Hodosh M, Gettleman L, Shklar G
J Biomed Mater Res. 1978 Mar;12(2):167-79. doi: 10.1002/jbm.820120204.
A study has been carried out on the surface texture and the strength of several dental implant materials composed of vitreous carbon microballoons (6, 24, and 48 wt %)and poly(methyl methacrylate). Two sizes of microballoons were used--particle size less than 100 micrometer and particle size greater than 100 micrometer. Square wafers of the materials (10 X 10 X 1 mm) were studied with the surface sandblasted in half of the specimens. SEM studies revealed a rough porous surface with scattered moderately sized deep cavities in the 6% and 24% specimens with an increase in the number of cavities in the 24% specimens. The 48% specimens revealed a rough, porous surface composed of large shallow craters. Prepared specimens of the materials, processed by a gas-fired air oven and by a microwave oven, were tested for compressive strength and tensile strength using an Instron Universal Testing Machine. Compressive strengths of the various mixtures were similar, but mixtures using VC particle size over 100 micrometer demonstrated somewhat reduced compressive strength. Tensile strengths of the mixutres decreased significantly as the amount of VC increased, with a 20% reduction at 24 wt % and a 45% reduction at 48 wt %.
对几种由玻璃碳微球（6重量%、24重量%和48重量%）和聚甲基丙烯酸甲酯组成的牙科植入材料的表面纹理和强度进行了一项研究。使用了两种尺寸的微球——粒径小于100微米和粒径大于100微米。对材料的方形薄片（10×10×1毫米）进行了研究，其中一半试样的表面经过喷砂处理。扫描电子显微镜研究显示，6%和24%的试样表面粗糙多孔，有分散的中等尺寸深腔，24%的试样中腔的数量增加。48%的试样显示出由大的浅坑组成的粗糙多孔表面。使用英斯特朗万能试验机对通过燃气空气炉和微波炉处理的材料制备试样进行抗压强度和抗拉强度测试。各种混合物的抗压强度相似，但使用粒径超过100微米的玻璃碳颗粒的混合物抗压强度有所降低。随着玻璃碳含量的增加，混合物的抗拉强度显著降低，在24重量%时降低20%，在48重量%时降低45%。
