scholarly journals Fluoride-Releasing Restorative Materials: The Effect of a Resinous Coat on Ion Release

2020 ◽  
Vol 54 (4) ◽  
pp. 371-381
Author(s):  
Katarina Kelić ◽  
Matej Par ◽  
Kristina Peroš ◽  
Ivana Šutej ◽  
Zrinka Tarle
Keyword(s):  
Glass Ionomer Cement ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Adhesive Systems ◽  
Ion Release ◽  
Dental Adhesives ◽  
Ph Changes ◽  
Ph Values ◽  
Restorative Materials ◽  
Ionomer Cement

Objective: To determine the effect of two adhesive systems and a glass ionomer coating resin on fluoride release and concurrent pH changes over a period of 168 days. Material and methods: Four restorative materials were investigated: a giomer Beautiful II, an “alkasite” material Cention, a conventional composite Filtek Z250, and a glass ionomer cement Fuji IX Extra. Light-cured composite specimens were coated using G-aenial Bond and Clearfil Universal Bond Quick. Glass ionomer specimens were coated using GC Fuji Coat LC. Uncoated specimens were used as references. Quantitative fluoride release and pH changes were measured after 1 h, 24 h, 2 days, 7 days, 28 days, 84 days, and 168 days. Results: The cumulative fluoride release after 168 days increased for uncoated specimens in the following order: Filtek Z250 < Beautifil II < Cention < Fuji IX Extra. A comparatively lower fluoride release was measured for the composites coated with Clearfil Universal Bond Quick, with cumulative values after 168 days increasing in the following order: Filtek Z250 < Beautifil II < Cention. The composites coated with G-aenial Bond showed lower fluoride release compared to the uncoated specimens, with cumulative values increasing in the following order: Filtek Z250 < Beautifil II < Cention. The composites coated with G-aenial Bond showed pH values in the acidic range (4.4- 5.7) after 1 h and 24 h. Conclusion: Fluoride release varied among the investigated restorative materials and depended on the use of dental adhesives and coatings. The pH of all materials, coating types and time points varied.

scholarly journals Biophysical and Fluoride Release Properties of a Resin Modified Glass Ionomer Cement Enriched with Bioactive Glasses

Symmetry ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 494
Author(s):  
Ascensión Vicente ◽  
Francisco Javier Rodríguez-Lozano ◽  
Yolanda Martínez-Beneyto ◽  
María Jaimez ◽  
Julia Guerrero-Gironés ◽  
...  
Keyword(s):  
Cell Migration ◽  
Bond Strength ◽  
Glass Ionomer Cement ◽  
Fluoride Ion ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Ion Release ◽  
Bioactive Glasses ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

The aim of this study was to evaluate the bond strength, microleakage, cytotoxicity, cell migration and fluoride ion release over time from a resin-modified glass-ionomer cement (RMGIC) enriched with bioactive glasses (BAGs) and a nanohybrid restorative polymer resin agent used as adhesion material in the cemented brackets. One hundred and twenty bovine lower incisors were divided into three groups: (Transbond Plus Self Etching Primer (TSEP)/Transbond XT (TXT), TSEP/ACTIVA, orthophosphoric acid gel/ACTIVA) and brackets were bonded. A bond strength test and microleakage test were applied. A fluoride release test was applied after 60 days for the TXT and ACTIVA group. To evaluate cytotoxicity and cell migration, a cell viability and scratch migration assay were done for each group. p values < 0.05 were considered significant. Regarding bond strength and microleakage test, no significant differences were found between TSEP/TXT and TSEP/ACTIVA. At 6.4 pH, ACTIVA showed a higher degree of fluoride ion release, which increased with acid pH (3.5), with a maximum fluoride secretion at 30 days. MTT assay revealed that TXT reduces the viability of gingival cells with significant differences (p < 0.001) compared to the untreated cells (control group). ACTIVA provides optimal adhesive and microfiltration properties, releases substantial amounts of fluoride ions in both acid and neutral media, and its biocompatibility is greater than that of traditional composite resin adhesive systems.

scholarly journals Fluoride release from conventional, resin-modified and hybrid glass ionomer cements

2018 ◽  
Vol 65 (4) ◽  
pp. 187-194
Author(s):  
Maja Ležaja Zebić ◽  
Nikola Jakovljević ◽  
Vesna Miletić
Keyword(s):  
Correlation Analysis ◽  
Pearson Correlation ◽  
Glass Ionomer Cement ◽  
Fluoride Concentration ◽  
Base Material ◽  
Time Interval ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Restorative Materials ◽  
Ionomer Cement

Summary Introduction The aim of the study was to quantify and compare fluoride release from four different glass ionomer cement products (GICs). Materials and Methods Standardized disk-shaped samples (5x2mm; n=5/group) of GIC restorative materials: conventional (Fuji IX, GC Corp., Japan), resin-modified (Fuji II LC, GC) and hybrid glass ionomer cement (Equia Forte, GC) and a conventional GIC liner/base material (Alfagal, Galenika, Serbia) were tested for fluoride release up to 21 days postsetting. Each sample was immersed in 5 mL of fresh deionized water during each time interval. Universal microhybrid composite (Filtek Z250, 3M EPSE, USA) and adhesive (Adper Single Bond, 3M ESPE) were used as negative controls. Fluoride release was measured using an F-selective electrode (Cole-Parmer, USA) and an ion meter (Oakton 700, Cole-Parmer, USA). Data were statistically analyzed using one-way ANOVA, regression and correlation analysis at 0.05. Results The highest total fluoride release was measured from Alfagal (386±61 ppm/g), and significantly less from Equia (188±29 ppm/g), Fuji IX (143±11 ppm/g) and Fuji II LC (104±14 ppm/g) (p < 0.05). All GICs showed the highest fluoride release during the first 24 hours post-setting. After 3 days, fluoride release slowed down reaching a plateau for all materials. Regression and Pearson correlation analysis showed significant inverse relationship between fluoride release and sample mass and density (p<0.001). Conclusion Of the three GICs indicated for use as restorative materials, Equia Forte released the highest fluoride concentration. Fluoride release was material and density dependent, with higher release occurring from lower density GICs.

scholarly journals Evaluating the Mechanical Properties, and Calcium and Fluoride Release of Glass-Ionomer Cement Modified with Chicken Eggshell Powder

2018 ◽  
Vol 6 (3) ◽  
pp. 40
Author(s):  
Gehan Allam ◽  
Ola Abd El-Geleel
Keyword(s):  
Mechanical Properties ◽  
Calcium Release ◽  
Glass Ionomer Cement ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Ion Release ◽  
Chicken Eggshell ◽  
Group A ◽  
Group B ◽  
Ionomer Cement

The aim of this study was to test the effect of adding chicken eggshell powder (CESP) to conventional glass-ionomer cement (GIC) on its mechanical properties, and fluoride and calcium release. CESP was added with proportions of 3% and 5% by weight to the powder component of conventional glass-ionomer cement. The specimens were categorized into group A: GIC without CESP; group B: GIC with 3% wt. CESP; and group C: GIC with 5% wt. CESP; there were 12 specimens in each group. Groups B and C showed higher compressive strength values compared to group A. However, microhardness scores were higher in group C compared to groups A and B. As for ion-release results, group B displayed the highest values of fluoride release followed by group C at both 7 and 30 days. Group C showed the highest amount of calcium release followed by both groups B and C at 7 days, while at 30 days, groups A and B showed higher calcium release compared to group C. The mechanical properties of conventional glass-ionomer restorative material were enhanced by the addition of CESP. Moreover, fluoride and calcium release were not compromised by adding CESP.

scholarly journals Commercially Available Fluoride-Releasing Restorative Materials: A Review and a Proposal for Classification

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2313
Author(s):  
Philippe Francois ◽  
Vincent Fouquet ◽  
Jean-Pierre Attal ◽  
Elisabeth Dursun
Keyword(s):  
Smart Materials ◽  
Resin Composite ◽  
Dental Materials ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Ion Release ◽  
Comprehensive Review ◽  
Family Names ◽  
Restorative Materials ◽  
Ionomer Cement

Resin composite and glass ionomer cement (GIC) are the most commonly used dental materials to perform direct restorations. Both have specific characteristics that explain their popularity and their limits. More than 20 years ago, the first attempt (followed by others) to combine the advantages of these two families was performed with compomers, but it was not very successful. Recently, new formulations (also called ‘smart materials’) with claimed ion release properties have been proposed under different family names, but there are few studies on them and explanations of their chemistries. This comprehensive review aims to gather the compositions; the setting reactions; the mechanical, self-adhesive, and potential bulk-fill properties; and the ion release abilities of the large existing families of fluoride-releasing restorative materials and the new restorative materials to precisely describe their characteristics, their eventual bioactivities, and classify them for an improved understanding of these materials. Based on this work, the whole GIC family, including resin-modified and highly viscous formulations, was found to be bioactive. Cention N (Ivoclar Vivadent, AG, Schaan, Lietschentein) is the first commercially available bioactive resin composite.

scholarly journals Fluoride Release from Restorative Materials

2011 ◽  
Vol 22 (5) ◽  
pp. 355-358 ◽  
Author(s):  
Gabriela Romanini Basso ◽  
Álvaro Della Bona ◽  
Delton Luiz Gobbi ◽  
Dileta Cecchetti
Keyword(s):  
Standard Deviation ◽  
Liquid Membrane ◽  
Glass Ionomer Cement ◽  
Negative Control ◽  
The Other ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Restorative Materials ◽  
Ionomer Cement

The aim of this study was to evaluate in vitro fluoride (F) release from 4 restorative materials (3M ESPE): Ketak Molar Easymix [KME - conventional glass ionomer cement (GIC)]; Rely-X luting 2 [RL2 - resin-modified GIC (RMGIC)]; Vitremer (VIT- RMGIC); and Filtek Z250 [Z250 - negative control]. Disc-shaped specimens were fabricated according to the manufacturer’s instructions and placed into 10 mL of reverse osmosis water at 37°C until the analyses were done using a liquid membrane for selective F ion electrode (Orion 710). F release was evaluated every 6 h in the first day and thereafter daily during 28 days (d). The results were analyzed statistically by two-way ANOVA and Tukey’s test (α=0.05). Mean F release and standard deviation values (in ppm) were: KME: 6 h- 0.34 ± 0.04; 24 h- 1.22 ± 0.30; 7 d- 0.29 ± 0.09; 14 d- 0.20 ± 0.04; 28 d- 0.16 ± 0.01; RL2: 6 h- 2.46 ± 0.48; 24 h-12.33 ± 2.93; 7 d- 1.37 ± 0.38; 14 d- 0.80 ± 0.13; 28 d- 0.80 ± 0.21; VIT: 6 h- 0.98 ± 0.35; 24 h- 4.35 ± 1.22; 7 d- 0.66 ± 0.23; 14 d- 0.40 ± 0.07; 28 d- 0.39 ± 0.08; Z250: 6 h- 0.029 ± 0.001; 24 h- 0.024 ± 0.009; 7 d- 0.023 ± 0.004; 14 d- 0.025 ± 0.001; 28 d- 0.028 ± 0.001. RL2 RMGIC released more F than the other materials in all periods. The greatest release of F occurred in the first 24 h.

scholarly journals A COMPARATIVE EVALUATION OF FLUORIDE RELEASE, RECHARGE AND RERELEASING ABILITIES OF THREE DIFFERENT RESTORATIVE MATERIALS - AN INVITRO STUDY

2020 ◽  
pp. 1-4
Author(s):  
C Sunil KUMAR ◽  
Obula Reddy ◽  
S. Satta Prasad ◽  
N. Vamsee Krishna ◽  
S. Sunil Kumar ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
Fluoride Concentration ◽  
Deionized Water ◽  
Control Group ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Carious Lesions ◽  
Restorative Materials ◽  
Group B ◽  
Ionomer Cement

INTRODUCTION: The most important property of Fluoride is anti-cariogenic property which aids in remineralization of incipient carious lesions in enamel thereby inhibiting enamel demineralization i.e. it helps in arresting or reversal of incipient enamel lesions. A prolonged exposure of incipient carious lesions to uoride in the aqueous phase achieves the cariostatic effect. OBJECTIVES: The aim of the present study is to evaluate the amount of uoride released by three different Restorative Materialsi.e. Glass Ionomer Cement, Resin Modied Glass Ionomer Cement, Cention on 1st,7th and 15th day followed by Recharge and Re-release after recharging with various Flouride applications. MATERIALS AND METHODOLOGY: Fifteen Disk-shaped specimens for each group (8.5 mm diameter; 3 mm thickness) were prepared from three different restorative materials using cylindrical Teon molds according to manufacturer's instructions. The specimens in each individual group were incubated in a 95% relative humid environment at 37°C for 24 hours. Specimens of each group were immersed in 20 ml deionized water in plastic bottles and stored in the incubator at 37°C, Fluoride concentration was measured using a UV Spectrophotometer after 1st ,7th & 15 days. The samples from each group were now divided into: 3 Sub Groups of ve each. Sub Group A - Control group – No topical uoride application. Sub Group B - The samples were recharged with 2% Neutral Sodium Fluoride solution for 4 minutes and washed with copious deionized water for 10 sec and dried on absorbent paper. Sub Group C - The samples were recharged by hand brushing with a Fluoridated brushing Dentifrice for four minutes and then wiped clean with a tissue and rinsed for 10 sec using copious deionized water and dried. Measurement of uoride Re-release is done by UV Spectrophotometer after 1st ,7th and 15thday after recharge.The results were statistically analysed using analysis of variance (one-way ANOVA) and Tukey Kramer multiple comparison tests (p≤0.05). RESULTS: Independent of the observation time period of thestudy the Conventional GIC released the highest amount of uoride followed by RMGIC & CENTION. The initial burst effect was seen with GIC'S but not with RMGIC, CENTION. After topical uoride application uoride re-release was highest in Sub Group B and GIC had a greater recharging ability followed by RMGIC & CENTION. The uoride re-release was greatest on 1st day followed by rapid return tonear exposure levels. CONCLUSION: From the study it was concluded that, the initialFluoride release was highest from Conventional GIC followedby Resin Modied GIC, CENTION. The Fluoride release was high when recharging with professional regime (2%NaF) as compared to home regime (Toothpaste).

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.

Antibacterial glass-ionomer cement restorative materials: A critical review on the current status of extended release formulations

2017 ◽  
Vol 262 ◽  
pp. 317-328 ◽  
Author(s):  
Tahereh Mohammadi Hafshejani ◽  
Ali Zamanian ◽  
Jayarama Reddy Venugopal ◽  
Zahra Rezvani ◽  
Farshid Sefat ◽  
...  
Keyword(s):  
Critical Review ◽  
Extended Release ◽  
Glass Ionomer Cement ◽  
Current Status ◽  
Glass Ionomer ◽  
Restorative Materials ◽  
Extended Release Formulations ◽  
Ionomer Cement

scholarly journals Effects of Powdery Cellulose Nanofiber Addition on the Properties of Glass Ionomer Cement

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3077 ◽  
Author(s):  
Takako Nishimura ◽  
Yukari Shinonaga ◽  
Chikoto Nagaishi ◽  
Rie Imataki ◽  
Michiko Takemura ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Cellulose Nanofibers ◽  
Glass Ionomer Cement ◽  
Chemical Properties ◽  
Fluoride Ion ◽  
Strength Testing ◽  
Glass Ionomer ◽  
Ion Release ◽  
Diametral Tensile Strength ◽  
Ionomer Cement

In this study, we aimed to evaluate the effect of the addition of powdery cellulose nanofibers (CNFs) on the mechanical properties of glass ionomer cement (GIC) without negatively affecting its chemical properties. Commercial GIC was reinforced with powdery CNFs (2–8 wt.%) and characterized in terms of flexural strength, compressive strength, diametral tensile strength, and fluoride-ion release properties. Powdery CNFs and samples subjected to flexural strength testing were observed via scanning electron microscopy. CNF incorporation was found to significantly improve the flexural, compressive, and diametral tensile strengths of GIC, and the corresponding composite was shown to contain fibrillar aggregates of nanofibers interspersed in the GIC matrix. No significant differences in fluoride-ion release properties were observed between the control GIC and the CNF-GIC composite. Thus, powdery CNFs were concluded to be a promising GIC reinforcement agent.

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