School of Medicine, Deakin University, Geelong, Australia.
J Orthop Res. 2013 Jan;31(1):132-8. doi: 10.1002/jor.22185. Epub 2012 Jul 9.
In orthopedic surgery, the reattachment of tendon to bone requires suture materials that have stable and durable properties to allow time for healing at the tendon-bone interface. The suture, not rigidly restrained within the anchor eyelet, is free to move during surgery and potentially after surgery with limb motion. During such movement, the suture is subjected to bending and frictional forces that can lead to fatigue-induced failure. We investigated some common contemporary commercial number-two-grade suture materials and evaluated their resistance to bending abrasion fatigue and the consequent failure. Sutures were oscillated over a stainless steel wire at low frequency under load. Number of abrasion cycles to failure, changes in suture morphology, and fatigue-failure method was recorded for each material. Suture structure had a significant effect on abrasion resistance, with braided sutures containing large numbers of fine high tenacity core filaments performing 15-20 times better than other braided suture structures. Ultra high molecular weight polyethylene (UHMWPE) core filaments resisted bending abrasion failure better than other core materials due to the load spreading and abrasion resistance of these filaments. Sutures with UHMWPE cores also had high resistance to tensile failure. Limited correlation was observed between tensile strength and abrasion resistance.
在骨科手术中，肌腱与骨的重新连接需要具有稳定和耐用特性的缝合材料，以便为肌腱与骨界面的愈合留出时间。在手术过程中，缝线不会被锚钉眼孔严格限制，可以自由移动，并且在术后随着肢体运动也可能移动。在这种运动过程中，缝线会受到弯曲和摩擦力的作用，从而导致疲劳引起的失效。我们研究了一些常见的当代商业 2 号线缝合材料，并评估了它们对弯曲磨损疲劳的抵抗力以及随之而来的失效情况。缝线在负载下以低频在不锈钢丝上振荡。记录了每种材料的失效磨损循环次数、缝线形态变化和疲劳失效方式。缝线结构对耐磨性有显著影响，含有大量细高强芯丝的编织缝线的性能比其他编织缝线结构好 15-20 倍。由于这些纤维的载荷分布和耐磨性，超高相对分子质量聚乙烯（UHMWPE）芯丝比其他芯丝材料更能抵抗弯曲磨损失效。具有 UHMWPE 芯丝的缝线也具有很高的抗拉伸失效能力。拉伸强度与耐磨性之间观察到的相关性有限。
