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首页> 外文期刊>Journal of oral rehabilitation >The effect of the addition of poly (methyl methacrylate) fibres on the transverse strength of repaired heat-cured acrylic resin.
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The effect of the addition of poly (methyl methacrylate) fibres on the transverse strength of repaired heat-cured acrylic resin.

机译：添加聚（甲基丙烯酸甲酯）纤维对修复的热固化丙烯酸树脂的横向强度的影响。

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摘要

The aim of the present study was to investigate the effect of addition of an experimental poly (methyl methacrylate) (PMMA) fibre in linear form, 0.75 mm in diameter on the transverse strength of repaired heat-cured poly (methyl methacrylate) denture base material. Specimens of heat-cured PMMA were repaired with an autopolymerizing acrylic resin and an autopolymerizing acrylic resin together with the addition of untreated and surface-treated PMMA fibres in different arrangements. The transverse bend test was carried out using a LIoyd's Instrument Material Testing Machine. From the results, it can be concluded that the box incorporated into the repair joint produced a significant decrease in the moduli of elasticity and rupture which may be due to stress concentration effects. The addition of one layer of untreated PMMA fibres significantly decreased the modulus of rupture. The addition of two layers of untreated fibres produced a slight but statistically non-significant increase in the modulus of rupture. The addition of surface-treated (with butadiene styrene latex emulsion) fibres into the repair complex gave no improvement compared with the addition of untreated fibres in terms of transverse strength. There was an insignificant decrease in the modulus of rupture compared with the untreated fibres.
机译：本研究的目的是研究添加直径为0.75 mm的线形实验聚甲基丙烯酸甲酯（PMMA）纤维对修复的热固化聚甲基丙烯酸甲酯假牙基材的横向强度的影响。用自动聚合的丙烯酸树脂和自动聚合的丙烯酸树脂，并以不同的排列方式添加未处理的和经过表面处理的PMMA纤维，对热固化的PMMA样品进行修复。使用LIoyd的仪器材料测试机进行横向弯曲测试。从结果可以得出结论，合并到修复接头中的盒子使弹性模量和断裂模量显着降低，这可能是由于应力集中效应引起的。一层未处理的PMMA纤维的添加显着降低了断裂模量。添加两层未处理的纤维会导致断裂模量略有增加，但统计上却没有显着增加。与未处理纤维的横向强度相比，向修复复合物中添加表面处理的纤维（丁二烯苯乙烯乳胶乳液）没有改善。与未处理的纤维相比，断裂模量没有明显降低。

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