scholarly journals Effects of a glass-ionomer cement on the remineralization of occlusal caries: an in situ study

2006 ◽  
Vol 20 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Mônica Tostes Amaral ◽  
Antônio Carlos Guedes-Pinto ◽  
Orlando Chevitarese
Keyword(s):  
Glass Ionomer Cement ◽  
Knoop Hardness ◽  
Glass Ionomer ◽  
In Situ Study ◽  
Group I ◽  
Oral Environment ◽  
Group Ii ◽  
Pits And Fissures ◽  
Ionomer Cement

This work evaluated the remineralization of demineralized enamel of pits and fissures of human third molars sealed with a glass ionomer cement (Fuji IX, GC Corporation - Japan) or with a Bis-GMA sealant (Delton - Dentsply). Ten volunteers participated in this in situ study that consisted of two thirty-day periods using intra-oral devices, with a week’s interval in between. Four experimental treatment procedures and one control were randomly assigned to the volunteers’ specimens: Group I, no treatment, control; Group II, artificial caries process; Group III, same treatment as Group II, but sealed with Delton (Dentsply); Group IV, same treatment as Group II, but sealed with Fuji IX (GC Corporation - Japan); Group V, same treatment as Group II and no sealing. Groups I and II were not submitted to the oral environment and served as controls. After a period of 30 days in the oral environment, the specimens were removed from the devices, embedded in acrylic resin, ground flat and polished. Then, Knoop hardness tests were performed, with a 25 g static load applied for 15 seconds. The measurements were made from the base of the fissure up to an opening of 600 µm, pre-established between the inclines of the cusps. Three indentations were then made, located at 25, 75, and 125 µm in depth from the outer enamel margin and 100 µm apart from each other (Micromet 2003). The Brieger F and Bonferroni’s tests were applied to the measurements. It was concluded that sealing with the glass ionomer cement Fuji IX was capable of making the enamel of pits and fissures more resistant by increasing the value of Knoop hardness.

The Effects of Gic Restorations on Enamel and Dentin Demineralization and Remineralization

1995 ◽  
Vol 9 (4) ◽  
pp. 384-388 ◽  
Author(s):  
J.M. Ten Cate ◽  
M.J. Buus ◽  
J.J.M. Damen
Keyword(s):  
Calcium Uptake ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Mineral Balance ◽  
Oral Environment ◽  
Ph Cycling ◽  
Calcium Loss ◽  
Ionomer Cement

Glass-ionomer cement (GIC) restorations release fluoride after placement in the oral environment. This is assumed to be one of the reasons for the decreased prevalence of secondary caries. In the current studies, the effects of GIC restorations on demineralization and remineralization of enamel and dentin lesions were studied, in an in vitro and an intra-oral model, respectively. The in vitro pH-cycling study revealed that the excessive fluoride release of the freshly placed restorations upset the (commonly observed) mineral balance between the specimens and the de/remineralizing solutions. Anomalous patterns of calcium uptake by the specimens (with GIC) during the demineralization phase and calcium loss during the remineralization phase were observed. This was hypothetically explained from the behavior of a surface coating on the GIC restorations, which was observed with SEM. The intra-oral studies showed, after three months in situ, hypermineralization of dentin close to or in contact with the restoration. It is concluded that the fluoride released from GIC or the decreased permeability as a result of hypermineralization causes lower susceptibility of the dentin of the cavity walls.

scholarly journals PENGARUH PENUND AAN TAHAP PENUMPATAN DENGAN RESIN KOMPOSIT PADA TEKNIK SANDWICH TERHADAP KEKUATAN TARIK PELEKATAN SEMEN IONOMER KACA DAN RESIN KOMPOSIT

2016 ◽  
Vol 1 (1) ◽  
pp. 46
Author(s):  
Yulita Kristanti ◽  
Diatri Nari Ratih
Keyword(s):  
Tensile Strength ◽  
Composite Resin ◽  
Artificial Saliva ◽  
Glass Ionomer Cement ◽  
Filling Material ◽  
Glass Ionomer ◽  
Sandwich Technique ◽  
Group I ◽  
Group Ii ◽  
Ionomer Cement

Sandwich technique, a combination filling technique using composite resin filling material and glass ionomer cement has been widely used. In fact, such a combination filling technique need  ffcf i longer time compare to filling without combination. This research was done in order to know the influence of delayed fill ; ing in sandwich technique using composite resin related to the tensile strength between glass ionomer cement and composite resin.The materials studied consist of 16 samples, that were divided into 4 groups. The first one was used as the control groupt without delaying), while group II-IVwas used as the treating groups. Each group consist of 4 samples. The difference treatment between group II-IVwas the soaking time in the artificial saliva. Group II was soaked into artificial saliva (pH5)for 1 day, group , HI for 7 days, and group IVfor 14 days. The result of this research shows that the diference among the groups involved were very significant, except between group I and group II.The longer the sample was soaked into the artificial saliva, the tensile strength tends to decrease.

Influence of ultrasonic excitation on microhardness of glass ionomer cement

2020 ◽  
Vol 28 (6) ◽  
pp. 587-592
Author(s):  
Navara Tanweer ◽  
Rizwan Jouhar ◽  
Muhammad Adeel Ahmed
Keyword(s):  
Glass Ionomer Cement ◽  
Surface Hardness ◽  
Hardness Test ◽  
Glass Particle ◽  
P Value ◽  
Glass Ionomer ◽  
Group I ◽  
Group Ii ◽  
The Difference ◽  
Ionomer Cement

BACKGROUND: Numerous researchers have attempted to improve the mechanical properties of glass ionomer cement since 1972. In this study, ultrasonic curing treatment was introduced during the mixing of glass ionomer cement (GC Fuji IX) to facilitate intimate mixing, compaction and adaptation of residual glass particle which consequently improves densification of the material. OBJECTIVE: To assess the influence of ultrasonic treatment on the microhardness of glass ionomer cement (GC Fuji IX) and compare it with the conventionally cured method. METHODS: A total of 40 specimens (2 × 2 mm) were fabricated and equally divided into two groups: Group I (conventional curing method) and Group II (ultrasonically cured). For Group II, an ultrasonic scaler was used which provides energy to ensure proper mixing of material without leaving any air bubbles or unmixed particles. Vicker’s hardness test was employed to generate the average microhardness values by making three indentations at different points on each specimen. Statistical Package for Social Sciences (SPSS) Version 17 was used, employing independent samples T test to compare the difference in microhardness values between two curing groups. RESULTS: The average surface hardness value for conventional cured GIC was 62.21 ± 13.61 while ultrasonically cured GIC exhibited a higher mean microhardness value of 66.37 ± 12.83. Additionally, the average microhardness values produced by the two groups showed statistically significant differences (p value < 0.035). CONCLUSION: Ultrasonic excitation treatment leads to intimate mixing and accelerated hardening of glass ionomer cement thereby enhancing its microhardness and reducing early weakness.

scholarly journals Evaluation of marginal fit and microleakage of monolithic zirconia crowns cemented by bio-active and glass ionomer cements: In vitro study

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Radwa Hamdy Aboelenen ◽  
Ashraf Mokhtar ◽  
Hanaa Zaghloul
Keyword(s):  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Marginal Gap ◽  
Marginal Fit ◽  
Group I ◽  
Significant Difference ◽  
Zirconia Crowns ◽  
Monolithic Zirconia ◽  
Ionomer Cement ◽  
Gap Values

Objective: To evaluate the marginal fit and microleakage of monolithic zirconia crowns cemented with bioactive cement (Ceramir) compared to that cemented with glass ionomer cement and to evaluate the effect of thermocycling on marginal fit. Materials and methods: Twenty sound human molar teeth were prepared to receive a monolithic zirconia crowns. Teeth were divided randomly into two equal groups according to the type of luting cement. Group I: glass ionomer cement and group II: Ceramir cement. After cementation, the vertical marginal gap was assessed by using stereomicroscope before and after thermocycling. Twenty equidistant measurement points were taken for each crown. Leakage assessment was carried out using Fuchsin dye penetration followed by digital photography under a stereomicroscope. Data were analyzed by Mann-Whitney U test to compare between the two luting cements. Wilcoxon signed-rank test was used to evaluate the effect of thermocycling on the marginal fit (P ≤ 0.05)
Results: Whether before or after thermocycling, the results showed no significant difference between the marginal gap values of the two tested groups. For both groups, there was a significant increase in marginal gap values after thermocycling. Also, there was no significant difference between leakage scores of the two tested groups. Conclusions: Similarity in the physical properties and chemical composition of the two cements result in a non- significant effect on the vertical marginal fit and the extent of microleakage of translucent zirconia crowns.  Thermocycling had a negative impact on the vertical marginal gap of the two tested luting agents.

Effect of Glass Ionomer Cement and Fluoride Varnish on the Remineralization of Artificial Proximal Caries in Situ.

2009 ◽  
Vol 34 (2) ◽  
pp. 131-134 ◽  
Author(s):  
C Trairatvorakul ◽  
P Techalertpaisarn ◽  
S Siwawut ◽  
A Ingprapankorn
Keyword(s):  
Glass Ionomer Cement ◽  
Control Area ◽  
Fluoride Varnish ◽  
Carious Lesion ◽  
Glass Ionomer ◽  
Lesion Area ◽  
Posterior Teeth ◽  
Proximal Caries ◽  
Ionomer Cement

Objective: To compare the effect of glass ionomer cement (GIC) and fluoride varnish (F-varnish) on artificial proximal caries in situ. Study design: Two 1×3 mm2 enamel slabs, divided into three 1×1 mm2 windows,were prepared from each proximal surface of 18 premolars. Each slab was distributed into a control area,an intact enamel area and a test area. Artificial lesions were created on the control and test areas by immersing in demineralizing solution for 24 hours. The test windows were either applied with GIC or F-varnish and the full slabs inserted into orthodontic brackets as carriers, which were then bonded to the buccal surfaces of the 6 upper posterior teeth of 6 volunteers using non-fluoride dentifrice for 30 days. There was a 1-week washout period in this crossover study. The middle specimens of the three windows were cross-sectioned to analyze the carious lesion area by a polarized light microscope and calculated with Image-Pro plus® software.Results: The average carious lesion area under GIC was significantly less than that under F-varnish(p&lt;0.05). Conclusion: GIC promotes more remineralization of artificial carious lesions on proximal surfaces than F-varnish.

In situ antibiofilm effect of glass-ionomer cement containing dimethylaminododecyl methacrylate

2015 ◽  
Vol 31 (8) ◽  
pp. 992-1002 ◽  
Author(s):  
Jin Feng ◽  
Lei Cheng ◽  
Xuedong Zhou ◽  
Hockin H.K. Xu ◽  
Michael D. Weir ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Ionomer Cement

scholarly journals Novel Nanotechnology of TiO2Improves Physical-Chemical and Biological Properties of Glass Ionomer Cement

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Daniela Dellosso Cibim ◽  
Miki Taketomi Saito ◽  
Priscila Alves Giovani ◽  
Ana Flávia Sanches Borges ◽  
Vanessa Gallego Arias Pecorari ◽  
...  
Keyword(s):  
Cell Morphology ◽  
Glass Ionomer Cement ◽  
Chemical Properties ◽  
Biological Properties ◽  
Knoop Hardness ◽  
Fluoride Release ◽  
Glass Ionomer ◽  
Physical Chemical ◽  
Powder Component ◽  
Ionomer Cement

The aim of this study was to assess the performance of glass ionomer cement (GIC) added with TiO2nanotubes. TiO2nanotubes [3%, 5%, and 7% (w/w)] were incorporated into GIC’s (Ketac Molar EasyMix™) powder component, whereas unblended powder was used as control. Physical-chemical-biological analysis included energy dispersive spectroscopy (EDS), surface roughness (SR), Knoop hardness (SH), fluoride-releasing analysis, cytotoxicity, cell morphology, and extracellular matrix (ECM) composition. Parametric or nonparametric ANOVA were used for statistical comparisons (α≤0.05). Data analysis revealed that EDS only detected Ti at the 5% and 7% groups and that GIC’s physical-chemical properties were significantly improved by the addition of 5% TiO2as compared to 3% and GIC alone. Furthermore, regardless of TiO2concentration, no significant effect was found on SR, whereas GIC-containing 7% TiO2presented decreased SH values. Fluoride release lasted longer for the 5% and 7% TiO2groups, and cell morphology/spreading and ECM composition were found to be positively affected by TiO2at 5%. In conclusion, in the current study, nanotechnology incorporated in GIC affected ECM composition and was important for the superior microhardness and fluoride release, suggesting its potential for higher stress-bearing site restorations.

scholarly journals A traditional way to combat against Streptococcus mutans

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Prabhakar A R ◽  
Rekhamani Maganti ◽  
Mythri P ◽  
Saraswathi V Naik
Keyword(s):  
Streptococcus Mutans ◽  
Curcuma Longa ◽  
Glass Ionomer Cement ◽  
Control Group ◽  
Age Group ◽  
Glass Ionomer ◽  
Group Iii ◽  
Group Ii ◽  
Group 5 ◽  
Ionomer Cement

Purpose: This study was conducted to evaluate and compare the antimicrobial activity of conventional Glass ionomer cement, Glass ionomer cement (GIC) with 0.1% (w/w) epigallocatechin-3-gallate (EGCG) and Glass ionomer cement with 1% (w/w) Curcuma longa against streptococcus mutans.Methods: Children of age group 5-9 years, irrespective of sex, race and socioeconomic status with at least 3 cavitated dentinal lesions in primary molars clinically involving occlusal surface suitable for ART were selected.The dentinal samples were collected three times from each carious tooth, viz. baseline (before excavation of caries), after hand excavation of caries and after 7 days of restoration. The dentinal samples were subjected to microbiological evaluation for Streptococcus mutans count.Results: Experimental groups (Group II and group III) showed statistically significant reduction in Streptococcus mutans counts compared to control group (Conventional Glass ionomer cement). Group II i.e. (Glass ionomer cement with 0.1% (w/w) EGCG) showed significant reduction than Group III i.e. (Glass ionomer cement with 1% (w/w) Curcuma longa).Conclusion: ART technique was successful in reducing the streptococcus mutans load in a carious cavity but significant numbers of residual microbes were still found to be present even after the carious tissue was removed. Restoration of the cavity using EGCG and turmeric modified GIC was able to markedly reduce the S.mutans counts compared to conventional GIC. 

Comparative evaluation of compressive strength of esthetic restorative materials

2018 ◽  
Vol 14 (1) ◽  
pp. 24
Author(s):  
Dr. Sazan Sherdil Saleem
Keyword(s):  
Compressive Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Group Iii ◽  
Group I ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer ◽  
Restorative Materials ◽  
Ionomer Cement

The present study was aimed to evaluate and compare the compressive strength ofconventional glass ionomer cement with resin modified glass ionomer, compomer andmicrohybrid composite. A total of 40 specimens of esthetic restorative materials werefabricated using customized cylindrical teflon mould measuring 6mm height and 4mmdiameter and were grouped with ten specimens in each group, Group I: Conventionalglass ionomer cement (Fuji II). Group II: Resin modified glass ionomer (Fuji II LC).Group III: Compomer (Dyract AP) and Group IV: Microhybrid composite resin(Tetric Ceram).They were covered with Mylar strip and were cured using LED lightcuring unit. Compressive strength was evaluated using Universal testing machine. Theresult showed that there were a significant difference among the groups in whichTetric Ceram showed highest compressive strength and Fuji II showed the leastcompressive strength

Microscopic evaluation of rotatory and handle caries removal on glass ionomer cement/dentin interface

2018 ◽  
Vol 17 ◽  
pp. 1-9
Author(s):  
Silvio José Mauro ◽  
Adriana Beatriz Silveira Pinto Fernandes ◽  
Fernando Yamamoto Chiba ◽  
Renato Herman Sundfeld ◽  
Suzely Adas Saliba Moimaz ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
Microscopic Analysis ◽  
Conventional Technique ◽  
Atraumatic Restorative Treatment ◽  
Glass Ionomer ◽  
Hybrid Layer ◽  
Restorative Treatment ◽  
Group I ◽  
Microscopic Evaluation ◽  
Ionomer Cement

Aim: This study evaluated the interface between glass ionomer cement (GIC) and dentin using the conventional and atraumatic restorative treatment (ART) techniques for removal of decayed tissue. Materials and Methods: After preparation of the cavities by the conventional (Group I – GI) and ART (Group II – GII) techniques, the specimens were divided into 3 subgroups according to the GIC used (n=10). The conventional GIC KETAC FILL (3M/ESPE) was used in the groups GI-1 and GII-1, the conventional GIC VIDRION R (SS WHITE) in the groups GI-2 and GII-2, and the modified GIC FUJI II LC (GC Corporation) in the groups GI-3 and GII-3. For the microscopic analysis, the teeth were decalcified in a solution containing equal portions of 50% formic acid and 20% sodium citrate, dehydrated and submitted to paraffin baths. The samples were sectioned (6mm in thickness), stained by the Brown and Brenn method, and evaluated in a light microscope. Results: The microscopic analysis revealed interaction between the material and dentin structure only with the FUJI II LC. In addition, the behavior was superior for the conventional technique in comparison to the ART technique. Conclusion: It was concluded that the technique used for carious dentin removal does not seem to be determinant for the bonding of ionomeric materials to the dental structure, except for the resin-modified GIC in which the formed hybrid layer was higher using the conventional technique.

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