A new silica-infiltrated Y-TZP obtained by the sol-gel method

Campos, Tiago Moreira Bastos; Ramos, Nathália de Carvalho; Machado, João Paulo Barros; Bottino, Marco Antônio; Souza, Rodrigo Othávio de Assunção e; Melo, Renata Marques de

doi:10.1016/j.jdent.2016.03.004

Cited by 44 publications

(46 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase in structural homogeneity of silica infiltrated zirconia though sol-gel method had already been shown [27] which was confirmed by the low variability in the fatigue limit results found in the present study. We suggest that the silica infiltrated in the grooves produced by the milling process [27] and a lower tendence of zirconia for suffering degradation in water [44] explain the differences in the fatigue behavior of SSG and CTL specimens.…”

Section: Discussionsupporting

confidence: 91%

“…Glass- and silica-infiltrated zirconia ceramics were tested in previous studies in different geometric forms: plates, beams, discs and single crowns [6,21,27]. The specimen geometry may influence stress concentration [37], and the use of geometric forms similar to those used in the mouth for in vitro studies is important for its clinical relevance and predition [6,38].…”

Section: Discussionmentioning

confidence: 99%

“…During the sintering process, silica on the zirconia surface can suffer a reaction in its solid state, resulting in zirconia silicate, without the amorphous glassy phase. Therefore, silica is not in its free form, the layer of ZrSiO 4 formed on the 3Y-TZP surface reduces the number of flaws [27], and, consequently, the possibility of these defects, when subjected to mechanical stress, becomes the initial crack point in the ceramic material.…”

Section: Discussionmentioning

confidence: 99%

“…FDPs underwent silica infiltration by the sol-gel method, according to Campos TM et al [27]. The silicic acid was obtained by the passing of sodium metasilicate (Na 2 SiO 3 ·5H 2 O) aqueous solution (10% m/m) through an ion-exchanging resin (IR120 – Rohm and Haas).…”

Section: Methodsmentioning

confidence: 99%

“…Another FGM processing route is silica infiltration of zirconia by a sol-gel method, which allows for the modification of the zirconia surface by reactive diffusion of silica into zirconia during the sintering process. This method does not require additional thermal treatment and forms a zirconium silicate, which affects the mechanical properties of zirconia and improves its structural homogeneity [27]. …”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses

et al. 2017

View full text Add to dashboard Cite

Objective This study evaluated the effects of two grading zirconia techniques on the fatigue limit of 3-unit fixed dental prostheses (FDPs). Methods Presintered blocks of 3Y-TZP were milled to obtain sixty-nine 3-unit FDPs, which were divided into three groups (n = 23). The control group (CTL) was sintered and glazed following manufacturer’s instructuctions. The two experimental groups presintered FDPs received a surface silica/glass infiltration treatment before the sintering process. Silica sol-gel group (SSG) was graded by the sol-gel processing route, while the glass-zirconia-glass group (GZG) was graded by an enameling technique. Graded groups did not receive a glaze layer after sintering. All FDPs were then luted with a dual-curing resin cement on composite abutments, embedded in polyurethane and stored in water for five days. The initial load of the fatigue test was calculated based on the results of the monotonic testing applied on three specimens of each group. To determine the fatigue limit, 20 samples of each group were subjected to staircase testing (100,000 cycles/5 Hz). Results The fatigue limits (in Newtons) were CTL = 1607.27, SSG = 1824.31, and GZG = 2006.57, and the Dixon and Mood test indicated statistically significant differences among groups (95% confidence interval). Significance The infiltration of silica and glass on bulk zirconia, by two different grading methods, increased the fatigue limits of monolithic zirconia FDPs.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses

et al. 2017

View full text Add to dashboard Cite

show abstract

Silica coating followed by heat‐treatment of MDP‐primer for resin bond stability to yttria‐stabilized zirconia polycrystals

et al. 2018

View full text Add to dashboard Cite

This study evaluated the influence of silica coating, primer type and its heat treatment on bond strength durability between resin cement and an yttrium-stabilized polycrystalline tetragonal zirconia (Y-TZP). Eighty (80) Y-TZP blocks were allocated into 16 groups considering four factors: silica coating (without and with); type of primer (RelyX Ceramic Primer, a silane-based primer; Single Bond Universal, a universal MDP-based primer); heat treatment of the primer (without and with); aging (without and with). After zirconia treatments, resin cement cylinders (RelyX ARC) (n = 20; N = 320) were built. Half of the samples were tested after 24 h, and another half were subjected to aging (thermocycling 5-55°C/5.000, and storage in water for 6 months). Shear bond strength test and failure analysis were performed. Bond strength data were submitted to four-way ANOVA and Tukey test (p = 0.05). All factors were statistically significant (p < 0.001) for bond strength (MPa): silica coating (7.3 ± 5.9) > no-treatment (3.6 ± 4.3); universal primer (6.7 ± 4.8) > silane (4.2 ± 5.8); heat-treatment (6.5 ± 6.3) > no-heating (4.4 ± 4.3); no-aging (8.2 ± 5) > aging (2.7 ± 4.4). Tukey test revealed that the association of silica coating + universal primer + heat-treatment promoted higher and stable resin bond strength. Silica coating, universal adhesive application and heat treatment improve/increase durability and bond strength of zirconia. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2018.

show abstract

Development, characterization, and biological study of bioglass coatings 45S5 and BioK on zirconia implant surfaces

Avelino,

Alvares Sobral‐Silva,

Thim

et al. 2024

J Biomed Mater Res

View full text Add to dashboard Cite

Zirconia implants are gaining attention as a viable alternative to titanium implants due to their comparable osseointegration development, improved soft tissue adaptation, and enhanced aesthetics. An encouraging avenue for improving zirconia implant properties involves the potential application of bioactive coatings to their surfaces. These coatings have shown potential for inducing hydroxyapatite formation, crucial for bone proliferation, and improving implant mechanical properties. This study aimed to evaluate the effect of coating zirconia implants with two bioactive glasses, 45S5 and BioK, on osteogenesis in vitro and osseointegration in vivo. Zirconia samples and implants were prepared using Zpex zirconia powder and blocks, respectively. The samples were divided into three groups: polished zirconia (ZRC), zirconia coated with 45S5 bioglass (Z + 45S5), and zirconia coated with BioK glass (Z + BK). Coatings were applied using a brush and sintered at 1200°C. Chemical analysis of the coatings was carried out using x‐ray diffraction and Fourier Transform Infrared Spectroscopy. Surface topography and roughness were characterized using scanning electron microscopy and a roughness meter. In vitro experiments used mesenchymal cells from Wistar rat femurs, and the coated zirconia implants were found to promote cell viability, protein synthesis, alkaline phosphatase activity, and mineralization, indicating enhanced osteogenesis. In vivo experiments with 18 rats showed positive results for bone formation and osseointegration through histological and histomorphometric analysis and a push‐out test. The findings indicate that bioactive glass coatings have the potential to improve cell differentiation, bone formation, and osseointegration in zirconia implants.

show abstract

A new silica-infiltrated Y-TZP obtained by the sol-gel method

Cited by 44 publications

References 30 publications

Effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses

Effects of two grading techniques of zirconia material on the fatigue limit of full-contour 3-unit fixed dental prostheses

Silica coating followed by heat‐treatment of MDP‐primer for resin bond stability to yttria‐stabilized zirconia polycrystals

Development, characterization, and biological study of bioglass coatings 45S5 and BioK on zirconia implant surfaces

Contact Info

Product

Resources

About