Influence of water sorption on mechanical properties of injection-molded thermoplastic denture base resins
Influence of water sorption on mechanical properties of injection-molded thermoplastic denture base resins
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DOI：
10.3109/00016357.2014.919662
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发表时间：
2014-11-01
影响因子：
2
通讯作者：
Takahashi, Yutaka
中科院分区：
文献类型：
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作者：
Hamanaka, Ippei;Iwamoto, Misa;Takahashi, Yutaka
目标。研究了吸水性对注射成型热塑性义齿基托树脂某些力学性能的影响。材料和方法。选择六种热塑性树脂（两种聚酰胺、两种聚酯、一种聚碳酸酯、一种聚甲基丙烯酸甲酯）和一种聚甲基丙烯酸甲酯（PMMA）传统热聚合义齿基聚合物作为对照。每种义齿基托材料的标本按照ISO 1567规范制作，干燥或水浸30天（n = 10）。计算了义齿基托材料的极限抗弯强度、比例极限抗弯强度和弹性模量。结果。吸水率显著降低了聚酰胺和pmma的极限抗弯强度、比例极限抗弯强度和弹性模量。它还显著提高了聚碳酸酯的极限抗弯强度。结论。某些注射成型热塑性义齿基托树脂在吸水后的力学性能发生了变化。
Objective. This study investigated the influence of water sorption on certain mechanical properties of injection-molded thermoplastic denture base resins. Materials and methods. Six thermoplastic resins (two polyamides, two polyesters, one polycarbonate, one polymethylmethacrylate) and a polymethylmethacrylate (PMMA) conventional heat-polymerized denture-based polymer, selected as a control, were tested. Specimens of each denture base material were fabricated according to ISO 1567 specifications and were either dry or water-immersed for 30 days (n = 10). The ultimate flexural strength, the flexural strength at the proportional limit and the elastic modulus of the denture base materials were calculated. Results. Water sorption significantly decreased the ultimate flexural strength, the flexural strength at the proportional limit and the elastic modulus of one of the polyamides and the PMMAs. It also significantly increased the ultimate flexural strength of the polycarbonate. Conclusion. The mechanical properties of some injection-molded thermoplastic denture base resins changed after water sorption.