Suzuki S, Leinfelder K F, Kawai K, Tsuchitani Y
Department of Biomaterials, UAB School of Dentistry, Birmingham 35294-0007, USA.
Am J Dent. 1995 Aug;8(4):173-8.
To evaluate the relationship between filler size, shape, mechanical properties and wear resistance of posterior resin composite was evaluated.
Six UDMA/TEGDMA-based experimental resin composites consisting of different types of filler particles were investigated. These included four sized spherical fillers, (9.88 microns, 2.01 microns, 0.62 micron, 0.20 micron) and two irregular, (9.46 microns, 1.97 microns). Property measurements consisted of hardness and compressive strength. Wear resistance was evaluated by a three-bodied in vitro wear test.
The composites containing the smallest sized spherical particle exhibited maximum mechanical strength and maximum wear resistance. The composites containing the largest spherical particle exhibited minimum wear resistance. There were no significant differences amongst those containing similar sized fillers regardless of particle shape. However, differences between the 0.20 microns spherical filled composite and other composites were statistically significant. SEM analysis showed that only the larger sized filler exhibited some exfoliation after wear testing. The smaller size spherical filler exhibited better mechanical strength and substantially higher wear resistance.
评估后牙树脂复合材料的填料尺寸、形状、机械性能与耐磨性之间的关系。
研究了六种基于UDMA/TEGDMA的实验性树脂复合材料，它们由不同类型的填料颗粒组成。其中包括四种尺寸的球形填料（9.88微米、2.01微米、0.62微米、0.20微米）和两种不规则形状的填料（9.46微米、1.97微米）。性能测量包括硬度和抗压强度。通过三体体外磨损试验评估耐磨性。
含有最小尺寸球形颗粒的复合材料表现出最大的机械强度和最大的耐磨性。含有最大球形颗粒的复合材料表现出最小的耐磨性。无论颗粒形状如何，含有相似尺寸填料的复合材料之间没有显著差异。然而，0.20微米球形填料填充的复合材料与其他复合材料之间的差异具有统计学意义。扫描电子显微镜分析表明，只有较大尺寸的填料在磨损试验后出现了一些剥落。较小尺寸的球形填料表现出更好的机械强度和显著更高的耐磨性。
