Researchers have demonstrated Deep Tissue In Vivo Sound Printing, using focused ultrasound, specialized bioinks, and imaging to form biomaterial structures inside living mice and rabbits. The preclinical technique could support localized drug delivery, tissue repair, cell delivery, and wound sealing. However, it does not yet produce functional human organs or eliminate all surgery. Source

Scientists Can Now 3D Print Biomaterials Inside the Body Without Open Surgery: A New Direction for Tissue Repair