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
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
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用于无金属可摘局部义齿的玻璃纤维增强热塑性塑料：纤维负载和色素沉着对色差和弯曲性能的综合影响
DOI：
10.1016/j.jpor.2018.01.002
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发表时间：
2018
影响因子：
3.6
通讯作者：
Norihiro Nishiyama
中科院分区：
文献类型：
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作者：
Yasuhiro Tanimoto;Manamu Nagakura;Norihiro Nishiyama
目的：本研究的目的是研究纤维负载和色素沉着对用于非金属卡扣义齿 (NMCD) 的玻璃纤维增强热塑性塑料 (GFRTP) 的色差和弯曲性能的综合影响。方法：GFRTP 主要由无碱玻璃纤维、聚丙烯基质和着色颜料组成：GFRTP 具有 通过注射成型制备不同的纤维含量（0、10和20质量%）和色素（0、1、2和4质量%）。 GFRTP 的色差是根据国际照明委员会 (CIE) 实验室颜色系统测量的，并与市售的 NMCD 进行比较。根据国际标准组织 (ISO) 规范编号 20795-1，通过三点弯曲测试评估 GFRTP 的弯曲性能。结果：颜料含量为 2 质量％的 GFRTP 的可见颜色符合牙龈颜色，并且玻璃纤维与树脂协调良好。使用 CIE Lab 系统获得的颜料含量为 2 质量％的 GFRTP 的 ΔE* 值在所有纤维负载量下最低。对于纤维含量为 10 和 20 质量％、颜料含量为 2 质量％的 GFRTP，这些 GFRTP 的弯曲强度 (> 60 MPa) 和模量 (> 1.5 GPa) 超过了 ISO 20795-1 规范。结论：色差评估和机械检验结果相结合表明，纤维含量为 10 或 20 质量％、颜料含量为 2 质量％的 GFRTP 具有良好的性能。 NMCD 具有可接受的美观外观和足够的刚性。
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.