Flexural Properties of Resin-modified “Hybrid” Glass-ionomers in Comparison with Conventional Acid-base Glass-ionomers

Synthesis and application of a novel star-hyperbranched poly(acrylic acid) for improved dental restoratives

“…The polymer aqueous liquid contains highly concentrated GM-tethered starhyperbranched poly(AA), which not only provides a large quantity of carboxyl groups for salt-bridge formation but also a substantial amount of carbon-carbon double bond (methacrylate) for covalent crosslinks. In contrast, in addition to linear poly(AA) and water, Fuji II LC contains a substantial amount of HEMA (2-hydroxylethyl methacrylate, a low MW monomer) and other low MW methacrylate or dimethacrylate comonomers [13]. These low MW monomers and oligomers led to a lower strength.…”

“…Briefly two main strategies have been applied. One is to incorporate hydrophobic pendent (meth)acrylate moieties onto the polyacid backbone in GIC to make it become light-or redox-initiated resin-modified GIC (RMGIC) [12][13][14][15]17] and the other is to directly increase molecular weight (MW) of the polyacid [16][17][18]. As a result, the former has shown significantly improved tensile and flexural strengths as well as handling properties [12][13][14][15]17].…”

“…Despite numerous advantages of GICs, brittleness, low tensile and flexural strengths have limited the current GICs for use only at certain low stress-bearing sites such as Class III and Class V cavities [1,2]. Much effort has been made to improve the mechanical strengths of GICs [1,4,11] and the focus has been mainly on improvement of polymer backbone or matrix [1,4,11,[12][13][14][15][16][17][18]. Briefly two main strategies have been applied.…”

“…One is to incorporate hydrophobic pendent (meth)acrylate moieties onto the polyacid backbone in GIC to make it become light-or redox-initiated resin-modified GIC (RMGIC) [12][13][14][15]17] and the other is to directly increase molecular weight (MW) of the polyacid [16][17][18]. As a result, the former has shown significantly improved tensile and flexural strengths as well as handling properties [12][13][14][15]17]. The strategy of increasing MW of the polyacid by either introducing amino acid derivatives or N-vinylpyrrolidone has also shown enhanced mechanical strengths [16][17][18]; however, the working properties were somehow decreased because strong chain entanglements formed in these high MW linear polyacids resulted in an increased solution viscosity [16,17].…”

Effect of Metal Priming Agents on Bond Strength of Resin-modified Glass Ionomers Jointed to Gold Alloy

“…2-hydroxyethyl methacrylate and crosslinking monomers) 2) . Hereby mechanical properties such as flexural strength 3) and fracture toughness [4][5][6] , those of RMGICs excel those of conventional glass ionomer cements. Furthermore, RMGICs are easier to remove than conventional glass ionomer cements, clinical reports have demonstrated that RMGICs maintained durable bonding 7,8) .…”