Color stability of glass-fiber-reinforced polypropylene for non-metal clasp dentures

• Nagakura Manamu

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

• Tanimoto Yasuhiro

  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 color stability of a glass-fiber-reinforced thermoplastic (GFRTP), for use in non-metal clasp dentures (NMCDs). Methods: GFRTPs composed of E-glass fibers and polypropylene with 2 mass% of pigments were fabricated using injection molding. According to our previous study on the optimum fiber content for GFRTPs, we prepared GFRTPs with fiber contents of 0, 10, and 20 mass% (GF0, GF10, and GF20). Commercially available NMCD and PMMA materials were used as controls. The color changes of GFRTPs at 24 h, and at 1, 2, and 4 weeks of coffee immersion at 37 °C were measured by colorimetry, using the Commission Internationale de l'Eclairage (CIE) Lab system. The color stabilities of the GFRTPs were evaluated in two units: the color difference (ΔE*) and National Bureau of Standards (NBS) units. Results: After immersion, none of the GFRTPs showed visible color change. From the colorimetry measurement using the CIE Lab system, the ΔE* values of the GFRTPs were 0.65–2.45. The NBS values of the GFRTPs were 0.60–2.25, all lower than the threshold level of 3.0, demonstrating clinically acceptable color changes. On the other hand, an available polyamide-based NMCD material exhibited "appreciable" color change, as measured in NBS units. Conclusions: The results indicate that the GFRTPs showed clinically acceptable color stability and might be satisfactory for clinical use. Therefore, GFRTPs are expected to become attractive materials for esthetic dentures.

Journal

• Journal of Prosthodontic Research

  Journal of Prosthodontic Research 62 (1), 31-34, 2018

  Japan Prosthodontic Society

Keywords

• Non-metal clasp denture
• Removable prosthodontics
• Color stability
• Glass-fiber-reinforced thermoplastic

Details

• CRID: 1390282680277182080
• NII Article ID: 130006619318
• DOI: 10.1016/j.jpor.2017.05.007
• ISSN: 18839207
• ISSN: 18831958
• Web Site: https://api.elsevier.com/content/article/PII:S1883195817300518?httpAccept=text/xml
• Web Site: https://api.elsevier.com/content/article/PII:S1883195817300518?httpAccept=text/plain
• Web Site: https://www.jstage.jst.go.jp/article/jpr/62/1/62_JPOR408/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2019130983
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed