Flexural strength of heat-polymerized polymethyl methacrylate denture resin reinforced with glass, aramid, or nylon fibers
Flexural strength of heat-polymerized polymethyl methacrylate denture resin reinforced with glass, aramid, or nylon fibers
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DOI：
10.1067/mpr.2001.118564
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发表时间：
2001-10-01
影响因子：
4.6
通讯作者：
Shah, I
中科院分区：
文献类型：
--
作者：
John, J;Gangadhar, SA;Shah, I
问题陈述。尽管传统的聚甲基丙烯酸甲酯作为义齿基托材料具有良好的性能，但其抗断裂性能仍有待提高。本体外研究旨在确定市售热聚合丙烯酸义齿基托材料的弯曲强度是否可以通过3种纤维增强来提高。材料和方法。为4个实验组中的每一个制备10个相似尺寸的样本：常规丙烯酸树脂和用玻璃、芳族聚酰胺或尼龙纤维增强的相同树脂。用3点弯曲试验评价弯曲强度。采用单因素方差分析对结果进行分析。所有增强的试样表现出更好的弯曲强度比传统的丙烯酸树脂。玻璃纤维增强材料的弯曲强度最高，芳纶纤维次之，尼龙纤维最低。在本研究的限制范围内，用玻璃或芳族聚酰胺纤维增强后，热聚合PMMA假牙树脂的弯曲强度得到提高。这可能是可能的，这些结果适用于远端延伸部分义齿基托和临时固定部分义齿。
Statement of problem. Despite the favorable properties of conventional PMMA used as a denture base material, its fracture resistance could be improved.Purpose. This in vitro study was performed to determine whether the flexural strength of a commercially available, heat-polymerized acrylic denture base material could be improved through reinforcement with 3 types of fibers.Material and methods. Ten specimens of similar dimensions were prepared for each of the 4 experimental groups: conventional acrylic resin and the same resin reinforced with glass, aramid, or nylon fibers. Flexural strength was evaluated with a 3-point bending test. The results were analyzed with a 1-way analysis of variance.Results. All reinforced specimens showed better flexural strength than the conventional acrylic resin. Specimens reinforced with glass fibers showed the highest flexural strength, followed by aramid and nylon.Conclusion. Within the limitations of this study, the flexural strength of heat-polymerized PMMA denture resin was improved after reinforcement with glass or aramid fibers. It may be possible to apply these results to distal extension partial denture bases and provisional fixed partial dentures.