Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA.
Joint Department of Biomedical Engineering, North Carolina State University and the University of North Carolina, Raleigh, North Carolina, USA.
Vet Surg. 2021 Jul;50(5):1128-1136. doi: 10.1111/vsu.13653. Epub 2021 May 7.
To determine the effect of a novel barbed suture pattern (NBSP) compared to a three-loop-pulley (3LP) with and without epitendinous suture (ES) augmentation on the biomechanical strength and gap formation of repaired canine tendons.
Ex vivo, cadaveric, randomized, experimental study.
Forty, adult superficial digital flexor tendons (SDFT).
SDFT were randomly assigned to one of four groups (n = 10/group). Sharp tenotomy was performed and repaired with 3LP, NBSP, 3LP + ES, and NBSP + ES. Constructs were tested to failure while evaluating yield, peak, and failure loads, loads at 1 and 3 mm gap formation, and failure mode.
Constructs augmented with ES sustained 80% greater yield (p < .001), peak (p < .001), and failure (p < .001) loads, with no difference between 3LP + ES and NBSP + ES constructs regarding peak (p = .614), and failure forces (p = .865). Loads resulting in 1 and 3 mm gap formation were greater when constructs were augmented with an ES (p ≤ .003). Failure mode differed between groups (p < .001), occurring predominantly due to suture pull-through in 3LP and NBSP groups compared to tissue failure distant to the repair site in ES augmented constructs.
Tendons repaired with the NBSP used in this study resisted similar forces as those repaired with 3LP. Augmentation with an ES improved the biomechanical properties of repaired constructs, including resistance to gap formation.
The NBSP repair tested here may be advantageous over monofilament suture repair as it uses a similar-sized barbed core suture but eliminates the requirement for knot tying.
比较新型带刺缝线（NBSP）与三圈滑线（3LP）在有无腱周缝线（ES）增强时对修复犬肌腱的生物力学强度和间隙形成的影响。
尸体外、随机、对照实验研究。
40 根成人浅背侧屈肌腱（SDFT）。
将 SDFT 随机分为 4 组（每组 10 个）。进行锐性腱切断术并用 3LP、NBSP、3LP+ES 和 NBSP+ES 修复。在评估屈服、峰值和失效载荷、1 和 3mm 间隙形成时的载荷以及失效模式的情况下，对构建体进行失效测试。
增强 ES 的构建体维持了 80%更大的屈服（p < .001）、峰值（p < .001）和失效（p < .001）载荷，3LP+ES 和 NBSP+ES 构建体的峰值（p = .614）和失效力（p = .865）没有差异。当构建体增强 ES 时，导致 1 和 3mm 间隙形成的载荷更大（p ≤ .003）。不同组之间的失效模式不同（p < .001），主要发生在 3LP 和 NBSP 组中缝线拉穿，而在增强 ES 的构建体中，在修复部位远处发生组织失效。
在本研究中使用的 NBSP 修复的肌腱承受的力与 3LP 修复的肌腱相似。ES 增强改善了修复构建体的生物力学特性，包括抵抗间隙形成的能力。
与单丝缝线修复相比，这里测试的 NBSP 修复可能具有优势，因为它使用了类似尺寸的带刺芯缝线，但不需要打结。
