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首页> 外文会议>International Conference on Manufacturing Science and Technology >Influence of Al_2O_3 as Filler Loading on the Fracture Toughness of Light-Cured Dental Resin Composites
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Influence of Al_2O_3 as Filler Loading on the Fracture Toughness of Light-Cured Dental Resin Composites

机译：Al_2O_3作为填料加载对光固化牙科树脂复合材料断裂韧性的影响

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摘要

The purpose of the present study was to evaluate the effect of filler loading on the fracture toughness of light-cured dental resin composites (DRCs). The monomer Bis-GMA and TEGDMA (75/25 wt/wt) were mixed with treated micro-sized aluminum oxide (Al_2O_3) particles ranging from 40-60 wt% as filler. The composite samples were cured with LED for 80s. The bulk density (g/cm~3) and apparent porosity (%) of the samples were determined according to the ASTM standard. The fracture toughness (K_(IC)) values of the composites were determined using a single edge notched specimen in the three-point bending test. There was a significant difference in K_(IC) of the composites with different loading of Al_2O_3 particles (p < 0.05). The highest amount of filler (60 wt%) reduced the K_(IC) value to 1.5 MPa·m~(1/2). As a conclusion, the Al_2O_3 particles used as filler loading does have an effect on the mechanical properties of DRCs.
机译：本研究的目的是评估填料加载对光固化牙科树脂复合材料（DRC）的断裂韧性的影响。将单体BIS-GMA和TEGDMA（75/25重量/重量）与处理的微尺寸氧化铝（Al_2O_3）颗粒混合，范围为40-60wt％作为填料。将复合样品用LED固化80s。根据ASTM标准测定样品的堆积密度（G / cm〜3）和表观孔隙率（％）。在三点弯曲试验中使用单边缘缺口样品测定复合材料的断裂韧性（K_（IC））。复合材料的K_（IC）具有不同负载的α0_3颗粒（P <0.05）存在显着差异。最高量的填料（60wt％）将K_（IC）值还原为1.5MPa·m〜（1/2）。作为结论，用作填料负载的Al_2O_3颗粒对DRC的机械性能产生影响。

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