Format

Send to

Choose Destination
J Prosthodont Res. 2018 Jul;62(3):359-364. doi: 10.1016/j.jpor.2018.01.002. Epub 2018 Feb 21.

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.

Author information

1
Department of Dental Biomaterials, Nihon University School of Dentistry at Matsudo, Matsudo, Japan. Electronic address: tanimoto.yasuhiro@nihon-u.ac.jp.
2
Department of Dental Biomaterials, Nihon University School of Dentistry at Matsudo, Matsudo, Japan.

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 20mass%) and pigmentations (0, 1, 2, and 4mass%) 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 2mass% were acceptable for gingival color, and the glass fibers harmonized well with the resins. The ΔE* values of the GFRTPs with pigment contents of 2mass% obtained by using the CIE Lab system were lowest at all fiber loadings. For GFRTPs with fiber contents of 10 and 20mass% at 2mass% pigment content, these GFRTPs surpassed the ISO 20795-1 specification regarding flexural strength (> 60MPa) and modulus (> 1.5GPa).

CONCLUSIONS:

A combination of the results of color difference evaluation and mechanical examination indicates that the GFRTPs with fiber contents of 10 or 20mass%, and with pigment contents of 2mass% have acceptable esthetic appearance and sufficient rigidity for NMCDs.

KEYWORDS:

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

PMID:
29475809
DOI:
10.1016/j.jpor.2018.01.002
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center