Mechanical Evaluation of Two Loop Tensioning Methods for Crimp Clamp Extracapsular Stabilization of the Cranial Cruciate Ligament-Deficient Canine Stifle
2006
Moores, A. P. | Beck, A. L. | Jespers, K.J.M. | Wilson, A.M.
To describe a method of tightening nylon loops secured with a crimping system for extracapsular fabello-tibial stabilization of the cranial cruciate ligament-deficient stifle and to compare this with a method using a commercially available tensioning device. In vitro mechanical testing. Fourteen standardized nylon loops were tensioned using a tensioning device and secured with crimp clamps. Another 14 loops were tightened by partially securing the crimp clamp, followed by tightening of the loop by hand, before definitively securing the crimp clamp. Loops were loaded to failure in a materials testing machine. Mean ultimate loads for instrument-tightened and hand-tightened loops were 383.7 and 371.4 N, respectively. Mean stiffness values for instrument-tightened and hand-tightened loops were 59.7 and 59.3 N/mm, respectively. These differences were not significant. The hand tightening method does not affect the mechanical properties of the loop. The hand tightening method described is a valuable technique for unassisted surgeons without access to tensioning devices.
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