Effect of gypsum separating media on the appearance of stone cast surfaces

Kim, Tae Hyung; Ahn, Tae Jun; Enciso, Reyes; Knežević, Andrea

doi:10.1016/j.prosdent.2014.06.011

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Typically, such separating materials contain petroleum jelly with high surface wettability. [29] Table 2a. The mean shear bond strength values (MPa ± standard deviations), confidence intervals (95%) between resin cement and direct and indirect resin composite after different contamination media without surface conditioning, Weibull parameters (shape and scale), distribution and frequency of failure types per experimental group analyzed after bond strength test: Adhesive: no resin cement left on the composite surface; Mixed: less than half of the cement left adhered on the composite surface with no cohesive failure of the substrate.…”

Section: Discussionmentioning

confidence: 99%

Effect of clinical and laboratory contamination media on the adhesion of luting cement to direct and indirect resin composite materials

Koc-Dundar

Özcan

2016

Journal of Adhesion Science and Technology

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This study evaluated the effect of contamination media on the adhesion of resin cement to resin composites. Specimens of direct (DRC) (Quadrant Photo Posterior) and indirect resin composite (IRC) (Gradia) (N = 300, n = 15 per group) were prepared. Except the control group (C), the specimens of DRC and IRC were contaminated with one of the following media: (a) saliva (S), (b) silicon (SI), (c) dental stone (D), and (d) isolation medium (I). While one half was only rinsed with water, the other half was silica coated (30 m SiO2, Siljet). All specimens were silanized (Monobond Plus) and coated with adhesive resin (Heliobond). Resin cement (Variolink II) was bonded to the substrates and photopolymerized for 40 s. After thermocycling (x5.000, 5-55°C), composite-cement interface was loaded under shear in a Universal Testing Machine (1 mm/min). Data (MPa) were analyzed using Univariate analysis, Tukey's and Dunnett-T3 tests. Both contamination media (p = 0.000) and surface conditioning (p = 0.005) significantly affected adhesion to DRC and IRC. No significant difference was found between the DRC and IRC (without: p = 0.098; with: p = 0.084). Significantly lower results were obtained after SI (DRC: 0.66 ± 0.6; IRC: 0.8 ± 1.3) followed by I contamination (DRC: 2.1 ± 2.6; IRC: 0.8 ± 1.3) (p < 0.05). Regardless of contamination medium, surface conditioning significantly increased the results for both DRC (15.1 ± 6.1-23.6 ± 3.7) and IRC (20.3 ± 5.4-25.1 ± 3.6) (p < 0.05). Weibull distribution increased after surface conditioning for both DRC (without: 1.33-3.27; with: 2.55-9.34) and This study evaluated the effect of contamination media on the adhesion of resin cement to resin composites. Specimens of direct (DRC) (Quadrant Photo Posterior) and indirect resin composite (IRC) (Gradia) (N = 300, n = 15 per group) were prepared. Except the control group (C), the specimens of DRC and IRC were contaminated with one of the following media: (a) saliva (S), (b) silicon (SI), (c) dental stone (D), and (d) isolation medium (I). While one half was only rinsed with water, the other half was silica coated (30 μm SiO 2 , Siljet). All specimens were silanized (Monobond Plus) and coated with adhesive resin (Heliobond). Resin cement (Variolink II) was bonded to the substrates and photo-polymerized for 40 s. After thermocycling (x5.000, 5-55 °C), composite-cement interface was loaded under shear in a Universal Testing Machine (1 mm/min). Data (MPa) were analyzed using Univariate analysis, Tukey's and Dunnett-T3 tests. Both contamination media (p = 0.000) and surface conditioning (p = 0.005) significantly affected adhesion to DRC and IRC. No significant difference was found between the DRC and IRC (without: p = 0.098; with: p = 0.084). Significantly lower results were obtained after SI (DRC: 0.66 ± 0.6; IRC: 0.8 ± 1.3) followed by I contamination (DRC: 2.1 ± 2.6; IRC: 0.8 ± 1.3) (p < 0.05). Regardless of contamination medium, surface conditioning significantly increased the results for both DRC (15.1 ± 6.1-23.6 ± 3.7) and IRC (20.3 ...

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Section: Discussionmentioning

confidence: 99%

Effect of clinical and laboratory contamination media on the adhesion of luting cement to direct and indirect resin composite materials

Koc-Dundar

Özcan

2016

Journal of Adhesion Science and Technology

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“…However, according to the work of Paes-Junior et al [10] it was possible to reduce the amount of residues by pre-drying the plaster before curing the resin. During the separation of the plaster, depending on the agent used, a smoother and brighter surface is obtained [11] . Besides, to reduce the undesirable effects of PMMA, a light-and heat-cured urethane dimethacrylate (UDMA) emerged, which is characterized by its biocompatibility, low bacterial adherence, greater resistance to masticatory loads, and thus providing greater satisfaction for the patient [12] .…”

Section: Introductionmentioning

confidence: 99%

Effect of drying different inclusion plasters on the mechanical properties of thermoactivated acrylic resins

et al. 2021

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This article aimed to evaluate some mechanical and chemical properties of acrylic thermoactivated resins by microwave energy, varying the condition and type of plaster. The groups were divided into Lucitone and Vipi-Wave groups, with or without previous treatment (drying) of type III and IV plasters. It was evaluated flexural strength, microhardness, roughness, porosity, residual monomer, and also, time and temperature relationship of plaster and acrylic resin during the polymerization cycles. The data were analyzed using Analysis of Variance (ANOVA) 5%, followed by Tukey's test. The results showed that the drying of the plaster influenced the results and the groups with dry plaster maintained a higher temperature permanence. Therefore, changes in the water condition contained in the inclusion plaster showed effects on the final properties of the acrylic resin, which may be a technical indicator for laboratory procedures in the manufacture of prosthetic devices.

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Evaluation of separating media for autopolymerizing acrylic resin fabricated on 3D-printed acrylate-based resin dental casts

Farah

Elzeky

Alresheedi

et al. 2023

The Journal of Prosthetic Dentistry

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Effect of gypsum separating media on the appearance of stone cast surfaces

Cited by 3 publications

References 9 publications

Effect of clinical and laboratory contamination media on the adhesion of luting cement to direct and indirect resin composite materials

Effect of clinical and laboratory contamination media on the adhesion of luting cement to direct and indirect resin composite materials

Effect of drying different inclusion plasters on the mechanical properties of thermoactivated acrylic resins

Evaluation of separating media for autopolymerizing acrylic resin fabricated on 3D-printed acrylate-based resin dental casts

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