Effect of coloring and sintering on the translucency and biaxial strength of monolithic zirconia

Şen, Nazmiye; Şermet, I. Bülent; ÇINAR, Şevki

doi:10.1016/j.prosdent.2017.08.013

Cited by 89 publications

(106 citation statements)

References 27 publications

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“…Katana HT has more ytrria and a larger amount of untransformable cubic phase, which is probably the reason for a lower susceptibility to LTD. Moreover, the coloring procedure had no significant effect on the flexural strength of the tested materials, which is consistent with the previous studies [4,27]. According to ISO standard 13356: 2008, aging should be performed using an autoclave at 134°C and 0.2 MPa for 5 h. e zirconia tested should not have more than 25% V m after aging [34].…”

Section: Discussionsupporting

confidence: 86%

“…Limited information is available regarding the effects of coloring procedures on the aging behavior of Y-TZP. Sen et al [27] examined the monolithic zirconia subjected to the coloring liquid application and reported that the coloring procedure did not significantly affect biaxial flexural strength. Kaya [28] produced precolored zirconia blocks using different mixtures of raw zirconia powder and Fe 2 O 3 .…”

Section: Discussionmentioning

confidence: 99%

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Effect of Different Coloring Procedures on the Aging Behavior of Dental Monolithic Zirconia

Agingu

Jiang

Cheng

et al. 2018

Journal of Spectroscopy

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Objective.is study aimed to investigate the effect of different coloring procedures on the aging behavior of dental monolithic zirconia. Methods. Two types of translucent zirconia (SuperfectZir HTS, Aidite; Katana HT, Kuraray) were tested. Bar-shaped specimens with dimensions of 22 × 4 × 2 mm were prepared from uncolored and precolored blocks. Before being sintered, specimens made from uncolored blocks were colored by dipping them into a coloring liquid, whereas the precolored specimens were not treated. e specimens were then divided into 4 subgroups (n � 13) according to the aging conditions (no aging, 134°C/0.2 MPa for 5 h, 134°C/0.2 MPa for 10 h, and 134°C/0.2 MPa for 20 h). e flexural strength of the specimens was tested with the 4-point flexure. e crystalline phase composition of the specimens was analyzed by XRD. e subsurface microstructure of the fractured specimens was examined by using a SEM. e data were statistically analyzed using 3-way ANOVA and Tukey's test (α � 0.05). Results. Significant differences were found in the flexural strength between the two zirconia materials tested (P < 0.001). Aging and coloring procedures showed no significant effect on the flexural strength of the zirconia. Aging and coloring procedures significantly affected the t→m transformation of the zirconia. e monoclinic phase increased with the aging time. After aging, the precolored specimens showed a significantly higher t→m transformation than the specimens that were dipped in the coloring liquids. After aging for 20 h, the depth of the transformed zone with an irregular surface was approximately 6 µm for SuperfectZir HTS, whereas no detectable transformation zone was observed for Katana HT. Conclusion. Aging and coloring procedures had no significant effects on the flexural strength of the zirconia tested. e coloring procedure had a significant effect on the phase transformation of the zirconia subjected to hydrothermal aging.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Effect of Different Coloring Procedures on the Aging Behavior of Dental Monolithic Zirconia

Agingu

Jiang

Cheng

et al. 2018

Journal of Spectroscopy

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“…Several studies have reported that increasing sintering temperature of 3 mol% yttria‐containing zirconia increases its strength . Studies of 5 mol% yttria‐containing zirconia have reported no effect of sintering temperature on flexural strength …”

Section: Introductionsupporting

confidence: 91%

“…8 Several studies have reported that increasing the sintering temperature of 3 mol% yttriacontaining zirconia has increased its translucency. 10,13,14 Regarding 5 mol% yttria-containing zirconia, there are reports that an increased sintering temperature increases 15 and decreases 7 translucency.…”

mentioning

confidence: 99%

“…6,12 Studies of 5 mol% yttria-containing zirconia have reported no effect of sintering temperature on flexural strength. 7,15 The aim of this study is to determine whether high-speed sintering of several different brands of dental zirconia in a commercially available induction furnace that will have any effect on clinically relevant properties of the material. This study will compare one commercially available brand of zirconia that has been formulated for high-speed sintering (Katana STML Block; Kuraray Noritake, Tokyo, Japan), one commercially available brand of zirconia not recommended for highspeed sintering (Prettau Anterior; Zirkonzahn, Gais, Italy), zirconia fabricated from raw 5 mol% yttria-stabilized zirconia powder (Zpex Smile, Tosoh, Tokyo, Japan), and lithium disilicate (IPS e.max CAD; Ivoclar Vivadent, Schaan, Lichtenstein).…”

mentioning

confidence: 99%

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Strength and translucency of zirconia after high‐speed sintering

Lawson

Maharishi

2019

J Esthet Restor Dent

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Objectives To compare the strength and translucency of CAD/CAM zirconia blocks, with traditional and high‐speed sintering, to lithium disilicate. Materials and Methods Three zirconia materials (Katana STML Block, Prettau Anterior, and Zpex Smile) were tested with either traditional (7 hours) or high‐speed (18 or 30 minutes in a SpeedFire furnace) sintering. A lithium disilicate material (IPS e.max CAD) was tested as a reference. Three‐point bend flexural strength specimens (16 mm × 4 mm × 1.2 mm, n = 10) were tested on 14‐mm‐separated supports and loaded to failure at 1 mm/min. Specimens (1 mm thick, n = 10) were measured in a Color‐i7 spectrophotometer against a black and white background to calculate translucency parameter. Zirconia specimens were thermally etched and a grain structure was observed with scanning electron microscopy. Data were analyzed with 1‐way ANOVA and Tukey's post hoc analysis (α = 0.05). Results There were significant differences between materials for flexural strength, translucency parameter, and grain size (P < .001). Grains became significantly larger and pores were present when two of the zirconia materials (Prettau Anterior and Zpex Smile) were sintered with a high‐speed sintering program. Conclusions Two of the zirconia materials (Prettau Anterior and Zpex Smile) became less translucent and less strong using a high‐speed sintering program, whereas another (Katana STML Block) was unaffected.

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Comparative assessment of flexural strength of monolithic zirconia with different thicknesses and two sintering techniques

Karbasian,

Fathi,

Givehchian

et al. 2024

Clinical & Exp Dental Res

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ObjectivesThis study aimed to compare the flexural strength of monolithic zirconia with different thicknesses and two sintering techniques.Materials and MethodsThis in vitro, experimental study was conducted on 28 monolithic zirconia discs with 10 mm diameter and 0.5 (n = 14) and 1.2 mm (n = 14) thickness. Each group was divided into two subgroups (n = 7) for fast (60 min) and conventional (120 min) sintering at 1450°C. After sintering, the specimens were thermocycled and their flexural strength was measured by piston‐on‐3‐balls technique in a universal testing machine (0.5 mm/min, 1.2 mm pin diameter). Data were analyzed by the Weibull test, one‐way analysis of variance, and Tukey's test (α = .05).ResultsThe flexural strength of specimens with 1.2 mm thickness was significantly higher than that of specimens with 0.5 mm thickness (p < .05). The flexural strength of 1.2 mm/120‐min group was slightly, but not significantly, higher than that of 1.2 mm/60‐min group (p > .05). The flexural strength of 0.5 mm/120‐min group was slightly, but not significantly, higher than that of 0.5 mm/60‐min group (p > .05).ConclusionThe increase in thickness of monolithic zirconia increases its flexural strength; however, increasing the sintering time appears to have no significant effect on the flexural strength of monolithic zirconia.

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Effect of coloring and sintering on the translucency and biaxial strength of monolithic zirconia

Cited by 89 publications

References 27 publications

Effect of Different Coloring Procedures on the Aging Behavior of Dental Monolithic Zirconia

Effect of Different Coloring Procedures on the Aging Behavior of Dental Monolithic Zirconia

Strength and translucency of zirconia after high‐speed sintering

Comparative assessment of flexural strength of monolithic zirconia with different thicknesses and two sintering techniques

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