Fabrication and physical properties of glass-fiber-reinforced thermoplastics for non-metal-clasp dentures
Fabrication and physical properties of glass-fiber-reinforced thermoplastics for non-metal-clasp dentures
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非金属卡环义齿用玻璃纤维增强热塑性塑料的制备和物理性能
DOI：
10.1002/jbm.b.33761
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
Norihiro Nishiyama
中科院分区：
文献类型：
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作者：
Manamu Nagakura;Yasuhiro Tanimoto;Norihiro Nishiyama
近年来，由聚酰胺、聚酯、聚碳酸酯和聚丙烯等热塑性树脂制成的非金属卡环义齿（nmcd）已被用作可摘局部义齿（rpd）。然而，由于这种rpd的低刚性，其使用会严重影响各种组织。在这项研究中，我们制造了用于rpd的高刚性玻璃纤维增强热塑性塑料（GFRTPs），并测试了它们的物理性能，如表观密度、动态硬度和弯曲性能。采用注射成型的方法制备了由E -玻璃纤维和聚丙烯制成的GFRTPs。研究了玻璃纤维含量分别为0、5、10、20、30、40和50%质量%时，纤维含量对GFRTP性能的影响。以市售义齿基托材料和NMCD材料为对照。不同纤维含量GFRTPs的实验密度与理论密度基本一致。动态微压痕测试证实，纤维含量不会影响GFRTP的表面性能，如动态硬度和弹性模量，因为大多数增强玻璃纤维都嵌入聚丙烯中。当玻璃纤维含量从0质量%增加到50%质量%时，抗弯强度从55.8 MPa增加到217.6 MPa。当玻璃纤维含量从0质量%增加到50质量%时，抗弯模量从1.75 GPa增加到7.42 GPa，即纤维含量为50质量%时，GFRTP的抗弯强度和模量分别是未增强聚丙烯的3.9倍和4.2倍。这些结果表明，纤维增强具有有益的效果，GFRTPs的物理性能优于对照，可以用于nmcd。©2016 Wiley期刊公司[J]中国生物医学工程学报，2016,31(2):554 - 556。
Recently, non‐metal‐clasp dentures (NMCDs) made from thermoplastic resins such as polyamide, polyester, polycarbonate, and polypropylene have been used as removable partial dentures (RPDs). However, the use of such RPDs can seriously affect various tissues because of their low rigidity. In this study, we fabricated high‐rigidity glass‐fiber‐reinforced thermoplastics (GFRTPs) for use in RPDs, and examined their physical properties such as apparent density, dynamic hardness, and flexural properties. GFRTPs made from E‐glass fibers and polypropylene were fabricated using an injection‐molding. The effects of the fiber content on the GFRTP properties were examined using glass‐fiber contents of 0, 5, 10, 20, 30, 40, and 50 mass%. Commercially available denture base materials and NMCD materials were used as controls. The experimental densities of GFRTPs with various fiber contents agreed with the theoretical densities. Dynamic micro‐indentation tests confirmed that the fiber content does not affect the GFRTP surface properties such as dynamic hardness and elastic modulus, because most of the reinforcing glass fibers are embedded in the polypropylene. The flexural strength increased from 55.8 to 217.6 MPa with increasing glass–fiber content from 0 to 50 mass%. The flexural modulus increased from 1.75 to 7.42 GPa with increasing glass–fiber content from 0 to 50 mass%, that is, the flexural strength and modulus of GFRTP with a fiber content of 50 mass% were 3.9 and 4.2 times, respectively, those of unreinforced polypropylene. These results suggest that fiber reinforcement has beneficial effects, and GFRTPs can be used in NMCDs because their physical properties are better than those of controls. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2254–2260, 2017.