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 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.

scholarly journals In vitro quantitative evaluation of marginal microleakage in class II restorations confected with a glass ionomer cement and two composite resins

2001 ◽  
Vol 15 (4) ◽  
pp. 277-282 ◽  
Author(s):  
Maria Fernanda Borro BIJELLA ◽  
Maria Francisca Thereza Borro BIJELLA ◽  
Salete Moura Bonifácio da SILVA
Keyword(s):  
Glass Ionomer Cement ◽  
Class Ii ◽  
Deionized Water ◽  
Composite Resins ◽  
Glass Ionomer ◽  
Dye Penetration ◽  
Significant Difference ◽  
Distal Direction ◽  
Ionomer Cement

This study evaluated, in vitro, marginal microleakage in class II restorations confected with the glass ionomer cement Vitremer and with the composite resins Ariston pHc and P-60. The aims of the study were to assess the effect of thermocycling on those materials and to evaluate two methods utilized in the analysis of dye penetration. Sixty premolars divided in three groups were utilized; the teeth had proximal cavities whose cervical walls were located 1 mm below the cementoenamel junction. Half of the test specimens from each group underwent thermocycling; the other half remained in deionized water, at 37ºC. The specimens were immersed, for 24 hours, in a basic 0.5% fuchsin solution at 37ºC. For the analysis of microleakage, the specimens were sectioned in a mesio-distal direction, and the observation was carried out with the software Imagetools. The results were evaluated through the 2-way ANOVA and through the Tukey’s test. All groups presented marginal microleakage. The smallest values were obtained with Vitremer, followed by those obtained with the composite resins P-60 and Ariston pHc. There was no statistically significant difference caused by thermocycling, and the method of maximum infiltration was the best for detecting the extension of microleakage.

scholarly journals In vitro and in vivo evaluations of glass-ionomer cement containing chlorhexidine for Atraumatic Restorative Treatment

2017 ◽  
Vol 25 (5) ◽  
pp. 541-550 ◽  
Author(s):  
Cristiane Duque ◽  
Kelly Limi Aida ◽  
Jesse Augusto Pereira ◽  
Gláucia Schuindt Teixeira ◽  
Angela Scarparo Caldo-Teixeira ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
Atraumatic Restorative Treatment ◽  
Glass Ionomer ◽  
Restorative Treatment ◽  
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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