Wear Behavior of Nanofilled Resin Composites

  • MORI Kentaro
    Department of Operative Dentistry, Nihon University School of Dentistry
  • TAKAMIZAWA Toshiki
    Department of Operative Dentistry, Nihon University School of Dentistry:Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
  • OTSUKA Eiichiro
    Department of Operative Dentistry, Nihon University School of Dentistry
  • ENDO Hajime
    Department of Operative Dentistry, Nihon University School of Dentistry
  • MAEDA Toru
    Department of Operative Dentistry, Nihon University School of Dentistry
  • YAMAJI Ayumi
    Department of Operative Dentistry, Nihon University School of Dentistry
  • OGURA Yukari
    Department of Operative Dentistry, Nihon University School of Dentistry
  • TSUBOTA Keishi
    Department of Operative Dentistry, Nihon University School of Dentistry:Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
  • MIYAZAKI Masashi
    Department of Operative Dentistry, Nihon University School of Dentistry:Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
  • LATTA Mark A.
    General Dentistry, Creighton University School of Dentistry

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Other Title
  • ナノフィラーを応用したコンポジットレジンのwear挙動

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Description

The mechanism of the wear behavior of resin composites is complex and many studies have been conducted to clarify this phenomenon. Manufacturers have focused on filler loading, filler type, filler size, filler distribution and filler surface treatment in order to improve the wear resistance of resin composites. Recently, newly developed resin composites including nanofiller particles have been introduced in the market, but their wear behavior is not yet fully understood. The purpose of this study was to elucidate the wear behavior of nanofilled resin composites by using tooth brushing abrasion and impact-sliding wear testing. The results were as follows: 1. Filler loading, filler type and filler size of the tested materials were different, and they were classified into nanohybrid resin composites and nanofill resin composites. 2. From the results of the tooth brushing abrasion test, nanohybrid resin composites showed a significantly lower abrasion rate than nanofill composites. However, changes in the surface texture and surface roughness of nanohybrid resin composites significantly increased after the brushing test. 3. From the results of the impact-sliding wear test, nanohybrid resin composites showed a significantly lower wear rate than nanofill resin composites. From observations of the surface texture of antagonist, small scratches were found in the nanohybrid resin composites group.

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