COMPOSITION OF THE CEMENT LINE AND ITS POSSIBLE MECHANICAL ROLE AS A LOCAL INTERFACE INHUMAN COMPACT-BONE
COMPOSITION OF THE CEMENT LINE AND ITS POSSIBLE MECHANICAL ROLE AS A LOCAL INTERFACE INHUMAN COMPACT-BONE
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DOI：
10.1016/0021-9290(88)90132-7
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发表时间：
1988-01-01
影响因子：
2.4
通讯作者：
FREDERICKSON, RG
中科院分区：
文献类型：
--
作者：
BURR, DB;SCHAFFLER, MB;FREDERICKSON, RG
人体密质骨可以看作是一种纤维增强的复合材料，其中次级骨单位起到纤维增强的作用。骨水泥线是“纤维”（骨单位）和骨外骨基质之间的界面，可赋予密质骨重要的机械性能。这些特性的性质尚不清楚，部分原因是水泥线的成分尚不清楚。本分析采用扫描电子显微镜和X射线微探针分析检查骨水泥线的成分，以解决其作为局部界面的生化功能。分析表明，骨水泥线是一个矿化减少的区域，可能含有硫酸化粘液物质。该成分与骨水泥线提供与周围骨基质的相对韧性界面的假设一致，并且其提供促进裂纹萌生但减缓密质骨中裂纹生长所需的点特异性刚度差异、较差的“纤维”-基质结合和能量传递质量。
Human compact bone may be viewed as a fiber reinforced composite material in which the secondary osteons act as the fiber reinforcements. The cement line, which is the interface between the ''fibers'' (osteons) and extraosteonal bone matrix, may impart important mechanical properties to compact bone. The nature of these properties is not known partly because the composition of the cement line is unknown. This analysis examines the constituents of the osteon cement line using scanning electron microscopy and X-ray microprobe analysis to address its biochemical functions as a local interface. The analysis suggests that the cement line is a region of reduced mineralization which may contain sulfated mucosubstances. This composition is consistent with the hypothesis that the cement line provides a relatively ductile interface with surrounding bone matrix, and that it provides the point specific stiffness differences, poor ''fiber''-matrix bonding and energy transfer qualities required to promote crack initiation but slow crack growth in compact bone.