The effects of cross‐linking agents on the water sorption and solubility characteristics of denture base resin

Arima, Takashi; Murata, Hiroshi; Hamada, Takashi

doi:10.1111/j.1365-2842.1996.tb00882.x

Cited by 104 publications

(116 citation statements)

References 25 publications

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“…The Al 2 O 3 -added groups exhibited significantly lower water sorption values compared with those in group 4 (control) due to the insolubility of Al 2 O 3 nanoparticles in water. However, previous studies have indicated that the addition of nanoparticle fillers to improve the mechanical properties of PMMA increases the water sorption of acrylic resins (4,36,37). In particular, the increase in the nanoparticle filler ratio causes more water sorption because of more nanoparticle filler-matrix particle interface.…”

Section: Discussionmentioning

confidence: 99%

The effects of adding various ratios of zirconium oxide nanoparticles to poly(methyl methacrylate) on physical and mechanical properties

Ergün

Şahin

Ataol

2018

Journal of Oral Science

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Abstract:The aim of the present study is to evaluate the transverse strength, modulus of elasticity, surface roughness, hardness, and water sorption/solubility of nanoparticle zirconium oxide (nano-ZrO 2 ) added to heat-cured poly(methyl methacrylate) (PMMA) after thermocycling. The specimens were divided into four groups according to the ratio of nano-ZrO 2 addition to heat-cured PMMA; group 1: 5% nano-ZrO 2 ; group 2: 10% nano-ZrO 2 ; group 3: 20% nano-ZrO 2 , and group 4 (control): PMMA without nano-ZrO 2 . A statistically significant decrease in transverse strength was observed by all additional rates of nanoZrO 2 compared with group 4 (control; P < 0.025). When hardness results were evaluated, groups 1 and 2 showed statistically higher values compared with groups 3 and 4 (P < 0.025). The surface roughness of group 3 was statistically higher than the other groups (P < 0.025), but it was within the clinically acceptable limits. As the nano-ZrO 2 addition rate increased, water sorption/solubility values of the specimens also increased. Although nano-ZrO 2 addition had an adverse effect on some mechanical and physical properties of heat-cured PMMA, it increased hardness values, implying that the addition of nano-ZrO 2 would contribute positively to some mechanical properties of PMMA denture base material when nano-ZrO 2 was homogeneously distributed in PMMA.

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Section: Discussionmentioning

confidence: 99%

The effects of adding various ratios of zirconium oxide nanoparticles to poly(methyl methacrylate) on physical and mechanical properties

Ergün

Şahin

Ataol

2018

Journal of Oral Science

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“…A number of studies have reported that water absorption is influenced by factors such as filler content 40,41) , presence of residual unpolymerized monomers, inclusion of air bubbles 42,43) , and the cross-linking degree of resin molecules 44,45) . In particular, incomplete polymerization might cause the physical properties of the resin material to deteriorate and microleakage to increase, thereby inducing color changes.…”

Section: Discussionmentioning

confidence: 99%

Effects of different food colorants and polishing techniques on color stability of provisional prosthetic materials

2010

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The main objective was to investigate the effects of different polishing techniques on the color stability of provisional prosthetic materials upon exposure to different staining agents by mimicking the oral environment in vitro. Fifty-six cylindrical specimens were prepared for each type of material: bis-acryl and light-polymerized composite resins, and methyl methacrylate-and ethyl methacrylatebased resins. The specimens were polished using seven different polishing techniques and then immersed in four different staining agents. Color was measured with a spectrophotometer before and after immersion, and color changes (ΔE) were calculated. The effects of the type of provisional material, polishing procedure, staining agent, and their interactions on color stability were significant (p<0.05). Amongst these factors, the staining agent exerted the strongest effect on color stability. Amongst the provisional materials tested, methacrylate-based resins exhibited the highest color stability irrespective of polishing technique and staining agent.

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“…As the equilibrium water sorption is achieved in 24 h 5) , the control specimen in the present study seemed to reach water sorption saturation after 50 hours' water immersion. As the denture base resin was immersed in water, soluble constituents such as unreacted monomers, plasticizers, and initiators leached out 23) . The remaining microvoids formed were filled with water molecules through inward diffusion.…”

Section: Discussionmentioning

confidence: 99%

Effect of long-term water immersion or thermal shock on mechanical properties of high-impact acrylic denture base resins

Sasaki

Hamanaka

Takahashi

et al. 2016

Dental Materials Journal

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The purpose of this study was to investigate the effect of long-term water immersion or thermal shock on the mechanical properties of high-impact acrylic denture base resins. Two high-impact acrylic denture base resins were selected for the study. Specimens of each denture base material tested were fabricated according to the manufacturers' instructions (n=10). The flexural strength at the proportional limit, the elastic modulus and the impact strength of the specimens were evaluated. The flexural strength at the proportional limit of the high-impact acrylic denture base resins did not change after six months' water immersion or thermocycling 50,000 times. The elastic moduli of the high-impact acrylic denture base resins significantly increased after six months' water immersion or thermocycling 50,000 times. The impact strengths of the high-impact acrylic denture base resins significantly decreased after water immersion or thermocycling as described above.

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The effects of cross‐linking agents on the water sorption and solubility characteristics of denture base resin

Cited by 104 publications

References 25 publications

The effects of adding various ratios of zirconium oxide nanoparticles to poly(methyl methacrylate) on physical and mechanical properties

The effects of adding various ratios of zirconium oxide nanoparticles to poly(methyl methacrylate) on physical and mechanical properties

Effects of different food colorants and polishing techniques on color stability of provisional prosthetic materials

Effect of long-term water immersion or thermal shock on mechanical properties of high-impact acrylic denture base resins

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