Properties of highly cross-linked autopolymerizing reline acrylic resins

Arima, Takashi; Murata, Hiroshi; Hamada, Takashi

doi:10.1016/s0022-3913(05)80273-2

Cited by 126 publications

(164 citation statements)

References 16 publications

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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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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 differences in composition and structure among the available materials have great influence on mechanical properties 3,[6][7][8] , manipulation 3) , durability 3) , water absorption and solubility of the liquid components 3,6,7,9) , bond strength to denture base resins [10][11][12] and exothermic reactions during polymerization [13][14][15] with mechanical properties especially important for the lifetime of dentures with denture reline resins. The properties of denture reline resins have been determined by findings obtained in a 3-point bending test 6,7) , Knoop hardness test 12) and dynamic mechanical test 3,8,15,16) . Furthermore, glass transition temperature (T g) has great significance from a practical point of view, as polymers generally exhibit a large variation of mechanical properties with temperature.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of glass transition temperature and dynamic mechanical properties of autopolymerized hard direct denture reline resins

Takase

Watanabe

Kurogi

et al. 2015

Dental Materials Journal

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This study assessed methods for evaluation of glass transition temperature (Tg) of autopolymerized hard direct denture reline resins using dynamic mechanical analysis and differential scanning calorimetry in addition to the dynamic mechanical properties. The Tg values of 3 different reline resins were determined using a dynamic viscoelastometer and differential scanning calorimeter, and rheological parameters were also determined. Although all materials exhibited higher storage modulus and loss modulus values, and a lower loss tangent at 37˚C with a higher frequency, the frequency dependence was not large. Tg values obtained by dynamic mechanical analysis were higher than those by differential scanning calorimetry and higher frequency led to higher Tg, while more stable Tg values were also obtained by that method. These results suggest that dynamic mechanical analysis is more advantageous for characterization of autopolymerized hard direct denture reline resins than differential scanning calorimetry.

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“…Although many kinds of autopolymerized hard direct denture reline resins are available for use with the direct method, they have some disadvantages such as unpleasant taste and odor, irritation to the oral mucosa by the monomer, and generation of heat during polymerization [1][2][3][4][5][6] . Furthermore, the stiffness of autopolymerized hard direct denture reline resins is lower than that of heatpolymerized denture base resins [7][8][9] . The mechanical properties of reline resins influence the longevity of the relined denture as well as the denture base resins.…”

Section: Introductionmentioning

confidence: 97%

“…Properties such as setting behavior and mechanical properties are important for evaluation of autopolymerized hard direct denture reline resins, because these influence manipulation when used in a direct method and the service life of dentures, respectively. Many studies of such properties of commercial reline resins have been conducted 4,5,7,8,18,19) . However, scant information is available concerning the relationship between composition and these properties of autopolymerized hard direct denture reline resins.…”

Section: Introductionmentioning

confidence: 99%

Influence of composition and powder/liquid ratio on setting characteristics and mechanical properties of autopolymerized hard direct denture reline resins based on methyl methacrylate and ethylene glycol dimethacrylate

et al. 2014

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We evaluated the influence of composition and powder/liquid (P/L) ratio on the setting characteristics and mechanical properties of autopolymerized hard direct denture reline resins composed of methyl methacrylate (MMA, monomethacrylate) and ethylene glycol dimethacrylate [EGDMA, dimethacrylate (cross-linking agent)], with poly (ethyl methacrylate) used as the powder, and a mixture of MMA and EGDMA containing p-tolyldiethanolamine as the monomer. Setting times were determined using an oscillating rheometer and mechanical properties were based on ISO specifications. Setting time increased exponentially with an increase in the ratio of EGDMA to MMA and decrease in P/L ratio. Materials with a liquid component of approximately 75-85 wt% EGDMA and a higher P/L ratio showed higher ultimate flexural strength and flexural modulus. Our results suggest that setting characteristics are more influenced by the ratio of monomethacrylate and cross-linking agent, whereas mechanical properties are more influenced by P/L ratio.

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Properties of highly cross-linked autopolymerizing reline acrylic resins

Cited by 126 publications

References 16 publications

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

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

Evaluation of glass transition temperature and dynamic mechanical properties of autopolymerized hard direct denture reline resins

Influence of composition and powder/liquid ratio on setting characteristics and mechanical properties of autopolymerized hard direct denture reline resins based on methyl methacrylate and ethylene glycol dimethacrylate

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