Department of Orthopaedic Surgery, University of Connecticut Health Center, New England Musculoskeletal Institute, Farmington, CT, USA.
Am J Sports Med. 2010 Jun;38(6):1246-9. doi: 10.1177/0363546509359061. Epub 2010 Mar 5.
The semitendinosus tendon has a broad and thin length of aponeurosis. Tubularizing this portion of the graft converts it into a cylindrical structure, which may have implications for graft fixation.
A tubularized semitendinosus tendon will demonstrate a higher tensile load to failure and increased stiffness compared with its native form.
Controlled laboratory study.
Twenty cadaveric paired semitendinosus specimens were used. Ten served as the control group; the other 10 underwent tubularization along the length of the aponeurosis. All testing was performed on the MTS 858 Mini Bionix II. Outcome measures included cross-sectional area, stress, stiffness, and peak load to failure.
The nontubularized tendons had a higher peak tensile load to failure (mean 1112.6 +/- 345.0 N) than the tubularized tendons (mean 711.4 +/- 228.7 N, P = .007). The nontubularized specimens also had a higher stiffness (213.0 +/- 37.2 N) than the tabularized group (144.9 +/- 44.8 N, P = .002).
Tubularization of the semitendinosus graft weakens its structural and mechanical properties.
On the basis of the results of this study, we do not tubularize the semitendinosus graft in ACL reconstruction because of weakened structural and mechanical properties.
半腱肌腱有一个宽阔而薄的腱膜。将该移植物的这部分管状化可将其转化为圆柱形结构，这可能对移植物固定有影响。
与天然形式相比，管状化的半腱肌腱在失效时的拉伸负荷和刚度都会增加。
对照实验室研究。
使用 20 对尸体半腱肌腱标本。其中 10 个作为对照组；另外 10 个沿腱膜的长度进行管状化。所有测试均在 MTS 858 Mini Bionix II 上进行。测量的结果包括横截面积、应力、刚度和失效时的峰值负荷。
未管状化的肌腱在失效时的最大拉伸负荷（平均 1112.6 ± 345.0 N）高于管状化的肌腱（平均 711.4 ± 228.7 N，P =.007）。未管状化的标本也具有更高的刚度（213.0 ± 37.2 N），高于管状化组（144.9 ± 44.8 N，P =.002）。
半腱肌腱移植物的管状化削弱了其结构和机械性能。
根据本研究的结果，我们在 ACL 重建中不进行半腱肌腱移植物的管状化，因为其结构和机械性能减弱。
