Smith G H, Huntley J S, Anakwe R E, Wallace R J, McEachan J E
Royal Infirmary, Little France, Edinburgh, UK.
J Hand Surg Eur Vol. 2012 Nov;37(9):823-5. doi: 10.1177/1753193411427663. Epub 2011 Nov 24.
A longitudinal stretch or 'pre-tensioning' is a method employed by some surgeons to improve the handling characteristics of a suture. We used a tensile tester to assess the effect of pre-tensioning on the mechanical properties of two suture materials (3-0 Prolene and 3-0 Ethibond) commonly used for flexor tendon repair. A cyclical loading programme was used to simulate an early rehabilitation regime. All sutures were subsequently tested to failure (for ultimate tensile strength). The pre-tensioned Prolene sutures showed significantly less creep after cyclical loading in comparison to controls. Conversely pre-tensioning had no measurable effect on the deformation of Ethibond by creep. There was no effect on ultimate tensile strength for either material. The propensity of Prolene to creep (and thereby form a 'gap' in tendon repairs) can be reduced by pre-tensioning.
纵向拉伸或“预张紧”是一些外科医生采用的一种方法，用于改善缝线的操作特性。我们使用拉伸试验机来评估预张紧对两种常用于屈肌腱修复的缝线材料（3-0普理灵和3-0爱惜邦）力学性能的影响。采用循环加载程序来模拟早期康复方案。随后对所有缝线进行直至断裂的测试（以测定极限拉伸强度）。与对照组相比，预张紧的普理灵缝线在循环加载后表现出明显更少的蠕变。相反，预张紧对爱惜邦因蠕变引起的变形没有可测量的影响。两种材料的极限拉伸强度均未受影响。预张紧可降低普理灵发生蠕变的倾向（从而在肌腱修复中形成“间隙”）。
