Fernando P. S. Guastaldi is an Assistant Professor of Oral and Maxillofacial Surgery at Harvard School of Dental Medicine (HSDM) and Director of the Skeletal Biology Research Center (SBRC), Department of Oral and Maxillofacial Surgery (OMFS), Massachusetts General Hospital (MGH). He completed his DDS (2006) at the Dental School of Ribeirão Preto (Brazil). He is Specialist in OMFS (2010), and he completed is MSc (2010) and PhD (2013) in OMFS at the Dental School of Araçatuba (UNESP/Brazil). He was a Visiting Scholar (2012) at the Department of Biomaterials and Biomimetics at New York University College of Dentistry (NYUCD). He completed two Postdoctoral Research Fellowships, the first at the Dental School of Araraquara (UNESP/Brazil) (2014–2017) and the second at MGH/HSDM (2017–2019) focused on bone regeneration of swine mandible critical-sized defects by leveraging principles of tissue engineering and 3D printing. Dr. Guastaldi has research publications and book chapters inthe field of bone regeneration, maxillofacial reconstruction, and temporomandibular joint (TMJ) regeneration. Bhushan P. Mahadik is the Director of Tissue Engineering at Prellis Biologics. He completed his BS (2008) at the University of California, Berkeley, in chemical engineering and his MS (2010) and PhD 2014) at the University of Illinois at Urbana Champaign (UIUC) in chemical and biomolecular engineering. His PhD and postdoctoral research at UIUC focused on engineering the hematopoietic stem cell niche within the bone marrow by leveraging principles of biomaterial design and microfluidic platforms. He joined the University of Maryland in 2017 as the Assistant Director for the NIH/NIBIB Center for Engineering Complex Tissues (CECT), where he helped lead the research, collaborative, administrative, and strategic growth of CECT as a leading resource for the 3D printing and fabrication of engineered tissues. Dr. Mahadik has several research publications in the field of tissue engineering and regenerative medicine.