Glass fiber-reinforced thermoplastics for use in metal-free removable partial dentures: combined effects of fiber loading and pigmentation on color differences and flexural properties

• Tanimoto Yasuhiro

  Department of Dental Biomaterials, Nihon University School of Dentistry at Matsudo

• Nagakura Manamu

  Department of Dental Biomaterials, Nihon University School of Dentistry at Matsudo

• Nishiyama Norihiro

  Department of Dental Biomaterials, Nihon University School of Dentistry at Matsudo

Abstract

Purpose: The purpose of this study was to investigate the combined effects of fiber loading and pigmentation on the color differences and flexural properties of glass fiber-reinforced thermoplastics (GFRTPs), for use in non-metal clasp dentures (NMCDs). Methods: The GFRTPs consisted mainly of E-glass fibers, a polypropylene matrix, and a coloring pigment: the GFRTPs with various fiber loadings (0,10, and 20 mass%) and pigmentations (0,1, 2, and 4 mass%) were fabricated by using an injection molding. The color differences of GFRTPs were measured based on the Commission Internationale de l'Eclairage (CIE) Lab color system, by comparing with a commercially available NMCD. The flexural properties of GFRTPs were evaluated by using a three-point bending test, according to International Standards Organization (ISO) specification number 20795-1. Results: The visible colors of GFRTPs with pigment contents of 2 mass% were acceptable for gingival color, and the glass fibers harmonized well with the resins. The ΔE^* values of the GFRTPs with pigment contents of 2 mass% obtained by using the CIE Lab system were lowest at all fiber loadings. For GFRTPs with fiber contents of 10 and 20 mass% at 2 mass% pigment content, these GFRTPs surpassed the ISO 20795-1 specification regarding flexural strength (> 60 MPa) and modulus (> 1.5 GPa). Conclusions: A combination of the results of color difference evaluation and mechanical examination indicates that the GFRTPs with fiber contents of 10 or 20 mass%, and with pigment contents of 2 mass% have acceptable esthetic appearance and sufficient rigidity for NMCDs.

Journal

• Journal of Prosthodontic Research

  Journal of Prosthodontic Research 62 (3), 359-364, 2018

  Japan Prosthodontic Society

Keywords

• Non-metal clasp dentures
• Removable prosthodontics
• Glass
• fiber-reinforced thermoplastics
• Color differences
• Flexural properties

Details

• CRID: 1390564238016495744
• NII Article ID: 130007458232
• DOI: 10.1016/j.jpor.2018.01.002
• ISSN: 18839207
• ISSN: 18831958
• Web Site: https://api.elsevier.com/content/article/PII:S1883195818300021?httpAccept=text/xml
• Web Site: https://api.elsevier.com/content/article/PII:S1883195818300021?httpAccept=text/plain
• Web Site: https://www.jstage.jst.go.jp/article/jpr/62/3/62_359/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2019355125
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed