and statistically similar L0 values. The Weibull modulus (m) was similar among groups. The failure modes observed were catastrophic failure and porcelain chipping. There were no differences between the roughness parameters for the experimental groups (p > 0.05). The size of the AO particles did not affect the fracture load and failure mode of 3Y-TZP crowns. Air abrasion with 53 µm and 125 µm particles resulted in a higher fracture load of ceramic crowns than the untreated group while maintaining their reliability and surface characteristics.

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Section: Discussionsupporting

confidence: 93%

Failure behavior of zirconia crowns subjected to air abrasion with different particle sizes

et al. 2023

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“…Biaxial flexural strength was measured for the pre-shaded and the liquid-shaded discs using a universal testing machine (39) because it is a widely used machine in research work. (40) The impact of long-term aging must be assessed with the rise in the usage of monolithic entire contour crowns and fixed partial dentures (41) because it might have an impact on the material's optical and mechanical properties, which directly affect the material's suitability for usage in the future (42) .…”

Section: Discussionmentioning

confidence: 99%

Effect of Different Shading Techniques on Color, Translucency and Flexural Strength of Zirconia Ceramic after Aging

Elbadry

Mohsen²,

Hashem³

2022

Egyptian Dental Journal

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Purpose:The ultimate appearance of all ceramic restorations is significantly influenced by color and translucency. The performance of the restoration is significantly influenced by flexural strength. This study's objective was to assess how various shading methods affected the color, translucency, and flexural strength of monolithic zirconia ceramic as it aged.Materials and Methods: Thirty zirconia discs with a diameter of 12mm and thickness of 1mm were divided into two groups of 15 discs each according to the technique of shading, the first group was constructed from A2 pre-shaded zirconia while the second group was constructed from unshaded zirconia that was shaded by immersion in A2 coloring liquid. Aging was done using acetic acid 4% for both groups. Color and translucency were measured using a spectrophotometer before and after artificial aging. Flexural strength was measured using a universal testing machine before and after aging. Data were collected, tabulated, and statistically analyzed. Results:Color change of both pre-shaded and liquid-shaded zirconia were within the clinically acceptable range (1.7±0.3) and (1.9±0.3) respectively and there was no significant difference in translucency between both groups' P value (0.253). Flexural strength increased from (921.9±73.3) before aging to (1025.1±178.5) after aging with pre-shaded zirconia while it decreased from (938.6±32.7) before aging too (899±54.5) after aging with liquid shaded zirconia but this difference was statistically non-significant. Conclusion:The shading technique had no noticeable effect on color, translucency, or flexural strength before or after aging.

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“…There is a strong likelihood that embedded abrasive grains will react with fired ceramics, which may result in the formation of cracks in the veneering porcelain [ 21 ]. For example, abrasive blasting may affect the mechanical properties of zirconium oxide [ 26 , 27 ]. Too aggressive action may cause an unfavorable transformation from the tetragonal phase to the undesirable monoclinic (t → m) [ 24 , 25 , 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

“…For example, abrasive blasting may affect the mechanical properties of zirconium oxide [ 26 , 27 ]. Too aggressive action may cause an unfavorable transformation from the tetragonal phase to the undesirable monoclinic (t → m) [ 24 , 25 , 26 , 27 , 28 , 29 ]. As the transformation phase increases from the surface of the sample to the entire volume of the sample, microcracks, and residual stresses may develop and decrease the bending force [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sandblasting Parameters and the Type and Hardness of the Material on the Number of Embedded Al2O3 Grains

Śmielak,

Klimek,

Krześniak

2023

Materials

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Background: Is abrasive blasting accompanied by the phenomenon of driving abrasive particles into the conditioned material? Methods: Three hundred and fifteen cylindrical disks of three types of metal alloy (chromium/cobalt, chromium/nickel, titanium, and sintered zirconium dioxide) were divided into four groups (n = 35) and sandblasted at pressures of 0.2, 0.4, or 0.6 MPa with aluminum oxide (Al2O3), grain size 50, 110, or 250 μm. Then, the surface topography was examined using a scanning microscope, and the amount of embedded grain was measured using quantitative metallography. For each group, five samples were randomly selected and subjected to Vickers hardness testing. In the statistical analyses, a three-factor analysis of variance was carried out, considering the type of material, the size of gradation of the abrasive, and the amount of pressure. Results: The smallest amounts of embedded abrasive (2.62) were observed in the ZrO2 treatment, and the largest (38.19) occurred in the treatment of the Ti alloy. An increase in the gradation and the pressure were a systematic increase in the amount of embedded grain. Conclusions: After abrasive blasting, abrasive particles were found on the surface of the materials. The amount of driven abrasive depends on the hardness of the processed material.

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Effect of Different Surface Treatments on Biaxial Flexural Strength of Yttria-stabilized Tetragonal Zirconia Polycrystal

Abstract: No negative effect on biaxial flexural strength was observed; indeed, it increases the biaxial strength. Hence, these surface treatments can be done in routine clinical practice to improve the performance of ceramic restoration.

Cited by 4 publications

References 28 publications

Failure behavior of zirconia crowns subjected to air abrasion with different particle sizes

Failure behavior of zirconia crowns subjected to air abrasion with different particle sizes

Effect of Different Shading Techniques on Color, Translucency and Flexural Strength of Zirconia Ceramic after Aging

Effect of Sandblasting Parameters and the Type and Hardness of the Material on the Number of Embedded Al2O3 Grains

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