Improvement of the setting properties of mineral trioxide aggregate cements using cellulose nanofibrils

  • OKUDA Hiroki
    Department of Pulp Biology and Endodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
  • INADA Miki
    Center of Advanced Instrumental Analysis, Kyushu University
  • KONISHI Tomoya
    Department of Creative Engineering, National Institute of Technology, Anan College
  • KAWASHIMA Nobuyuki
    Department of Pulp Biology and Endodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
  • WADA Takahiro
    Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
  • OKIJI Takashi
    Department of Pulp Biology and Endodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
  • UO Motohiro
    Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University

抄録

<p>Cellulose nanofibrils (CNFs) exhibit excellent mechanical properties and are used to reinforce various composites. The effects of incorporating CNFs into commercial mineral trioxide aggregate (MTA) cements (NEX MTA (NEX) and ProRoot® MTA (PR)) on the underwater setting properties, compressive strength, and flowability were estimated in this study. NEX mixed without CNFs disintegrated after water immersion. NEX mixed with CNF-suspended solutions showed good setting properties under water immersion and a similar compressive strength, which was kept in air (100% relative humidity). PR did not degrade after water immersion, regardless of the presence of CNFs, and no significant difference in the compressive strength caused by CNFs incorporation was detected. The relative flowability of the NEX mixture decreased with increasing CNFs content up to 1.0 w/v%. The application of CNF-incorporated MTA in various dental cases is promising because CNFs prevent the water-immersion-dependent collapse of some MTA cements immediately after mixing.</p>

収録刊行物

  • Dental Materials Journal

    Dental Materials Journal 43 (1), 106-111, 2024-01-25

    一般社団法人 日本歯科理工学会

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