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.
J Prosthodont Res
; 62(3): 359-364, 2018 Jul.
Article
em En
| MEDLINE
| ID: mdl-29475809
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.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Polipropilenos
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Pigmentação
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Grampos Dentários
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Planejamento de Prótese Dentária
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Pigmentação em Prótese
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Cor
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Maleabilidade
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Materiais Dentários
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Prótese Parcial Removível
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Vidro
Idioma:
En
Revista:
J Prosthodont Res
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2018
Tipo de documento:
Article