Effect of Low-Concentration Hydrofluoric Acid Etching on Shear Bond Strength and Biaxial Flexural Strength after Thermocycling

Kang, You‐Jung; Shin, Young Goo; Kim, Jeehwan

doi:10.3390/ma13061409

Cited by 13 publications

(15 citation statements)

References 40 publications

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“…HE specimens showed significantly higher SBS values than SB or CT specimens ( p < 0.05). These results are consistent with the findings of Kang et al [ 32 ]. With Maxcem Elite, HE specimens showed a markedly (810%) higher adhesive strength than CT specimens, as well as a 105% higher adhesive strength than SB specimens.…”

Section: Discussionsupporting

confidence: 94%

Effect of 9% Hydrofluoric Acid Gel Hot-Etching Surface Treatment on Shear Bond Strength of Resin Cements to Zirconia Ceramics

Kim

Cho²,

Lee³

et al. 2022

Medicina

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Background and Objectives: There is no consensus regarding the surface treatment method for achieving optimal bonding strength between zirconia and resin cements. We evaluated the effect of hot-etching with 9% hydrofluoric acid (HF) gel using the Zirconia Etchant Cloud System on zirconia surfaces and the consequent shear bond strength (SBS) of different resin cements to such surface-treated zirconia ceramics. Materials and Methods: Forty-five zirconia specimens were randomly assigned to surface-treatment groups (n = 15/group): no treatment (control, CT); sandblasting with 110-μm Al2O3 at an air pressure of 1 bar for 10 s (SB); hot-etching with 9% HF gel (HE). Post-treatment, specimens were examined using scanning electron microscopy (SEM) and surface roughness (SR) analysis. After treatment, self-adhesive resin cements (Maxcem Elite, MAZIC Cem, RelyX U200, 3M ESPE: Maplewood, MN, USA) were bonded to zirconia specimens, which were stored in distilled water at 37 °C for 24 h. All specimens were then subjected to SBS testing, using a universal testing machine, until failure. Data were analyzed using one-way analysis of variance and Tukey’s post hoc test (α = 0.05). Results: In the SEM images, roughness was greater in SB than in HE specimens. Ra and Rt values were highest in SB, followed by HE, and CT specimens. HE specimens showed significantly higher SBS values than CT or SB specimens (p < 0.05). MAZIC Cem cement, with 10-methacryloyloxydcyl dihydrogen phosphate yielded the highest SBS values. Conclusions: Hot-etching with 9% HF gel in a safe shell formed uniformly small, defined holes on the zirconia surface and achieved significantly higher SBS values than sandblasting (p < 0.05). Zirconia prostheses can be bonded micromechanically with resin cement, without the deterioration of properties due to t-m transformation, using chemical acid etching with the Zirconia Etchant Cloud System.

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Section: Discussionsupporting

confidence: 94%

Effect of 9% Hydrofluoric Acid Gel Hot-Etching Surface Treatment on Shear Bond Strength of Resin Cements to Zirconia Ceramics

Kim

Cho²,

Lee³

et al. 2022

Medicina

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“…In this experiment, the zirconia treated by hot etching with two acid solutions was rougher than the sandblasting group, and this experimental finding was consistent with that of Alessio (Casucci et al, 2010). However, the experimental results of You-Jung (Kang et al, 2020) were different. He found that the surface roughness of the zirconia treated with HF hot etching was less than that of the sandblasting group.…”

Section: Surface Roughness (Ra) Valuessupporting

confidence: 78%

“…In recent years, many scholars have begun to try to use HF for the hot etching of zirconia. Kang (Kang et al, 2020) treated zirconia with 9.5% HF at 100 °Cfor 10 min and found that the bond strength of zirconia in this group was significantly higher than that in other groups. Therefore, 37% HCl and 9.5% HF were selected to treat zirconia in this experiment.…”

Section: Discussionmentioning

confidence: 87%

“…The appropriate increase of the roughness has a positive significance for the excellent bond of zirconia. However, You-Jung (Kang et al, 2020) points out that the relationship between roughness and bond strength is not purely linear. When uniform nano-scale pore structure is formed by hot etching, the roughness is lower, but the bond strength is still high.…”

Section: Surface Roughness (Ra) Valuesmentioning

confidence: 99%

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Effect of hot etching with HF on the surface topography and bond strength of zirconia

et al. 2022

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Zirconia has occupied an increasingly important role in oral clinical applications in recent years. However, how to achieve the ideal bonding effect of zirconia is a significant problem that needs to be solved urgently in oral clinics. Hot etching treatment of zirconia is a hot spot of current research, but it is still unclear about the optimal acid solution and the effect of hot etching on the surface topography and bond strength of zirconia. This study evaluated the effect of hot etching with HF and HCl on the surface topography, roughness, crystalline phase, zirconia/resin cement interfacial evaluation and shear bond strength of zirconia. The results showed that the hot etching groups produced completely different topographical changes on the surface of zirconia than the sandblasting group. Obvious interfacial cracks were observed in the sandblasting group. The HF hot etching group achieved the highest roughness values (78.17 ± 4.94 nm) and the highest shear bond strength (25.09 ± 4.09 MPa). Compared with HCl, hot etching with HF could achieve more uniform and dense porous morphology, greater roughness and shear bond strength. Moreover, there were no prominent zirconia/resin cement interfacial cracks and crystal phase transformations on the surface of zirconia.

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“…Similar to the report of Kang et al . [ 28 ] using Al 2 O 3 , in this experiment, the experimental group treated with air-borne abrasion containing SiO 2 showed significantly higher phase transformation than all the experimental groups treated with HF.…”

Section: Discussionmentioning

confidence: 72%

Change of phase transformation and bond strength of Y-TZP with various hydrofluoric acid etching

Lim

et al. 2021

Restor Dent Endod

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Objectives The purpose of this study was to quantify phase transformation after hydrofluoric acid (HF) etching at various concentrations on the surface of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP), and to evaluate changes in bonding strength before and after thermal cycling. Materials and Methods A group whose Y-TZP surface was treated with tribochemical silica abrasion (TS) was used as the control. Y-TZP specimens from each experimental group were etched with 5%, 10%, 20%, and 40% HF solutions at room temperature for 10 minutes. First, to quantify the phase transformation, Y-TZP specimens ( n = 5) treated with TS, 5%, 10%, 20% and 40% HF solutions were subjected to X-ray diffraction. Second, to evaluate the change in bond strength before and after thermal cycling, zirconia primer and MDP-containing resin cement were sequentially applied to the Y-TZP specimen. After 5,000 thermal cycles for half of the Y-TZP specimens, shear bond strength was measured for all experimental groups ( n = 10). Results The monoclinic phase content in the 40% HF-treated group was higher than that of the 5%, 10%, and 20% HF-treated groups, but lower than that of TS-treated group ( p < 0.05). The 40% HF-treated group showed significantly higher bonding strength than the TS, 5%, and 10% HF-treated groups, even after thermal cycling ( p < 0.05). Conclusions Through this experiment, the group treated with SiO 2 containing air-borne abrasion on the Y-TZP surface showed higher phase transformation and higher reduction in bonding strength after thermal cycling compared to the group treated with high concentration HF.

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Effect of Low-Concentration Hydrofluoric Acid Etching on Shear Bond Strength and Biaxial Flexural Strength after Thermocycling

Cited by 13 publications

References 40 publications

Effect of 9% Hydrofluoric Acid Gel Hot-Etching Surface Treatment on Shear Bond Strength of Resin Cements to Zirconia Ceramics

Effect of 9% Hydrofluoric Acid Gel Hot-Etching Surface Treatment on Shear Bond Strength of Resin Cements to Zirconia Ceramics

Effect of hot etching with HF on the surface topography and bond strength of zirconia

Change of phase transformation and bond strength of Y-TZP with various hydrofluoric acid etching

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