Hygroscopic expansion and solubility of composite restoratives

Martín, Nicolás; Jedynakiewicz, N; Fisher, Anthony C.

doi:10.1016/s0109-5641(02)00015-5

Cited by 102 publications

(86 citation statements)

References 24 publications

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“…The water uptake of the experimental formulations with and without EgMA showed values that were in agreement with previous data on commercial composite core formulations [33,34] and fulfilled the requirements for dental applications in accordance to ISO 4090 standard requirements that limit the values of water sorption and solubility to a maximum of 40 µg/mm 3 and 7.5 µg/mm 3 respectively. The reduction in water sorption and diffusion coefficients values with increasing content of EgMA monomer was due to monomer hydrophobicity and ability to form slightly cross linked structures [35] which reduced the water permeability of the polymer by decreasing the free space and thereby the swelling of the polymer.…”

Section: Discussionsupporting

confidence: 88%

Influence of a polymerizable eugenol derivative on the antibacterial activity and wettability of a resin composite for intracanal post cementation and core build-up restoration

2016

Br Dent J

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. Influence of a polymerizable eugenol derivative on the antibacterial activity and wettability of a resin composite for intracanal post cementation and core build-up restoration. Dental Materials, 32(7), 929-939. DOI: 10.1016929-939. DOI: 10. /j.dental.2016 Citing this paper Please note that where the full-text provided on King's Research Portal is the Author Accepted Manuscript or Post-Print version this may differ from the final Published version. If citing, it is advised that you check and use the publisher's definitive version for pagination, volume/issue, and date of publication details. And where the final published version is provided on the Research Portal, if citing you are again advised to check the publisher's website for any subsequent corrections. General rightsCopyright and moral rights for the publications made accessible in the Research Portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognize and abide by the legal requirements associated with these rights.•Users may download and print one copy of any publication from the Research Portal for the purpose of private study or research.•You may not further distribute the material or use it for any profit-making activity or commercial gain •You may freely distribute the URL identifying the publication in the Research Portal Take down policyIf you believe that this document breaches copyright please contact librarypure@kcl.ac.uk providing details, and we will remove access to the work immediately and investigate your claim. AbstractObjectives: Eugenol has been used in dentistry due to its ability to inhibit the growth of a range of microorganisms, including facultative anaerobes commonly isolated from infected root canals. The aim of this study was to evaluate the antibacterial activity of the experimental composites containing eugenyl methacrylate monomer (EgMA), a polymeric derivative of eugenol, against a range of oral bacteria, commonly associated with failure of coronal and endodontic restorations. In vitro composite behaviour and wettability were also studied in conjunction with their antibacterial activity.

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Section: Discussionsupporting

confidence: 88%

Influence of a polymerizable eugenol derivative on the antibacterial activity and wettability of a resin composite for intracanal post cementation and core build-up restoration

2016

Br Dent J

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“…13 Following polymerization, the inward movement of water molecules causes mobilization of ions within the matrix and outward movement of unreacted monomers, as well as the leaching out of ions from fillers and activators, which may cause softening of the resin matrix, reduction in stain resistance and leakage of filler elements. [14][15][16] Salivary enzymes, pH fluctuation, organic solvents and the ionic composition of food, beverages or saliva may influence the surface quality of dental resins.…”

Section: Discussionmentioning

confidence: 99%

“…[13][14] This may be the reason for the increase in hardness shown in the group where composite materials were suspended in water.…”

Section: Discussionmentioning

confidence: 99%

Surface Hardness of Resin Composites After Staining and Bleaching

Ökte

Villalta

Garcı́a-Godoy

et al. 2006

Operative Dentistry

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SUMMARYThis study investigated the effect of 3 staining solutions and 3 over-the-counter tooth-bleaching systems on the microhardness of 2 dental resin composites. Forty-five specimens of Filtek Supreme and Esthet-X were randomly assigned to 3 groups. Over a 40-day test period, the specimens in each group (n=15) were immersed in 1 of the 2 staining solutions (coffee and red wine) or distilled water as the control for 3 hours a day at room temperature. The 15 specimens in each staining group were further randomly divided into 3 subgroups, and the specimens in each subgroup (n=5) were bleached using one of the bleaching agents (Night Effects, Simply White Night and Opalescence Quick). Surface hardness was measured at 24 hours after polymerization (baseline), after staining and after bleaching. Means and standard deviations were calculated, and the data were analyzed using repeatedmeasures analysis of variance and Duncan's Test. The microhardness of Esthet-X was significantly higher than Filtek Supreme at baseline (p<0.01). All specimens of both materials immersed in coffee and wine revealed a significant hardness decrease compared to baseline values (p<0.05). In the control group, microhardness was increased, and this increase was statistically significant for Filtek Supreme (p<0.05). After bleaching, there was a significant decrease in mean microhard-

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“…Currently, a veneering resin composite is being used as an esthetic prosthetic material to reproduce the natural tooth crown color. However, due to physico-chemical deterioration, discoloration may occur and replacement may be necessary [1][2][3] . Ceramics have proven to be superior in chemical and color stability and to be adequately biocompatible 4,5) .…”

Section: Introductionmentioning

confidence: 99%

Silica film coating method for veneering resin composite

et al. 2011

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The preceramic polymer perhydropolysilazane (PHPS) is an attractive candidate as a coating material to prevent discoloration of veneering resin composites. At the present time, however, a practical method to apply this material is not available. The purpose of this study was to establish a low-temperature method for applying a silica film coating to a veneering resin composite. Two types of PHPS, NP and NL, were coated onto a veneering resin composite. The specimens were exposed to hydrogen peroxide vapor at 97˚C, and the state of the conversion process was evaluated using FT-IR. With exposure to the hydrogen peroxide vapor, a 0.5-µm-thick silica film similar to that produced by baking was formed on the surface of the NP samples in 10 min, while a 0.2-µm-thick film was formed on the NL in 15 min. The silica coating method described in this study may mitigate the discoloration of veneering resin composite.

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Hygroscopic expansion and solubility of composite restoratives

Cited by 102 publications

References 24 publications

Influence of a polymerizable eugenol derivative on the antibacterial activity and wettability of a resin composite for intracanal post cementation and core build-up restoration

Influence of a polymerizable eugenol derivative on the antibacterial activity and wettability of a resin composite for intracanal post cementation and core build-up restoration

Surface Hardness of Resin Composites After Staining and Bleaching

Silica film coating method for veneering resin composite

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