Exploiting the functional groups present or introduced into the crystalline structure of MWCNTs (multiwall carbon nanotube) and/or on the polymer, it will be possible to implant on the muscle/muscular fascia surface, the composite material, to obtain gripping. Moreover, biologically active molecules, with functions antimicrobial, anti-adhesive, anti-inflammatory or analgesic, can be introduced into the crystalline structure of MWCNTs, for modulate the inflammatory response and the incorporation of the implanted material in the fibrous scar.