Effect of Three Clinical Curing Treatments on Fluoride Release and Surface Hardness of Glass-Ionomer Cements

Dionysopoulos, Dimitrios; Tolidis, Kosmas; Gerasimou, Paris; Sfeikos, Thrasyvoulos

doi:10.11607/prd.3100

Cited by 17 publications

(29 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is in agreement with previous studies which investigated the effect of radiant heat treatments on surface hardness of GIC materials [8,9,11,12,15]. Thermal energy providing by the LED light-curing unit increased surface hardness of the tested GIC materials by thermocatalysis.…”

Section: Discussionsupporting

confidence: 92%

“…In previous studies various techniques have been suggested in order to increase the surface hardness of the GIC 2 Advances in Materials Science and Engineering materials, which include radiant heat transfer by use of dental light-curing units such as light emitting diodes (LEDs) [9][10][11] or lasers [12], ultrasonic energy transfer to enhance the motivation and interaction of the reacted components of the GIC [9,13,14], and application of calcium chloride (CaCl 2 ) solutions in order to enhance the acid-base reaction between carboxylate groups (-COO − ) of the polyalkenoic acids and calcium cations (Ca +2 ) of the glass particles of the cement [15,16]. Among the above techniques the most common one for improving the physical and mechanical properties of the GIC materials is the radiant heat treatment using dental LED curing units.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Surface Microhardness and Abrasion Resistance of Two Dental Glass Ionomer Cement Materials after Radiant Heat Treatment

Dionysopoulos

Tolidis

Sfeikos

et al. 2017

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

The aim of this study was to evaluate the effect of a radiant heat treatment using a dental LED unit on the surface microhardness and abrasion resistance after toothbrushing simulation of two conventional GIC materials. Two conventional GIC materials were studied in this investigation: Ketac Fil Plus Aplicap and IonoStar Molar. Twenty disk-shaped specimens ( = 10) were prepared of each GIC (7 mm × 2 mm) using cylindrical Teflon molds. Group 1 specimens were left in the mold to set without any treatment, while in Group 2 after placement in the mold the specimens were irradiated for 60 sec at the top surface using a LED light-curing unit. Toothbrushing simulation was carried out using a commercial electric toothbrush which was fixed in a constructed device that allowed the heads of the brushes to be aligned parallel to the surface of the specimens and to control the pressure, with the following parameters: load of the toothbrush standardized at 250 g, medium hardness toothbrush head, and rotation sense changing every 30 sec. The toothbrush abrasion test mechanism, based on a 1.25-Hz frequency for 10,000 cycles, was equivalent to 800 days (∼2 years) of brushing. Surface hardness, surface roughness, and surface loss after abrasive procedure were evaluated using Vickers method and Vertical Scanning Interferometry. Data were statistically analyzed using one-way ANOVA and Tukey's post hoc test ( = 0.05). The radiant heat treatment increased the surface microhardness and decreased surface roughness and surface loss after abrasive procedures of both the tested GIC materials but to different extent. Between the tested GIC materials there were significant differences in their tested properties ( < 0.05).

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Evaluation of Surface Microhardness and Abrasion Resistance of Two Dental Glass Ionomer Cement Materials after Radiant Heat Treatment

Dionysopoulos

Tolidis

Sfeikos

et al. 2017

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, their high viscosity makes the handling of the material more difficult, making it more likely for bubbles to form inside it, which can result in failures. Different measures including the use of heat or ultrasound have been proposed to optimize the mechanical properties of this material . However, ultrasound and its heat production can cause changes in the tooth structures, requiring more attention and research .…”

Section: Discussionmentioning

confidence: 99%

“…According to these authors, these devices improve the GIC curing reaction, accelerating the formation of the matrix and polyacids, making it more stable. It is reported that, in these cases, the GIC is formed with less porosity, spaces and microgaps . As fluoride is weakly connected to the matrix, the reduction of these porosities limits the imprisonment of this ion, and therefore its release.…”

Section: Discussionmentioning

confidence: 99%

“…Different measures including the use of heat or ultrasound have been proposed to optimize the mechanical properties of this material. 11,20,21 However, ultrasound and its heat production can cause changes in the tooth structures, 7 requiring more attention and research. 22 Thus, the present study aimed to evaluate the innovative use of a sonic device on the GIC properties of microhardness, bubble formation and fluoride release of a HV-GIC.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Use of sonic waves in bubble formation, microhardness and fluoride release of a high‐viscosity glass‐ionomer cement

Hironaka

Trizzi

Yoshida

et al. 2019

J of Invest & Clin Dent

View full text Add to dashboard Cite

Aim High‐viscosity glass‐ionomer cements (HV‐GIC) are indicated for restorations but their viscosity favors the inclusion of bubbles within it. This study aimed to evaluate the use of ultrasonic and sonic waves in bubble formation, microhardness and fluoride release in a HV‐GIC, also considering a different powder:liquid ratio (P/L). Methods Twenty‐four molars with occlusal cavities were divided into four groups (N = 6): CG, HV‐GIC with manual insertion; UG, application of ultrasonic waves; SG, application of sonic waves; and FG, HV‐GIC fluid (1:2 P/L) with manual insertion. After 24 hours, bubbles and microhardness (50 g/5 s) were measured. Fluoride release (N = 10) was evaluated in CG, SG and UG after cariogenic challenge for 11 days. Microhardness, total area and number of bubbles, and fluoride release were submitted to ANOVA and Tukey's test. The average size of bubbles was analyzed by Kruskal‐Wallis test (α = 5%). Results FG presented the lowest value of microhardness and higher average size for bubbles (P < .05). Differences concerning total number, total area occupied by bubbles and fluoride release were not found (P > .05). Conclusion The use of sonic and ultrasonic waves had no influence on bubble formation, microhardness and fluoride release of a HV‐GIC. Changing the P/L is not recommended.

show abstract

Effect of a calcium chloride solution treatment on physical and mechanical properties of glass ionomer cements

et al. 2018

View full text Add to dashboard Cite

This paper details a novel method to improve wear resistance of dental glass ionomer cement (GIC) restorations. The purpose of this in vitro study was to evaluate the effect of a calcium chloride (CaCl) solution treatment on surface hardness, surface roughness, compressive strength, water sorption and solubility of three conventional glass ionomer cements (GICs). Additionally, the changes of the Ca composition and morphology of the surface of the tested GICs were also investigated. The experimental groups of the study were: Group 1 (control) specimens after mixing were left in the mold to set without any treatment for 5 min; Group 2 specimens were left in the mold to set for 5 min and then each specimen was immersed in 10 ml of 42.7 wt% CaCl solution for 60 s. Statistical analysis was performed using one-way ANOVA and Tukey post hoc tests (a = 0.05). Calcium chloride solution treatment increased surface hardness of the GICs compared to control groups (P < 0.05), while surface roughness and compressive strength did not change after the treatment (P > 0.05). Reduction in water sorption and solubility was detected but not in all CaCl solution-treatment groups. No alterations were observed in surface morphology of the GICs, while surface calcium composition was increased after the treatment (P < 0.05). The use of a CaCl solution immediately after initial setting of GICs may be advantageous for some properties of the materials and possibly leads to improved prognosis and wear resistance of their restorations.

show abstract

Effect of Three Clinical Curing Treatments on Fluoride Release and Surface Hardness of Glass-Ionomer Cements

Cited by 17 publications

References 12 publications

Evaluation of Surface Microhardness and Abrasion Resistance of Two Dental Glass Ionomer Cement Materials after Radiant Heat Treatment

Evaluation of Surface Microhardness and Abrasion Resistance of Two Dental Glass Ionomer Cement Materials after Radiant Heat Treatment

Use of sonic waves in bubble formation, microhardness and fluoride release of a high‐viscosity glass‐ionomer cement

Effect of a calcium chloride solution treatment on physical and mechanical properties of glass ionomer cements

Contact Info

Product

Resources

About