Degradation of dental ZrO&lt;Sub&gt;2&lt;/Sub&gt;-based materials after hydrothermal fatigue. Part I: XRD, XRF, and FESEM analyses

Perdigão, Jorge; Pinto, A. M. P.; Fernandes, Francisco Manuel Braz; Laranjeira, Pedro; Veiga, João Pedro

doi:10.4012/dmj.2011-216

Cited by 22 publications

(6 citation statements)

References 37 publications

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“…In a study conducted by Perdigao et al, an increase in the monoclinic phase occurred after thermocycling. This difference can be due to higher thermal cycles and lower yttria content in the aforementioned study, compared to those reported for the current study [ 39 ].…”

Section: Discussioncontrasting

confidence: 66%

The Effect of Bioglass Coating on Microshear Bond Strength of Resin Cement to Zirconia

Nojedehian,

Moezzizadeh,

Abdollahi

et al. 2024

fid

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Objectives: Durable bonding to zirconia is a challenging issue in dentistry. This study aimed to assess the effect of bioglass coating of zirconia on the microshear bond strength of resin cement to zirconia and to study the effect of thermocycling on this bond. Materials and Methods: This in-vitro experimental study was conducted on 60 yttria-stabilized tetragonal zirconia blocks in six groups (N=10) based on surface pretreatment and thermocycling. Surface pretreatments included no treatment control, alumina particle abrasion, and bioglass-coating of zirconia. Resin bonding was performed with Panavia F2.0 cements. Then, half of the specimens underwent a 24-hour incubation in 37°C water, while the other half were subjected to thermocycling (12000 cycles, 5-55°C, 60s for each batch) following the same incubation period. Subsequently, the microshear bond strength of the specimens was measured. Additionally, one block from each group was subjected to scanning electron microscopy and X-ray diffraction. The data were analyzed using Kruskal-Wallis and Mann-Whitney U tests. Results: There was a significant difference between the bond strength values of different groups (P<0.001). Alumina particle abrasion and bioglass coating equally increased the bond strength compared to the untreated control group (P<0.001). Thermocycling caused significant decreases in bond strength in all the groups (P<0.001); however, the bond strength value of the thermocycled bioglass-coated group was significantly higher than that reported for the thermocycled alumina particle abraded group (P=0.015). Conclusion: Despite the decrease in the bond strength values after thermocycling, the long-term efficacy of the bioglass coating of zirconia was promising.

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Section: Discussioncontrasting

confidence: 66%

The Effect of Bioglass Coating on Microshear Bond Strength of Resin Cement to Zirconia

Nojedehian,

Moezzizadeh,

Abdollahi

et al. 2024

fid

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“…In previous reports on the XRF of 3Y-TZP, 4Y-PSZ, and 5Y-PSZ, the primary elements were Zr, Y, and HF, and for Zr, the content concentration was almost the same as in the present study 41) . In addition, it was reported that 3Y-TZP did not show any change, as deduced by comparing the XRF results before and after LTD treatment 42) .…”

Section: Discussionmentioning

confidence: 90%

Effect of low-temperature degradation and sintering protocols on the color of monolithic zirconia crowns with different yttria contents

MIURA,

SHINYA,

KOIZUMI

et al. 2024

Dent. Mater. J.

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This study investigated the effects of low-temperature degradation (LTD) on the L*, a*, and b* values of highly translucent zirconia crowns. Four types of zirconia disks with different yttria contents (IPS e.max ZirCAD LT, IPS e.max ZirCAD MT, IPS e.max ZirCAD MT Multi, IPS e.max ZirCAD Prime, Ivoclar) and two shades (A2 and BL) were used. A crown was manufactured using four types of zirconia and LTD treated. Color measurements were performed, and the color difference (ΔE00) before and after LTD was calculated. The microstructure was determined through X-ray fluorescence and X-ray diffractometry. Highly translucent zirconia crowns showed greater changes in the a* and b* values than in the L* value after LTD, regardless of the shade. The Multi2 crowns exhibited a discernible color change due to the LTD treatment. The X-ray fluorescence results did not reveal any apparent change in the microstructure between sintering programs for all zirconia specimens.

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“…XRD analysis is not precise when the m-phase is less than 5%, and peak identification may be complicated by the background noise. 50 Therefore, the crystalline structure should also be analyzed by using Raman spectroscopy, which is more sensitive than XRD, 51 to…”

Section: Discussionmentioning

confidence: 99%

Effect of femtosecond laser induced surface patterns on the flexural strength of monolithic zirconia

Okutan,

Gundogdu,

Donmez

et al. 2024

J Biomed Mater Res

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To investigate how patterns generated by femtosecond (fs) laser and femtosecond laser power affect the surface roughness (Ra) and biaxial flexural strength (BFS) of monolithic zirconia. Eighty disk‐shaped zirconia specimens were divided into eight subgroups (n = 10): Control (C), airborne‐particle abrasion (APA), 400 mW fs laser (spiral [SP(400)], square [SQ(400)], circular [CI(400)]), and 700 mW fs laser ([SP(700)], [SQ(700)], [CI(700)]). Ra values were calculated by using a surface profilometer. One additional specimen per group was analyzed with scanning electron microscopy and x‐ray diffractometry. BFS values were obtained by using the piston‐on‐3‐ball test. One‐way ANOVA and either Tukey's HSD (BFS) or Tamhane's T2 (Ra) tests were used to evaluate data (α = 0.05). Regardless of the pattern and power, fs laser groups had higher Ra than C and APA, while SP groups had lower Ra than CI and SQ groups (p ≤ 0.004). For each pattern, Ra increased with higher laser power (p < 0.001), while the laser power did not affect the BFS (p ≥ 0.793). CI and SQ groups had lower BFS than the other groups (p ≤ 0.040), whereas SP groups had similar BFS to C and APA (p ≥ 0.430). Fs laser microstructuring with spiral surface pattern increased the Ra without jeopardizing the BFS of zirconia. Thus, this treatment might be an option to roughen tested zirconia.

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Degradation of dental ZrO<Sub>2</Sub>-based materials after hydrothermal fatigue. Part I: XRD, XRF, and FESEM analyses

Cited by 22 publications

References 37 publications

The Effect of Bioglass Coating on Microshear Bond Strength of Resin Cement to Zirconia

The Effect of Bioglass Coating on Microshear Bond Strength of Resin Cement to Zirconia

Effect of low-temperature degradation and sintering protocols on the color of monolithic zirconia crowns with different yttria contents

Effect of femtosecond laser induced surface patterns on the flexural strength of monolithic zirconia

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