LAUSR

Abstract The most current 3D printing method involves the combination of additional processes, such as casting and demolding, to produce an organ model. This method requires professionals to invest a considerable amount of time in editing the model and post-processing activities. In this work, embedded three-dimensional printing (EMB3D) is performed in a transparent and photocrosslinkable support medium. Based on a photo-curable hydrogel precursor with yield stress behavior, a new EMB3D printing strategy is developed, which could be considered as an inverse process. During printing, a closed shell is formed with a release ink using a capillary needle. After printing, the support medium is photocrosslinked to a solid part, and the object is peeled off along with the closed shell. The stated approach makes it possible to produce transparent and elastic solid objects with multi-internal surfaces. Moreover, it can be applied in providing a soft, dissectible, accurate, and highly interactive model for medical doctors to facilitate surgical processes.