Mechanics of avian fibrous periosteum: Tensile and adhesion properties during growth
Mechanics of avian fibrous periosteum: Tensile and adhesion properties during growth
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DOI：
10.1016/s8756-3282(98)00035-0
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发表时间：
1998-06-01
期刊：
影响因子：
4.1
通讯作者：
Cullinane, DM
中科院分区：
文献类型：
--
作者：
Bertram, JEA;Polevoy, Y;Cullinane, DM
我们报告的结果直接机械测试的纤维骨膜从胫骨白色来航鸡在4，6，8，9，10，11，12，和14周龄使用一种新开发的样品分离技术。此外，该技术允许确定纤维骨膜的表观体内载荷。骨膜在各个年龄段都具有高度非线性的应力-应变关系。对于低于体内le，el的载荷，骨膜是柔韧的，平均拉伸模量为3.35 MPa（+/-1.84 SD，n = 75）。对于高于体内水平的载荷，拉伸刚度几乎大两个数量级。在高刚度区域，平均模量为229.5 MPa（+/-89.6，n = 72）。在体内，骨膜在这两个刚度区域之间的过渡处加载。我们认为这表明，在体内，骨膜的胶原纤维是对齐的，但受到最小的负荷。对应于体内条件的骨膜应力水平表明适度载荷，平均表观副应力水平为0.92 MPa（+/-0.37 SD，n = 67）。第二种技术证明骨干区域（1-6周龄）的骨膜粘连最小，但干骺端区域的骨膜粘连很大。干骺端粘连将影响骺板之间的载荷传递。这些研究表明，纤维骨膜的生长遵循骨的纵向生长，而不是骨膜对生长板活动具有直接的机械影响。生长过程中拉伸性能的比较表明，在生长期的早期，骨膜刚度显著增加，在生长后期（14周），随着生长速度的下降，骨膜硬度也有明显的下降。这表明骨膜胶原蛋白mag的基本性质在该组织的生物功能寿命过程中（即，在长骨生长期间）经历转变。(C)1998年，Elsevier Science Inc. All rights reserved.
We report the results of direct mechanical tests of the fibrous periosteum from the tibiotarsi of white leghorn chicks at 4, 6, 8, 9, 10, 11, 12, and 14 weeks of age using a newly developed sample isolation technique. Additionally, this technique allows the determination of the apparent in vivo load an the fibrous periosteum. The periosteum has a highly nonlinear stress-strain relationship at all ages. For loading below the in vivo le, el, the periosteum is pliant and mean tensile modulus is 3.35 MPa (+/-1.84 SD, n = 75). For loading above the in vivo level, tensile stiffness is nearly two orders of magnitude greater. In the region of high stiffness, mean modulus is 229.5 MPa (+/-89.6, n = 72), In vivo, the periosteum is loaded at the transition between these two stiffness regions. We interpret this as indicating that, in vivo, the collagen fibers of the periosteum are aligned, but subject to minimal loading. Stress levels in the periosteum corresponding to in vivo conditions indicate modest loading, and mean apparent in vice stress levels are 0.92 MPa (+/-0.37 SD, n = 67), A second technique demonstrated that the adhesion of the periosteum in the diaphyseal region (1-6 weeks of age) is minimal, but is substantial in the metaphyseal region. The metaphyseal adhesion will affect the transmission of load between the physes, These studies suggest that growth of the fibrous periosteum follows the longitudinal growth of the bone, rather than the periosteum having a direct mechanical influence on growth plate activity, Comparison of tensile properties over the course of growth indicates a substantial increase in periosteal stiffness in the early portion of the growth period, which reaches a maximum at approximately 9 weeks posthatching, There is also a marked decline in periosteal stiffness as growth rate declines in the latest stages of growth (14 weeks). This suggests that the basic properties of periosteal collagen mag undergo a transition during the course of this tissue's bl ief functional lifetime; that is, during long bone growth. (C) 1998 by Elsevier Science Inc. All rights reserved.