Structure and properties of methaerylate based dental restorative materials

Cook, Wayne D.; Beech, D. R.; Tyas, Martin J.

doi:10.1016/0142-9612(85)90094-8

Cited by 49 publications

(37 citation statements)

References 59 publications

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“…Synthetic polymers like polymethyl methacrylate (PMMA) are being used in dentistry, primarily as a denture base material dating back to 1930s 1) . The powder and liquid system based on methyl methacrylate (MMA) and PMMA is mixed at varying ratios to attain a minimum polymerization shrinkage and good handling of the resin mix 2) .…”

Section: Introductionmentioning

confidence: 99%

Effect of ethanol treatment on mechanical properties of heat-polymerized polymethyl methacrylate denture base polymer

et al. 2017

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This laboratory study was assessing the nano-mechanical properties (NMP), surface roughness (Sa), and topographic changes caused by ethanol on the surface of heat-polymerized denture base polymers at different time past dough stage. Specimens of heat polymerizing acrylic resin (Interacryl Hot, Interdent, Celje, Slovenia) of size 10×10×3 mm were prepared, wet ground, and polished for uniform smoothness and treated with ethanol in concentrations of 40, 70, and 99.9% for 30, 60, and 120 s and statistical analysis was done. Some statistical significance for Sa were highest with 120 s exposure to 40% ethanol. NMP were the highest for specimens treated with 99.9% ethanol concentration for 120 s, on specimens prepared 30 min past the dough stage. This study suggested that heat-polymerized denture base polymers are prone for changes by ethanol which alters mechanical properties and surface topography. Dough time influenced the ethanol resistance.

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Section: Introductionmentioning

confidence: 99%

Effect of ethanol treatment on mechanical properties of heat-polymerized polymethyl methacrylate denture base polymer

et al. 2017

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“…[1,2,5] The polymer matrix is usually formed by free radical crosslinking polymerization. The combination of various types of dimethacrylate and multimethacrylate monomers is very often used.…”

Section: Introductionmentioning

confidence: 99%

Photocrosslinking Polymerization of Methacrylate Modified Triethoxysilanes Polycondensates and Multifunctional Methacrylates

Pavlineč

Moszner

2003

Macro Materials & Eng

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Densely crosslinked polymer networks were prepared by fast, visible light‐induced polymerization at 20–22 °C. The two methacrylate functionalized triethoxysilanes polycondensates (MSiP) either alone, or in a mixture with methacrylate modified oxozirconium clusters, were polymerized separately and as comonomers to multimethacrylate monomers in a weight ratio of 1:0.9. Pure organic networks based on 1,6‐bis(2‐hydroxy‐3‐methacryloyloxyethoxycarbonylamino)‐2,2,4‐trimethylhexane (UDMA) were used for comparison in the same ratio to other comonomers. The networks based on organic bifunctional monomers showed high, around 85% conversion of double bonds. Nevertheless the non‐reacted monomer that migrates to the toluene amounts from 5.6 to 11.65 wt.‐%. Copolymerization of UDMA with tetrafunctional components resulted in networks with higher residual unsaturation up to 27.7%. This result points out the important role that functionality and the spacer structure between the monomer double bonds play in the extent of reaction. Based only on modified inorganic SiOSi nano‐structures the networks are characterized by nearly complete building up of MSiP in the network, extreme crosslinks density, and mostly less than 1 wt.‐% of soluble substances. However, residual unsaturations exceeded 22%. The advantage of copolymerization of MSiP with proper organic comonomers as potential solvent free matrices for dental composites was demonstrated by a network consisting of MSiP II and UDMA. The 13.7% of unreacted double bonds and 99.65 wt.‐% gel content approximated efforts to minimize residual unsaturation and maximize monomer conversion in cured networks.Monomers used for the synthesis of the densely crosslinked polymer.magnified imageMonomers used for the synthesis of the densely crosslinked polymer.

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“…1,2 Despite this, highly crosslinked dimethacrylates tend to fail in a catastrophic (brittle) manner, so it is desirable to ®nd ways in which these materials can be toughened.…”

Section: Introductionmentioning

confidence: 99%

“…Conventionally, the toughening in dental resins has been achieved by adding a mineral ®ller, typically 70±80% of silane treated silica, 1 which increases the modulus and enhances the fracture toughness by either crack-pinning and/or crack-de¯ection, 3 increasing the crack path-length and therefore the amount of energy absorbed. In addition, the ®ller provides the translucent, tooth-like aesthetics required of these materials.…”

Section: Introductionmentioning

confidence: 99%

Yielding behaviour of rubber and diluent-modified dimethacrylate polymers for use in dental composites

Forrest

Cook

Goodwin³

et al. 2001

Polym. Int.

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Structure and properties of methaerylate based dental restorative materials

Cited by 49 publications

References 59 publications

Effect of ethanol treatment on mechanical properties of heat-polymerized polymethyl methacrylate denture base polymer

Effect of ethanol treatment on mechanical properties of heat-polymerized polymethyl methacrylate denture base polymer

Photocrosslinking Polymerization of Methacrylate Modified Triethoxysilanes Polycondensates and Multifunctional Methacrylates

Yielding behaviour of rubber and diluent-modified dimethacrylate polymers for use in dental composites

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