Influence of activation mode, fatigue, and ceramic interposition on resin cements’ diametral tensile strength

Paes, Paula Nunes Guimarães; Miranda, Mauro Sayão de; Filho, Hélio Rodrigues Sampaio; Correr-Sobrinho, Lourenço

doi:10.1590/1807-3107bor-2019.vol33.0083

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…The samples were mounted between disks of a universal testing machine (HDX, Instron, Norwood, MA, USA) and measured with a crosshead speed of 0.5 mm/min. The diametral tensile strength was calculated by Equation (1) [34]:…”

Section: Mechanical Analysis: Curing Depth Hardness Diametral Tensimentioning

confidence: 99%

Fluorinated Montmorillonite and 3YSZ as the Inorganic Fillers in Fluoride-Releasing and Rechargeable Dental Composition Resin

Tsai

Lin

et al. 2020

Polymers

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Dental caries (tooth decay) is the most frequent oral disease in humans. Filling cavities with a dental restorative material is the most common treatment, and glass ionomer cements are the main fluoride ion release restorative materials. The goal of this study was to develop a restorative compound with superior fluoride ion release and recharge abilities. Previously developed fluorinated bentolite and hydrophobized 3YSZ were used as two different inorganic fillers mixed in a bisphenol A-glycidyl methacrylate (Bis-GMA) matrix. XRD, FTIR, and TGA were used to determine the hydrophobic modification of these two inorganic fillers. In mechanical tests, including diameter tensile strength, flexural strength, and wear resistance, the developed composite resin was significantly superior to the commercial control. A WST-1 assay was used to confirm that the material displayed good biocompatibility. Furthermore, the simulation of the oral environment confirmed that the composite resin had good fluoride ion release and reloading abilities. Thus, the composite resin developed in this study may reduce secondary caries and provide a new choice for future clinical treatments.

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Section: Mechanical Analysis: Curing Depth Hardness Diametral Tensimentioning

confidence: 99%

Fluorinated Montmorillonite and 3YSZ as the Inorganic Fillers in Fluoride-Releasing and Rechargeable Dental Composition Resin

Tsai

Lin

et al. 2020

Polymers

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Assessment of Degree of Conversion and Knoop Microhardness of Different Resin Cementing Agents

Maia¹,

Silva²,

Takeuchi³

et al. 2021

TODENTJ

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Background: There are still controversies in the literature as to which is the best resinous cementing agent. Due to this fact and the immense availability of types and brands of cementing agents, further studies are needed to evaluate the properties of these important dental materials. Objective: To assess the degree of monomer conversion (DC) and Knoop microhardness (KHN) of four resin cements: two conventional dual-cured resin cements (EnForce and RelyXARC); one self-etching cement (RelyXU100); and one chemically-activated cement (Cement-Post). Methods: 20 Pieces were made to assess KHN, and 20 to assess DC (n = 5). The DC was analyzed using a Fourier-transform infrared spectrometer, and KHN of the base and the top of the pieces were assessed using the Future-Tech microhardness tester. The data of KHN were statistically analyzed by two-factor ANOVA, and data related to DC were analyzed by the Kruskal-Wallis non-parametric test. The analysis of the correlation between KHN and DC of the cementing agents was performed by linear regression. Results: Dual-cured cements exhibited lower average KHN values at the base than at the top of the pieces (p <0.05). The self-etching cement had a significantly higher average KHN value than the other assessed cements (p <0.05). The DC of the dual-cured cement did not differ (p >0.05). The chemically-activated cement exhibited the lowest averages of KHN and DC values (p <0.05). Linear regression analysis indicated a strong correlation between DC and KNH (p = 0.043; R2 = 0.96); however, a specific hardness value could not be correlated to a specific DC value. Conclusion: Preferably, dual-cured resin cements (conventional or self-etching) should be used. Chemically-activated resin cements should be avoided due to their lower averages of DC and KHN values.

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Influence of activation mode, fatigue, and ceramic interposition on resin cements’ diametral tensile strength

Cited by 2 publications

References 30 publications

Fluorinated Montmorillonite and 3YSZ as the Inorganic Fillers in Fluoride-Releasing and Rechargeable Dental Composition Resin

Fluorinated Montmorillonite and 3YSZ as the Inorganic Fillers in Fluoride-Releasing and Rechargeable Dental Composition Resin

Assessment of Degree of Conversion and Knoop Microhardness of Different Resin Cementing Agents

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