Surgical sealants as skin wound closures. (a) Photographs of a dendritic thioester hydrogel adhered to human skin under torsion. (b-c) an injectable iCMBA adhesive for sutureless wound closure; (b) schematic of iCMBA adhesive for wound closure, (c) images from dorsum skin treated by the adhesive and suture 7 days post operation, which shows that the wounds were closed by both methods (red arrows), and (d) H&E images of wounds closed by iCMBA adhesives and suture at day 7 post treatment. Panels a, c, and d are adapted from Ref [112] with permission from Elsevier, copyright 2012; panel b is adapted from Ref [113] with permission from Wiley, copyright 2013.