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Rheological Properties, Surface Microhardness, and Dentin Shear Bond Strength of Resin-Modified Glass Ionomer Cements Containing Methacrylate-Functionalized Polyacids and Spherical Pre-Reacted Glass Fillers by Thepveera, Whithipa (author);Potiprapanpong, Wisitsin (author);Toneluck, Arnit (author);Channasanon, Somruethai (author);Khamsuk, Chutikarn (author);Monmaturapoj, Naruporn (author);Tanodekaew, Siriporn (author);Panpisut, Piyaphong (author) is a Materials Science article available to read on EtoBox.

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The aim of this study was to prepare experimental resin-modified glass ionomer cements (RMGICs) containing low levels of hydroxyethyl methacrylate (HEMA) for pulp protection. Liquid and powder phases of the experimental RMGICs were polyacid functionalized with methacrylate groups and spherical pre-reacted glass fillers (SPG). Two types of liquid phase containing 0 wt. % HEMA (CM liquid) or 5 wt. % HEMA (CMH liquid) were formulated. The experimental RMGICs were prepared by mixing SPG fillers with CM liquid (F1) or CMH liquid (F2). Rheological properties were examined using a strain-controlled rheometer (n = 5). The Vickers microhardness (n = 5) and dentin shear bond strength (SBS) (n = 10) of the materials were tested. Commercial pulp protection materials (Vitrebond and TheraCal LC) were used as comparisons. The viscosity and surface microhardness of F1 (22 m Pa·s, 18 VHN) and F2 (18 m Pa·s, 16 VHN) were significantly higher than those of Vitrebond (6 mPa·s, 6 VHN) and TheraCal (0.1 mPa·s, 7 VHN). The SBS of F1 (10.7 MPa) and F2 (11.9 MPa) was comparable to that of Vitrebond (15.4 MPa) but higher than that of TheraCal LC (5.6 MPa). The addition of 5 wt. % HEMA showed no significant

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Author

Thepveera, Whithipa (author);Potiprapanpong, Wisitsin (author);Toneluck, Arnit (author);Channasanon, Somruethai (author);Khamsuk, Chutikarn (author);Monmaturapoj, Naruporn (author);Tanodekaew, Siriporn (author);Panpisut, Piyaphong (author)

Publisher

MDPI AG

Published

2021

Language

EN

Field

Materials Science (Physical Sciences)