Effect of gloss and heat on the mechanical behaviour of a glass carbomer cement

Menne-Happ, Ulrike; Ilie, Nicoleta

doi:10.1016/j.jdent.2012.11.005

Cited by 52 publications

(83 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several close cracks were observed in the Riva group, which were caused by dehydration [10]. However, this aspect was not significantly reflected in the measured mechanical properties.…”

Section: Resultsmentioning

confidence: 77%

Evaluation of Surface Properties of Four Tooth-Colored Restorative Materials

et al. 2015

View full text Add to dashboard Cite

The aim of this study is to compare microhardness, roughness and micromorphology of the examined materials of a newly developed glass carbomer dental filling material to two different resin modified glass ionomers and a glass ionomer dental filling material. Specimens tested were prepared from a glass carbomer without gloss (Glass Carbomer, GCP), a glass carbomer (Glass Carbomer, GCP) with gloss, two different resin modified glass ionomers (Fuji II LC, GC and Riva LC, SDI) and a glass ionomer (Equia, GC). Seven specimens of each material were prepared according to manufacturer's recommendations. After setting, samples were polished and stored in 37• C distilled water for 24 h. Indentation microhardness of examined restorative materials was measured using the Vickers indenters. In addition surface roughness of the materials was measured using surface profilemeter. Surface morphology was analyzed by using scanning electron microscopy. There was a significant difference in microhardness and roughness between the restorative materials (p < 0.05). The highest microhardness was measured for Equia and lowest for glass carbomer with gloss. The roughness was fully definite for the glass carbomer with gloss and indefinite for the glass carbomer without gloss. Small cracks and voids were observed in all groups. High viscosity glass ionomer cement Equia exhibits the high physical strength than RMGIC. Gloss application does not influence the hardness behavior of GCP.

show abstract

“…Several close cracks were observed in the Riva group, which were caused by dehydration [10]. However, this aspect was not significantly reflected in the measured mechanical properties.…”

Section: Resultsmentioning

confidence: 77%

Evaluation of Surface Properties of Four Tooth-Colored Restorative Materials

et al. 2015

View full text Add to dashboard Cite

show abstract

“…For this purpose, the diamond indenter pyramid (α=136 degrees) of the hardness testing machine was pressed vertically into the specimen´s polished surface with a load of 10 N for 20 seconds. 34 The maximum penetration depth was 0.05 mm. The indenter displacement of the definite test frame represented the total amount of the elastic deformation of the surface along with the plastic depth of the impression.…”

Section: Methodsmentioning

confidence: 92%

Physicomechanical characterization of polyetheretherketone and current esthetic dental CAD/CAM polymers after aging in different storage media

Liebermann

Wimmer

Schmidlin

et al. 2016

The Journal of Prosthetic Dentistry

173

126

View full text Add to dashboard Cite

STATEMENT OF PROBLEM: Polyetheretherketone (PEEK) can be used to support fixed dental prostheses. However, information about physicomechanical characterization is still scarce. PUR-POSE: The purpose of this in vitro study was to assess effects of different aging regimens/durations on roughness, solubility, water absorption, Martens hardness (HM), and indentation modulus/EIT on different computer-aided design and computer-aided manufacturing (CAD/CAM) polymers. MATERIAL AND METHODS: Forty standardized specimens of the following materials were fabricated: PEEK: Dentokeep (DK); hybrid material: VITA Enamic (EN); composite resins: LAVA Ultimate (LU) and an experimental CAD/CAM nanohybrid-composite resin (EX); poly(methyl methacrylate) (PMMA)-based: VITA CAD-Temp (CT); Telio CAD (TC), artBloc Temp (AT), and ZENOTEC ProFix (ZP). A nanofilledpolymer for interim restorations, Protemp 4 (CG), served as the control group. Specimens were stored in sodium chloride, artificial saliva, physiological saliva, and distilled water at 37°C for 1, 7, 14, 28, 90, and 180 days. Roughness, water absorption, HM, and EIT were investigated after each storage period; solubility was determined after 180 days only. Data were analyzed using weighted 3/2/1-way ANOVA and the post hoc Scheffé tests (=.05). RESULTS: Storage media had no effect on surface roughness and water absorption. Physiological saliva revealed the highest significant impact on solubility followed by artificial saliva, sodium chloride, and distilled water. Water absorption increased significantly with storage duration. PEEK showed the lowest solubility and water absorption values. The highest solubility was observed for the conventional polymer CG, and the highest water absorption was found for the composite LU. PMMA-based TC, ZP, CG, and AT showed the lowest HM and indentation modulus, followed by CT, and PEEK. The highest values were observed for the hybrid material EN, followed by LU and EX. CONCLUSIONS: The hardness parameters of PEEK were comparable with those of PMMA-based materials. group. Specimens were stored in sodium chloride, artificial saliva, physiological saliva, and distilled water at 37°C for 1, 7, 14, 28, 90, and 180 days. Roughness, water absorption, HM, and E IT were investigated after each storage period; solubility was determined after 180 days only. Data were analyzed using weighted 3/2/1-way ANOVA and the posthoc Scheffé tests (α=05).Results. Storage media had no effect on surface roughness and water absorption.Physiological saliva revealed the highest significant impact on solubility followed by artificial saliva, sodium chloride, and distilled water. Water absorption increased significantly with storage duration. PEEK showed the lowest solubility and water absorption values. The highest ! ! ! 2! solubility was observed for the conventional polymer CG, and the highest water absorption was found for the composite LU. PMMA-based TC, ZP, CG, and AT showed the lowest HM and indentation modulus, followed by CT, and PEEK. The highest values were ...

show abstract

“…They can continuously release fluoride and show no setting shrinkage under clinical conditions 11,12) . The major drawbacks of the glass ionomer cements are their lack of physical strength, especially in the initial stage of their setting, their slow setting reactions, and their moisture sensitivity 12,13) . The poor mechanical properties of the present glass ionomer cements make them unsuitable for posterior teeth restorations in high stress-bearing areas 14) .…”

Section: Introductionmentioning

confidence: 99%

“…Its clinical application is similar to that of conventional glass ionomer cements, except that heat application is recommended during the setting reaction. According to the manufacturer, this material sets chemically, and a high output light curing unit with a maximum heat level of 60°C should be applied for optimal setting results 13) . For many years, the possible damaging effect of the high temperatures associated with restorative treatments on the pulp tissue has been a matter of concern in dentistry.…”

Section: Introductionmentioning

confidence: 99%

Intrapulpal temperature changes during curing of different bulk-fill restorative materials

Yaşa¹,

Atalayın

Karaçolak

et al. 2017

Dent. Mater. J.

View full text Add to dashboard Cite

The aim of this study was to evaluate the intrapulpal temperature changes during the curing of different bulk-fill restorative materials. Ten mandibular molar teeth were selected and occlusal surfaces were removed to obtain a standard 0.5 mm occlusal dentin thickness. Five bulk-fill restorative materials and a conventional resin composite (control) were applied. The intrapulpal temperature changes during the curing of these materials were determined by a device simulating pulpal blood microcirculation. The difference between the initial and maximum temperature values (Δt), was recorded. The data were statistically analyzed with one-way ANOVA and Tukey's HSD test (p<0.05). There were statistically significant differences between materials (p<0.001). The light-curing bulkfill restoratives exhibited the highest Δt values. Equia Forte showed the lowest Δt values among all the groups (p<0.05). Bulk-fill restorative materials causes significantly different temperature changes in the pulp chamber according to curing type. Therefore, clinicians should be considered when using these materials.

show abstract

Effect of gloss and heat on the mechanical behaviour of a glass carbomer cement

Cited by 52 publications

References 24 publications

Evaluation of Surface Properties of Four Tooth-Colored Restorative Materials

Evaluation of Surface Properties of Four Tooth-Colored Restorative Materials

Physicomechanical characterization of polyetheretherketone and current esthetic dental CAD/CAM polymers after aging in different storage media

Intrapulpal temperature changes during curing of different bulk-fill restorative materials

Contact Info

Product

Resources

About