Fig. 2

DCSS suture fabrication, morphology at the cross-sections, and morphology at breakage interface and tensile strength. A Fabrication of DCSS suture on decellularization, inner layer separation, drug loading and rolling. B The frozen section (b1) and SEM images (b2) of DCSS suture. Longitude (C) and cross-section (D) of two types of sutures under SEM (c1: longitude of DCSS suture after cutting off using scissor, c2: longitude of catgut suture after cutting, d1: breakage interface of DCSS suture after freezing, d2: breakage interface of catgut suture after freezing). E, F DCSS and catgut sutures’ tensile strength, fracture energy and Young’s modulus in the dry and wet state (n = 3). After stretching, the fracture interface of DCSS (G) and catgut suture (H)