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Influence of filler content on physicomechanical and bonding properties of an experimental dental resin cement

Authors

  • Jie Xiong,

    1. Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China
    2. Department of Stomatology, 307 Hospital, Military Medical Science Academy of the PLA, Beijing, China
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    • *

      The authors contributed equally to this work

  • Xiang Sun,

    1. Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China
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    • *

      The authors contributed equally to this work

  • Jihua Chen,

    Corresponding author
    1. Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China
    • Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China
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  • Lihui Tang

    1. Department of dental materials, School of Stomatology, Fourth Military Medical University, Xi'an, China
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Abstract

To investigate the effects of filler contents on the bonding and physicomechanical properties of experimental dental resin cements and the correlation between them, four groups were formulated with silicon dioxide filler in the following weight percentages: A: 40%, B: 50%, C: 60%, and D: 70%. LuxaCore dental resin cement was used as group E for commercial reference. For testing bond strength, resin cements were applied to the prefabricated dental fiber posts in the artificial teeth canal and photo cured, and then the microtensile bonding strength (BS) between posts and resin cement was measured in sticks of 1 × 1 mm2. For the mechanical properties, flexural strength (FS), diametral tensile strength (DTS), compressive strength (CS), and hardness (H) were tested according to the related standard. Water sorption and solubility were also determined. The results showed both bonding and physicomechanical strengths of the experimental resin cements varied to different extents with filler addition. Positive correlations existed respectively between the filler content and some mechanical properties (rFS = 0.964, rCS = 0.967, and rH = 0.959), whereas no significant correlations were found between the filler content and the other strength values tested in this study (rDTS = 0.321, rBS = 0.014), neither were between bond strength and mechanical properties. The effect of filler content on mechanical properties was more influential and prominent compared to that on bond strength. It is partial to compare properties and to predict clinical behaviors of resin materials based on a single in vitro test, and comprehensive evaluation is necessary. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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