A porous lithium silicate ceramic separator prepared from diatomite: Effect of LiOH on pore structure, composition and electrochemical properties of the separator

2021 ◽  
Vol 482 ◽  
pp. 228945
Author(s):  
Dongni Li ◽  
Kuo Yang ◽  
Ye Li ◽  
Fangfei Li ◽  
Bing Xue
Keyword(s):  
Pore Structure ◽  
Electrochemical Properties ◽  
Lithium Silicate ◽  
Silicate Ceramic

In vitro wear of a zirconium-reinforced lithium silicate ceramic against different restorative materials

2019 ◽  
Vol 100 ◽  
pp. 103403
Author(s):  
Larissa Marcia Martins Alves ◽  
Lisseth Patricia Claudio Contreras ◽  
Tiago Moreira Bastos Campos ◽  
Marco Antonio Bottino ◽  
Luiz Felipe Valandro ◽  
...  
Keyword(s):  
Lithium Silicate ◽  
Restorative Materials ◽  
Silicate Ceramic

Liquefaction pitch-based porous carbon: Preparation and relationship between pore structure and electrochemical properties

2022 ◽  
Vol 122 ◽  
pp. 108824
Author(s):  
Yang Liu ◽  
Guochun Yan ◽  
Jianli Wang ◽  
Weimin Lu ◽  
Yi Li ◽  
...  
Keyword(s):  
Pore Structure ◽  
Electrochemical Properties ◽  
Porous Carbon

Survival probability of zirconia-reinforced lithium silicate ceramic: Effect of surface condition and fatigue test load profile

2020 ◽  
Vol 36 (6) ◽  
pp. 808-815 ◽  
Author(s):  
Amanda Maria de Oliveira Dal Piva ◽  
João Paulo Mendes Tribst ◽  
Andressa Borin Venturini ◽  
Lilian Costa Anami ◽  
Estevam Augusto Bonfante ◽  
...  
Keyword(s):  
Fatigue Test ◽  
Survival Probability ◽  
Surface Condition ◽  
Lithium Silicate ◽  
Test Load ◽  
Load Profile ◽  
Silicate Ceramic ◽  
Effect Of Surface

scholarly journals Fracture Resistance of Zirconia-Reinforced Lithium Silicate Ceramic Crowns Cemented with Conventional or Adhesive Systems: An In Vitro Study

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2012
Author(s):  
Gianmaria D’Addazio ◽  
Manlio Santilli ◽  
Marco Lorenzo Rollo ◽  
Paolo Cardelli ◽  
Imena Rexhepi ◽  
...  
Keyword(s):  
Mechanical Test ◽  
Testing Machine ◽  
In Vitro Study ◽  
Resin Cement ◽  
Human Tooth ◽  
Lithium Silicate ◽  
Significant Difference ◽  
Aesthetic Characteristics ◽  
Silicate Ceramic

In recent years, Zirconia-reinforced Lithium Silicate ceramic (ZLS), combining lithium-silicate and zirconia features, has shown to have excellent mechanical and aesthetic characteristics. Thus, the aim of this study was to compare the fracture strength of ZLS single crowns cemented with two different cementation techniques. Twenty crowns were realised and cemented on teeth replicas achieved from an extracted premolar human tooth. The samples were divided into two groups of 10 specimens each, Glass-ionomeric cement (GIC) group and Self-Adhesive Resin Cement (ARC) group. The mechanical test was performed using a universal testing machine. The specimens were then evaluated with a scanning electron microscope (SEM) to identify for all crowns and related abutments the pattern of fracture after the breaking point. The data obtained were statistically analysed. The mean fracture toughness values and standard deviations (±SD) were 2227 ± 382 N and 3712 ± 319 N respectively for GIC and ARC groups. In fact, t-test showed a statistically significant difference between the two groups (p < 0.001). Moreover, the SEM results demonstrated portions of abutments still attached to the crown fragments in the ARC group, whilst these were not present in the GIC group. Within the limitations of this study, these results suggest the use of adhesive cementation for ZLS crowns, which significantly increase the compressive strength of ZLS restorations compared to GIC.

Comparison of Bond Strength of Monolithic CAD-CAM Materials to Resin Cement Using Different Surface Treatment Methods

2019 ◽  
Vol 10 (2) ◽  
pp. 120-127
Author(s):  
Sevki Cinar ◽  
Bike Altan ◽  
Gokhan Akgungor
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Surface Treatments ◽  
Resin Cement ◽  
Lithium Silicate ◽  
Treatment Methods ◽  
Cad Cam ◽  
Post Hoc ◽  
Hybrid Ceramic ◽  
Silicate Ceramic

Objective: To compare the bond strength of monolithic CAD-CAM materials to resin cement using different surface treatment methods. Materials and Methods: Lithium disilicate glass ceramic (IPS e-max CAD), zirconia-reinforced lithium silicate ceramic (Vita Suprinity), resin nanoceramic (Lava Ultimate), and hybrid ceramic (Vita Enamic) were used. Five groups of CAD-CAM blocks were treated as follows: control (C), HF etching (HF), HF etching + silanization (HF + S), sandblasting (SB), and sandblasting + silanization (SB + S). After surface treatments, SEM analyses were conducted. Specimens were cemented with self-adhesive resin cement (Theracem) and stored in distilled water at 37°C for 24 h. Shear bond strength (SBS) was measured, and failure types were categorized. Results were analyzed using two-way ANOVA and the post-hoc Tukey test. Results: Statistical analysis revealed significant differences between SBS values obtained for different surface treatments and CAD-CAM block types ( P < .001). Among the CAD-CAM materials, the highest SBS was reported in the HF + S group for Vita Enamic. Although IPS e.max CAD, Vita Suprinity, and Vita Enamic showed higher bond strength when treated with HF + S, Lava Ultimate has the highest bond strength value when treated with SB + S. Conclusions: The bond strength of CAD-CAM materials was influenced by surface treatment. Additionally, silanization significantly improved the bond strength of all materials except Lava Ultimate.

Radiation-induced effects in neutron- and electron-irradiated lithium silicate ceramic breeder pebbles

2020 ◽  
Vol 540 ◽  
pp. 152347
Author(s):  
Julia M. Leys ◽  
Arturs Zarins ◽  
Janis Cipa ◽  
Larisa Baumane ◽  
Gunta Kizane ◽  
...  
Keyword(s):  
Lithium Silicate ◽  
Radiation Induced ◽  
Silicate Ceramic

Fatigue Behavior of Monolithic Zirconia-Reinforced Lithium Silicate Ceramic Restorations: Effects of Conditionings of the Intaglio Surface and the Resin Cements

2021 ◽  
Author(s):  
F Dalla-Nora ◽  
LF Guilardi ◽  
CP Zucuni ◽  
LF Valandro ◽  
MP Rippe
Keyword(s):  
Fatigue Testing ◽  
Fatigue Behavior ◽  
Silica Coating ◽  
Resin Cement ◽  
Lithium Silicate ◽  
Dihydrogen Phosphate ◽  
Ceramic Surface ◽  
Resin Cements ◽  
Silicate Ceramic ◽  
O 10

SUMMARY Objective: This study assessed the effect of conditioning of the intaglio surface and resin cements on the fatigue behavior of zirconia-reinforced lithium silicate ceramic (ZLS) restorations cemented to a dentin analogue. Methods: ZLS ceramic (Ø=10 mm, thickness=1.5 mm) and dentin analogue (Ø=10 mm, thickness=2.0 mm) discs were produced and allocated according to the study factors, totaling nine study groups: ceramic surface treatment (three levels: hydrofluoric acid etching [HF]; self-etching ceramic primer [EP]; tribochemical silica coating [TBS]) and resin cement (three levels: 10-methacryloyloxydecyl dihydrogen phosphate [nMDP]; MDP–containing conventional resin cement [MDP]; self-adhesive resin cement [SA]). The ceramic bonding surfaces were treated and cemented on the dentin analogue, and all the specimens were aged for 5000 thermal cycles (5°C–55°C) prior to fatigue testing. The stepwise fatigue test (20 Hz frequency) started with a load of 400 N (5000 cycles) followed by steps of 500, 600, and up to 1800 N (step-size: 100 N) at a maximum of 10,000 cycles each step. The specimens were loaded until failure (crack), which was detected by light transillumination and visual inspection at the end of each step. The fatigue failure load and number of cycles for failure data were analyzed by the Kaplan-Meier (log-rank test; α=0.05). Topographic and fractographic analyses were also performed. Results: HF- (973.33–1206.67 N) and EP- (866.67–1066.67 N) treated specimens failed at statistically similar loads and higher than TBS (546.67–733.33 N), regardless of the cement used. All the fractographical inspections demonstrated failure as radial crack. Conclusion: The HF and EP treatments promoted better mechanical fatigue behavior of the ceramic restoration, while tribochemical silica coating induced worse fatigue results and should be avoided for treating the ZLS surface prior to bonding.

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