弹性韧带的超微结构与力学特性

The ultrastructure and mechanics of elastic ligaments.

作者信息

Serafini-Fracassini A, Field J M

出版信息

Adv Exp Med Biol. 1977;79:97-103. doi: 10.1007/978-1-4684-9093-0_9.

Abstract

The major central part of elastic ligaments is constituted by longitudinally orientated elastic fibres, each surrounded by a sheath of spirally orientated collagen fibrils with an intervening thin layer of microfibrils. In the terminal region of such ligaments the orientation of the collagen fibrils is longitudinal and the elastic fibres end within the ligament without any attachment to bone. The ligament response to a first, unphysiologically high load produces a continuous stress-strain curve. On the other hand the curve becomes biphasic after repeated application of such loads. It is suggested that three factors are involved in this mechanical response, namely, frictional forces between elastic fibres and their sheaths, compressive forces exerted upon elastic fibres by their sheaths, and intre-sheath friction due to rearrangement of the constituent collagen fibrils.

摘要

弹性韧带的主要中央部分由纵向排列的弹性纤维构成，每根弹性纤维都被一层螺旋状排列的胶原纤维鞘所包围，其间有一层薄薄的微纤维层。在这类韧带的末端区域，胶原纤维呈纵向排列，弹性纤维在韧带内终止，不与骨骼附着。韧带对第一次非生理性高负荷的反应产生一条连续的应力-应变曲线。另一方面，在反复施加这种负荷后，曲线会变成双相的。有人认为，这种力学反应涉及三个因素，即弹性纤维与其鞘之间的摩擦力、鞘对弹性纤维施加的压缩力以及由于组成胶原纤维的重新排列而产生的鞘内摩擦力。