Editor’s summaryThree-dimensional (3D) printing is a valuable tool for generating patient-specific implants, either externally or even directly inside the body. The limitation of the former approach is the need for surgical implantation, whereas the latter approach is limited by the need for precursor materials and a polymerization method safe for in vivo use that can be activated with precision from outside of the body. Davoodi et al. developed a platform that uses imaging-guided ultrasound pri...