Many complicated medical problems are now solved by the latest additive manufacturing (AM) technology, often known as 3D printing. 3D printing is employed in the realm of healthcare for everything from rapid prototyping to full-scale production. Printing of bone models, organs, and other body components ahead of surgeries using 3D printing would allow doctors to see operations ahead of time and propose alternatives for bone implants. Many encouraging outcomes were seen in implants, regenerative medicine, diagnosis, organs, and artificial tissues. This article covers the principles and understanding of 3D printing for the bioprinting process. In the approaching years, AM will become a critical component in patient-specific medical technology.