Reinforcement of denture base resin with short-rod glass fiber
Reinforcement of denture base resin with short-rod glass fiber
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DOI：
10.4012/dmj.26.733
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发表时间：
2007-09-01
影响因子：
2.5
通讯作者：
Hayakawa, Iwao
中科院分区：
文献类型：
--
作者：
Nakamura, Miho;Takahashi, Hidekazu;Hayakawa, Iwao
研究了使用小颗粒聚甲基丙烯酸甲酯(PMMA)粉末在义齿基托树脂中制备高短棒纤维含量的可行性。研究了纤维含量对复合树脂力学性能的影响，选择了商用义齿基托PMMA粉末(AC，平均粒径150 g)和工业PMMA粉末(MB，平均粒径4 g)。将短棒玻璃纤维与这两种粉末以0~50%的质量比混合。通过三点弯曲试验评价了复合材料的弯曲强度和弹性模量，发现AC复合材料的弯曲强度与纤维含量无关，而MB复合材料的弯曲强度在纤维含量超过40%时显著增加。当纤维含量超过20%时，AC和MB复合材料的弯曲弹性模量分别显著高于不含短棒玻璃纤维的AC和MB树脂。
The present study investigated the feasibility of a high short-rod fiber content in denture base resins using polymethylmethacrylate (PMMA) powder with a small particle diameter. The effects of fiber contents on mechanical properties of composite resins were studied.A commercial denture base PMMA powder (AC; average particle size, 150 gm) and an industrial PMMA powder (MB; average particle size, 4 gm) were selected. Short-rod glass fibers were mixed with the two powders at a mass ratio of 0-50 %. Flexural strengths and moduli of the mixtures were evaluated by a three-point bending test.The flexural strength of AC composites did not change regardless of fiber content, while that of MB composites increased significantly at fiber contents exceeding 40%. The flexural moduli of AC and MB composites at fiber contents exceeding 20% were significantly greater than those of AC and MB resins without short-rod glass fibers, respectively.