A Biomechanical Comparison of the Pullout Strength of No. 2 FiberWire Suture and 2-mm FiberWire Tape in Bovine Rotator Cuff Tendons
A Biomechanical Comparison of the Pullout Strength of No. 2 FiberWire Suture and 2-mm FiberWire Tape in Bovine Rotator Cuff Tendons
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DOI：
10.1016/j.arthro.2010.04.075
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发表时间：
2010-11-01
影响因子：
4.7
通讯作者：
Manohar, Leslie M.
中科院分区：
文献类型：
--
作者：
Bisson, Leslie J.;Manohar, Leslie M.
目的：在牛肩袖模型中以及在隔离状态下，对2号共混物缝线与2 mm共混物胶带进行生物力学比较。研究方法：将10对牛冈下肌标本随机分配至2号共混物缝线或2 mm共混物胶带的简单缝线固定组。对每个样本进行循环测试，然后进行失效载荷测试。测定伸长率、极限拉伸载荷和刚度。记录失效方式。还使用相同方案对分离的缝线样本进行了循环和测试。结果如下：对于肌腱缝线样本，测试显示伸长率（1.44 +/- 0.41 mm v 1.90 +/- 1.15 mm，P = 0.192）或刚度（67 +/- 13 N/mm v 66 +/- 11 N/mm，P = 0.757）没有显着差异。发现极限拉伸载荷具有统计学显著性（168 +/- 73 N vs 184 +/- 83 N，P = 0.046）。两组样本最常见的失效模式是缝线导致肌腱断裂。单独缝线样本的极限拉伸载荷存在显著差异（349 +/- 7 N vs 937 +/- 93 N，P = .001）和刚度（85 +/- 12 N/mm v 218 +/- 20 N/mm，P = 0.002），但不适用于伸长率（0.26 +/- 0.05 mm v 0.19 +/- 0.04 mm，P = 0.124）。结论：在牛肩袖样本中使用所述试验方法，我们发现2种受试缝线之间的极限拉伸载荷、刚度或伸长率无差异。单独对缝线进行的试验表明，2 mm胶带的硬度约为2号缝线的3倍，并且在3倍于2号缝线的载荷下失效。临床相关性：与2号缝线相比，较大的2 mm胶带不会降低肩袖缝线样本的生物力学性能。尽管胶带对肩袖血管分布的影响尚不清楚，但在该体外动物模型中，较大胶带不会对伸长率、极限拉伸载荷或刚度产生负面影响。
Purpose: To biomechanically compare No. 2 polyblend suture with 2-mm polyblend tape in a bovine rotator cuff model as well as in isolation. Methods: Ten paired bovine infraspinatus specimens were randomly assigned to simple suture fixation with either No. 2 polyblend suture or 2-mm polyblend tape. Each specimen was subjected to cyclic testing followed by load-to-failure testing. Elongation, ultimate tensile load, and stiffness were determined. The failure method was recorded. Isolated suture specimens were also cycled and tested with the same protocol. Results: For tendon-suture specimens, testing showed no significant difference for elongation (1.44 +/- 0.41 mm v 1.90 +/- 1.15 mm, P = .192) or stiffness (67 +/- 13 N/mm v 66 +/- 11 N/mm, P = .757). Statistical significance was found for ultimate tensile load (168 +/- 73 N v 184 +/- 83 N, P = .046). The most common mode of failure for both groups of specimens was disruption of the tendon by the suture. Isolated suture specimens showed significant differences for ultimate tensile load (349 +/- 7 N v 937 +/- 93 N, P = .001) and stiffness (85 +/- 12 N/mm v 218 +/- 20 N/mm, P = .002) but not for elongation (0.26 +/- 0.05 mm v 0.19 +/- 0.04 mm, P = .124). Conclusions: Using the described testing method in bovine rotator cuff specimens, we found no difference in ultimate tensile load, stiffness, or elongation between the 2 tested sutures. Testing of the sutures in isolation showed that the 2-mm tape was approximately 3 times as stiff as the No. 2 suture and failed at 3 times the loads of the No. 2 suture. Clinical Relevance: The larger 2-mm tape does not diminish the biomechanical performance of rotator cuff-suture specimens in comparison to No. 2 suture. Although the effect of tape on the vascularity of the rotator cuff is not known, the larger tape does not negatively affect elongation, ultimate tensile load, or stiffness in this in vitro animal model.