Mechanical performances of double layer braided polyester sutures intended for orthopedic surgery

The effect of braid composition on mechanical performances of simple and double layer braided sutures has been studied in this paper. Double-layer braided polyester sutures have been studied in terms of suture strength, smoothness, flexibility, and knot performances. The performances deduced from the straight and the knot pull out test of manufactured sutures have been given and analyzed in this study. It is observed that the excessive addition of braided core structure shows a weak influence on deformation, rigidity and UTS of the double layer suture. However, the presence of braided core leads to obtain non-compact sutures with good knot security.This is explained by the fact that the needed load for knot untying of sutures with braided core is higher than that of suture without braided core. The most important implication of these findings is that knot suture exhibits uniform behavior and becomes more stable by adding braided core.