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High modulus nanopowder reinforced dimethacrylate matrix composites for dental cement applications
Author(s) -
Wang Yijun,
Lee James J.,
Lloyd Isabel K.,
Wilson Otto C.,
Rosenblum Marc,
Thompson Van
Publication year - 2007
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.31029
Subject(s) - materials science , composite material , filler (materials) , composite number , elastic modulus , modulus
Results from the study of a novel, high modulus nanopowder filled resin composite are presented. This composite is developed to serve (1) as a high stiffness support to all‐ceramic crowns and (2) as a means of joining independently fabricated crown core and veneer layers. Nanosized Al 2 O 3 (average particle size 47 nm) reinforcement provides stiffness across joins. Two systems are examined: Al 2 O 3 with 50:50 bis‐GMA:TEGDMA monomers (ALBT) and Al 2 O 3 with pure TEGDMA (ALT). To obtain higher filler levels, surfactant is used to aid mixing and increase maximum weight percent of nanopowder filler from 72 to 80. The loading level of Al 2 O 3 has significant effects on composite properties. The elastic modulus for cured ALBT systems increases from 4.6 GPa (0 wt % filler) to 29.2 GPa (80 wt % filler). The elastic modulus for cured ALT systems increases from 3.0 GPa (0 wt % filler) to 22.9 GPa (80 wt % filler). Similarly, ALBT hardness increases from 200 MPa (0% filler) to 949 MPa (80 wt % filler), and ALT hardness increases from 93 MPa (0% filler) to 760 MPa (80 wt % filler). Our results indicate that with a generally monodispersed nanosized high modulus filler relatively high elastic modulus resin based composite cements are possible. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res 2007