scholarly journals The Effects of Silver, Zinc Oxide, and Titanium Dioxide Nanoparticles Used as Dentin Pretreatments on the Microshear Bond Strength of a Conventional Glass Ionomer Cement to Dentin

2020 ◽  
Vol Volume 15 ◽  
pp. 4755-4762
Author(s):  
Zahra Jowkar ◽  
Zahra Fattah ◽  
Saeedreza Ghanbarian ◽  
Fereshteh Shafiei
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Bond Strength ◽  
Titanium Dioxide Nanoparticles ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Microshear Bond Strength ◽  
Ionomer Cement

scholarly journals Microshear Bond Strength of Nanoparticle-Incorporated Conventional and Resin-Modified Glass Ionomer to Caries-Affected Dentin

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Zahra Fattah ◽  
Zahra Jowkar ◽  
Safoora Rezaeian
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Bond Strength ◽  
Glass Ionomer Cement ◽  
The Other ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Different Types ◽  
Microshear Bond Strength ◽  
Ionomer Cement

The purpose of this study was to assess the influence of three different types of nanoparticles (silver (SNPs), titanium dioxide (TNPs), and zinc oxide (ZNPs)) on the microshear bond strength of conventional glass ionomer cement (CGIC) and resin-modified glass ionomer cement based on whether CGIC or RMGIC is used with four subgroups (based on the incorporation of SNPs, ZNPs, and TNPs in addition to a control subgroup) (n = 12) as follows: CGIC, CGIC + TNP, CGIC + ZNP, CGIC + SNP, RMGIC, RMGIC + TNP, RMGIC + ZNP, and RMGIC + SNP. After 24 hours, the μSBS of specimens was tested and the obtained data were analyzed using two-way ANOVA and Tukey’s HSD test. The obtained results showed that the incorporation of TNPs in two glass ionomers was not statistically significant compared with the control subgroups ( p  > 0.05). In the first group, the highest and lowest mean μSBS were, respectively, observed in the CGIC + SNP subgroup and CGIC + ZNP subgroup. In the second group, RMGIC + ZNP and RMGIC + SNP, respectively, showed the highest and lowest mean μSBS compared to the other subgroups. According to the results, it can be concluded that TNPs can be incorporated into both CGIC and RMGIC without compromising the bond strength of glass ionomers. SNPs and ZNPs can be, respectively, added to CGICs and RMGICs to improve the bond strength of the restoration.

Applied Research Glass Ionomer Cement with TiO2 Nanoparticles in Orthodontic Treatment

2021 ◽  
Vol 21 (2) ◽  
pp. 1032-1041
Author(s):  
Jiajie Ren ◽  
Zhen Du ◽  
Jiang Lin
Keyword(s):  
Compressive Strength ◽  
Titanium Dioxide ◽  
Antibacterial Effect ◽  
Titanium Dioxide Nanoparticles ◽  
Glass Ionomer Cement ◽  
Antibacterial Properties ◽  
Surface Hardness ◽  
Glass Ionomer ◽  
Adhesion Properties ◽  
Ionomer Cement

In orthodontics treatment, scholars have tried to introduce nano antibacterial materials into the materials used in orthodontics to reduce the occurrence of enamel demineralization, caries and periodontitis. The experiment investigated the effect of adding titanium dioxide nanoparticles in different proportions on the flexural strength, compressive strength, surface hardness, tribological properties, adhesion properties, fluorine release properties and antibacterial properties of glass ionomer cement. The effect of water cement on orthodontics, the experiment added different proportions of titanium dioxide nanoparticles to traditional glass ion cement, which greatly improved the mechanical strength of glass ion cement, and significantly improved the antibacterial effect of glass ion cement, bending strength, compressive strength and surface hardness. The addition of titanium dioxide nanoparticles produced a significant antibacterial effect on Streptococcus mutants. Nano-TiO2 glass ionomer cement has a significant effect on orthodontics, and the damage to patients’ teeth is significantly lower, which is worthy of clinical popularization.

scholarly journals Mechanical Properties of High-Viscosity Glass Ionomer Cement and Nanoparticle Glass Carbomer

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Isabel Cristina Olegário ◽  
Anna Paula Vieira Ferreira Prado Malagrana ◽  
Sabrina Sun Ha Kim ◽  
Daniela Hesse ◽  
Tamara Kerber Tedesco ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Glass Ionomer Cement ◽  
High Viscosity ◽  
Knoop Hardness ◽  
Glass Ionomer ◽  
Bonding Performance ◽  
Microshear Bond Strength ◽  
Ionomer Cement

Introduction. The lack of evidence regarding the best available material for restoring occlusal-proximal cavities in primary teeth leads to the development of new restorative material, with nanoparticles, in order to enhance mechanical properties, resulting in increased restoration longevity.Aim.To evaluate the Knoop hardness and bond strength of nanoparticles material glass carbomer cement (CAR) and high-viscosity glass ionomer cement (GIC) in sound and caries-affected dentin.Methods.Forty bovine incisors were selected and assigned into four groups (n=10): SGIC, sound dentin and GIC; SCAR, sound dentin and CAR; CGIC, caries-affected dentin and GIC; and CCAR, caries-affected dentin and CAR. All groups were submitted to microshear bond strength (MPa). Knoop hardness was also performed. Bond strength values were subjected to two-way ANOVA and Tukey test. Knoop hardness data were subjected to one-way ANOVA.Results.GIC presented higher Knoop hardness (P<0.001) and bond strength (P=0.027) than CAR. Also, both materials showed better performance in sound than in caries-affected substrates (P=0.001). The interaction between factors was not statistically different (P=0.494).Conclusion.Despite nanoparticles, CAR shows inferior performance as compared to GIC for the two properties testedin vitro. Moreover, sound dentin results in better bonding performance of both restorative materials evaluated.

scholarly journals To Evaluate Shear Bond Strength of Resin Composite to Theracal Lc, Biodentine, and Resin–Modified Glass Ionomer Cement and Mode of Fracture: An In Vitro Study

2020 ◽  
Vol 8 (02) ◽  
pp. 49-54
Author(s):  
Salil Mehra ◽  
Ashu K. Gupta ◽  
Bhanu Pratap Singh ◽  
Mandeep Kaur ◽  
Ashwath Kumar
Keyword(s):  
Statistical Analysis ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Glass Ionomer Cement ◽  
Bonding Agent ◽  
Glass Ionomer ◽  
Universal Adhesive ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

Abstract Introduction The aim of the current study was to evaluate shear bond strength of resin composite bonded to Theracal LC, Biodentine, and resin-modified glass ionomer cement (RMGIC) using universal adhesive and mode of fracture. Materials and Methods A total of 50 caries-free maxillary and mandibular molars extracted were taken; occlusal cavities were prepared, mounted in acrylic blocks, and divided into five groups based on the liner used. Group 1: Biodentine liner placed into the cavity and bonding agent and resin composite applied after 12 minutes. Group 2: Biodentine liner placed into the cavity and bonding agent and resin composite applied after 14 days. Group 3: RMGIC liner placed into the cavity and bonding agent and resin composite applied immediately. Group 4: RMGIC liner placed into the cavity and bonding agent and resin composite applied after 7 days. Group 5: Theracal LC liner placed into the cavity and bonding agent and resin composite applied immediately. Each sample was bonded to resin composite using universal adhesive. Shear bond strength analysis was performed at a cross-head speed of 0.1 mm/min. Statistical Analysis  Statistical analysis was performed with one-way analysis of variance and posthoc Bonferroni test using SPSS version 22.0. Results and Conclusion Biodentine liner when bonded immediately to resin composite showed minimum shear bond strength. RMGIC when bonded to resin composite after 7 days showed maximum shear bond strength. Mode of fracture was predominantly cohesive in groups having Biodentine and Theracal LC as liner.

scholarly journals Bond strength of orthodontic light-cured resin-modified glass ionomer cement

2010 ◽  
Vol 33 (2) ◽  
pp. 180-184 ◽  
Author(s):  
H. Y. Cheng ◽  
C. H. Chen ◽  
C. L. Li ◽  
H. H. Tsai ◽  
T. H. Chou ◽  
...  
Keyword(s):  
Bond Strength ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

scholarly journals Marginal Leakage of Endodontic Temporary Restorative Materials around Access Cavities Prepared with Pre-Endodontic Composite Build-Up: An In Vitro Study

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1700
Author(s):  
Atsushi Kameyama ◽  
Aoi Saito ◽  
Akiko Haruyama ◽  
Tomoaki Komada ◽  
Setsuko Sugiyama ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Resin Composite ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Restorative Material ◽  
Glass Ionomer ◽  
Zinc Oxide Eugenol ◽  
Restorative Materials ◽  
Ionomer Cement

This study aimed to examine the marginal seal between various commercial temporary restorative materials and exposed dentin/built-up composite. Sixty bovine incisors were cut above the cemento-enamel junction, and half of the dentin was removed to form a step, which was built up using flowable resin composite. The root canals were irrigated, filled with calcium hydroxide, and sealed using one of six temporary sealing materials (hydraulic temporary restorative material, temporary stopping material, zinc oxide eugenol cement, glass-ionomer cement, auto-cured resin-based temporary restorative material, and light-cured resin-based temporary restorative material) (n = 10 for each material). The samples were thermocycled 500 times and immersed in an aqueous solution of methylene blue. After 2 days, they were cut along the long axis of the tooth and the depth of dye penetration was measured at the dentin side and the built-up composite side. For the margins of the pre-endodontic resin composite build-up, the two resin-based temporary restorative materials showed excellent sealing. Hydraulic temporary restorative material had a moderate sealing effect, but the sealing effect of both zinc oxide eugenol cement and glass-ionomer cement was poorer.

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