We used bovine tibiae and two-stranded human anterior tibialis tendon grafts to compare biomechanical properties of two tibial fixation devices, the Milagro Interference Screw (Milagro) and the Bio-Intrafix Soft Tissue Tibial Fixation System (Bio-Intrafix). A total of 24 constructs (12 with each type of fixation) underwent biomechanical testing with 12 matched constructs undergoing uniaxial loading to failure (rate of 1 mm/sec) and the other 12 matched constructs undergoing cyclic loading (10,000 cycles at 1 Hz with a loading range of 125 to 375 N). All constructs failed by slippage of one or both ends of the anterior tibialis graft past the fixation device. One of the six Bio-Intrafix specimens failed before 10,000 cycles; four of the six Milagro specimens failed before 10,000 cycles. Bio-Intrafix, which is designed for a four-stranded graft, provided superior fixation to a traditional bioabsorbable interference screw in a two-stranded soft tissue graft at one of the weakest links in anterior cruciate ligament reconstruction surgery.
展开▼
机译：我们使用牛胫骨和两链人胫骨前肌腱移植物来比较两种胫骨固定装置，Milagro干涉螺钉（Milagro）和Bio-Intrafix软组织胫骨固定系统（Bio-Intrafix）的生物力学特性。总共24个构建体（每种固定类型中的12个）经历了生物力学测试，其中12个匹配的构建体经历了单轴加载到破坏（速率为1 mm / sec），其他12个匹配的构建体经历了循环加载（在1 Hz下10,000个循环，其中负载范围为125到375 N）。所有构造都因胫骨前部移植物的一端或两端滑过固定装置而失败。 6个Bio-Intrafix标本中的1个在10,000次循环之前就失败了。六个Milagro样本中有四个在10,000次循环之前就失败了。 Bio-Intrafix是专为四链移植物设计的，它在前十字韧带重建手术中最薄弱的环节之一，对两链软组织移植物中的传统生物可吸收干扰螺钉提供了出色的固定。
展开▼
