Influence of Thermo-Light Curing with Dental Light-Curing Units on the Microhardness of Glass-Ionomer Cements

Gavić, Lidia; Goršeta, Kristina; Borzabadi‐Farahani, Ali; Tadin, Antonija; Glavina, Domagoj; Duinen, Raymond N van; Lynch, Edward

doi:10.11607/prd.2405

Cited by 26 publications

(20 citation statements)

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“…Reinforcement phases such as zirconia, hydroxyapatite, N-vinyl pyrrolidone, N-vinyl caprolactam, fluoroapatite, and HA/ZrO 2 have been used to enhance GIC mechanical properties 2,11,14) . GICs are susceptible to water or saliva contamination in the first 10 min of the setting, and to dehydration in the long-term hardening process 25) . Thermo-light-polymerization during setting of GIC has been shown to improve microhardness of GIC, improve marginal adaptation of material on the cavity walls, increase bond strength to enamel, and decrease porosity inside material 25) .…”

Section: Discussionmentioning

confidence: 99%

“…GICs are susceptible to water or saliva contamination in the first 10 min of the setting, and to dehydration in the long-term hardening process 25) . Thermo-light-polymerization during setting of GIC has been shown to improve microhardness of GIC, improve marginal adaptation of material on the cavity walls, increase bond strength to enamel, and decrease porosity inside material 25) . Limitations of the study are that only one weight ratio was tested for nanoparticles of fluorroapatite, and the study period was of relatively short.…”

Section: Discussionmentioning

confidence: 99%

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Effects of incorporation of nano-fluorapatite particles on microhardness, fluoride releasing properties, and biocompatibility of a conventional glass ionomer cement (GIC)

et al. 2016

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Present study evaluated effects of addition of Nanoparticles fluorapatite (Nano-FA) on microhardness and fluoride release of a Glass Ionomer Cement (GIC, Fuji IX GP Fast). Forty-eight specimens prepared, divided equally into 4 groups (2 with Nano-FA); after 24 h and one week Vickers microhardness (HV) was measured. Nano-FA specimens were made from addition of nano-FA to Fuji IX powder (glass powder/Nano-FA ratio=20:1 wt/wt, 3.6:1 P/L ratio). At 24 h, mean (95% CI) HV for GIC and Nano-FA GIC were 40.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effects of incorporation of nano-fluorapatite particles on microhardness, fluoride releasing properties, and biocompatibility of a conventional glass ionomer cement (GIC)

et al. 2016

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“…Therefore, the alternative factor could be the use of LED curing light to provide heat during the setting reaction, which was different between the current and their study. Recently, the effect of heat on the mechanical property of GlC was reported by Gavic et al [19]. They reported increased microhardness of GIC at different depths when thermolight curing was utilized during the initial setting of the material.…”

Section: Discussionmentioning

confidence: 94%

“…They reported increased microhardness of GIC at different depths when thermolight curing was utilized during the initial setting of the material. This improved microhardness can lead to increased flexural strength, thus improving the mechanical properties of the material [19].…”

Section: Discussionmentioning

confidence: 99%

Flexural Strength of Glass Carbomer Cement and Conventional Glass Ionomer Cement Stored in Different Storage Media over Time

2018

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Objectives: Glass ionomer cement (GIC) is routinely placed as a restorative material in dentistry. However, due to its poor physical properties, its use is limited to cases where the level of stress on restoration is minimal. Improved formulations of GIC have been developed to overcome these drawbacks. The purpose of this study was to evaluate flexural strength of a conventional GIC (Fuji IX) against a newly developed glass carbomer cement (GCP). Materials and Methods: For Fuji IX and GCP, a total of 80 blocks were prepared and divided into 16 groups (n = 5). These groups were further categorized according to the storage medium (artificial saliva and Vaseline) and time intervals (24 h and 1, 2, and 4 weeks). A 3-point bending test was carried out, and statistical analysis was done using ANOVA and Tukey post hoc tests. Results: Fuji IX showed a mean flexural strength of 25.14 ± 13.02 versus 24.27 ± 12.57 MPa for GCP. There was no significant statistical difference between both materials when compared under storage media. Both materials showed the highest value for flexural strength at 2 weeks of storage and lowest at 4 weeks. Conclusion: The storage media do not affect the flexural strength of the specimens with reference to time. Time is the unique factor with relative influence on mean resistance to fracture. Further testing is required to evaluate the true potential of the newly developed GCP.

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“…Furthermore, heat application by a light-curing unit during setting has been also suggested. Heat application is supposed to accelerate the setting reaction of GICs and thus getting over the initial critical setting period before exposure to saliva 10,11) .…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and water sorption of two experimental glass ionomer cements with hydroxyapatite or calcium fluorapatite formulation

et al. 2019

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In this study the mechanical behavior and water sorption (Ws) of experimental glass-ionomer-cements (GICs) with hydroxyapatite (HA) or calcium fluorapatite (CFA) prototype formulations were examined. Specimens from two experimental and one commercially available GIC were prepared in three protocols; (1) according to the manufacturer's instructions, (2) with coating and (3) with heat application. The specimens were stored in distilled water or artificial saliva at 37°C for 7-and 30-days. Flexural strength (FS), Vickers hardness (VHN) and Ws of GICs were evaluated. Experimental GICs showed higher FS values than commercial GIC (p<0.001). Higher FS and VHN values were observed when GICs were prepared according to manufacturer's recommendation. FS was affected only by GIC-type (η 2 =0.027), whereas VHN was affected by GIC-type (η 2 =0.331), treatment-protocols (η 2 =0.067), storage-medium (η 2 =0.100) and increased storage-duration (η 2 =0.317). The tested parameters did not significantly influence the Ws of all tested GICs (p>0.05). The GICs with HA or CFA formulations might represent a promising approach due to their FS, VHN and Ws characteristics.

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Influence of Thermo-Light Curing with Dental Light-Curing Units on the Microhardness of Glass-Ionomer Cements

Cited by 26 publications

References 0 publications

Effects of incorporation of nano-fluorapatite particles on microhardness, fluoride releasing properties, and biocompatibility of a conventional glass ionomer cement (GIC)

Effects of incorporation of nano-fluorapatite particles on microhardness, fluoride releasing properties, and biocompatibility of a conventional glass ionomer cement (GIC)

Flexural Strength of Glass Carbomer Cement and Conventional Glass Ionomer Cement Stored in Different Storage Media over Time

Mechanical properties and water sorption of two experimental glass ionomer cements with hydroxyapatite or calcium fluorapatite formulation

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