Becker C K, Savelberg H H, Buchner H H, Barneveld A
Department of General and Large Animal Surgery, Faculty of Veterinary Medicine, Utrecht University, The Netherlands.
Am J Vet Res. 1998 Mar;59(3):352-8.
To evaluate posttrauma biomechanical behavior of the scar attributable to desmotomy of the accessory ligament of the deep digital flexor tendon (AL-DDFT), compared with the histomorphologic and ultrasonographic appearance.
5 Standardbred trotters.
Gross appearance, length, cross-sectional area (CSA), in vitro material properties, and ultrasonographic and histomorphologic features were studied 6 months after desmotomy. Tensile tests were conducted, with forces and elongation simultaneously recorded. Surgically treated limbs were compared with nontreated contralateral limbs.
The CSA of the treated ligaments was increased threefold, and treated ligaments were 1 cm longer than control ligaments. In the healed AL-DDFT, stress and material stiffness were approximately a third of those values for controls. The functional characteristics, force and elongation at failure, reached 80% of control values. Ultrasonographic and the histomorphologic examination of the scar tissue revealed high amounts of randomly oriented collagen.
From the ultrasonographic and histomorphologic findings and the material properties, it was concluded that the scar tissue was of inferior quality. However, the functional properties had been restored for the most part by increase of the CSA. The length increase may lead to strain relief in the AL-DDFT after desmotomy.
Desmotomy is recommended as treatment for chronic desmitis.
评估与组织形态学和超声表现相比，指深屈肌腱副韧带（AL-DDFT）切断术后瘢痕的创伤后生物力学行为。
5匹标准蹄 trotters。
在切断术后6个月，研究大体外观、长度、横截面积（CSA）、体外材料特性以及超声和组织形态学特征。进行拉伸试验，同时记录力和伸长情况。将手术治疗的肢体与未治疗的对侧肢体进行比较。
治疗后的韧带CSA增加了两倍，且治疗后的韧带比对照韧带长1厘米。在愈合的AL-DDFT中，应力和材料刚度约为对照值的三分之一。功能特性，即失效时的力和伸长，达到对照值的80%。瘢痕组织的超声和组织形态学检查显示大量随机排列的胶原蛋白。
从超声和组织形态学发现以及材料特性来看，得出瘢痕组织质量较差的结论。然而，通过CSA的增加，功能特性在很大程度上已得到恢复。长度增加可能会导致切断术后AL-DDFT的应变缓解。
推荐切断术作为慢性腱炎的治疗方法。
