Dickey J P, Bednar D A, Dumas G A
Department of Mechanical Engineering, Queen's University, Kingston, Ontario, Canada.
Spine (Phila Pa 1976). 1996 Dec 1;21(23):2720-7. doi: 10.1097/00007632-199612010-00004.
Repeated in vitro mechanical tests were performed on porcine and human interspinous ligament specimens with progressive disruption of the collagen fiber network to evaluate the existence of mechanical interactions between collagen fibers.
To evaluate the existence of a load pathway in the interspinous ligament whereby loads are transmitted between collagen fibers.
Mechanical tests demonstrate that the interspinous ligament resists spinal flexion, but the collagen fibers are not oriented to oppose separation of the spinous processes. This seeming contradiction could be explained by the existence of mechanical interactions between collagen fibers of the interspinous ligament.
In vitro mechanical tests were performed on porcine and human bone-interspinous ligament-bone specimens. The collagen network of the ligament substance was disrupted by passing a scalpel blade though the ligament substance. Repeated tests were performed with progressive disruption of the collagen fiber network.
The stiffness of the interspinous ligament specimens was reduced as the collagen fiber network was disrupted, but approximately half of the initial stiffness was maintained when the collagen fiber network was severely disrupted. In this case, no intact collagen fibers remained.
Mechanical interactions exist between collagen fibers in the interspinous ligament. The mechanism of the interactions is unknown.
对猪和人类棘间韧带标本进行反复的体外力学测试，使胶原纤维网络逐渐破坏，以评估胶原纤维之间力学相互作用的存在情况。
评估棘间韧带中是否存在一种负荷传递途径，通过该途径负荷可在胶原纤维之间传递。
力学测试表明棘间韧带可抵抗脊柱屈曲，但胶原纤维的排列方向并非与棘突分离方向相反。这种明显的矛盾可以通过棘间韧带胶原纤维之间存在力学相互作用来解释。
对猪和人类骨-棘间韧带-骨标本进行体外力学测试。通过用手术刀穿过韧带组织来破坏韧带组织的胶原网络。随着胶原纤维网络的逐渐破坏进行反复测试。
随着胶原纤维网络的破坏，棘间韧带标本的刚度降低，但当胶原纤维网络严重破坏时，仍保持约一半的初始刚度。在这种情况下，没有完整的胶原纤维留存。
棘间韧带的胶原纤维之间存在力学相互作用。相互作用的机制尚不清楚。
