The shape transformation characteristics of four-dimensional (4D)-printed bone structures can meet the individual bone regeneration needs. while their structure can be programmed to cross-link or reassemble by stimulating responsive materials. At the same time. it can be used to design vascularized bone structures that help establish a bionic microenvironment. https://www.ealisboa.com/top-save-RE-DESIGNED-Strikketoy-oppbevaring-Prosjekt-27-Sort-100-Skinn-great-save/