title: Bone Regenerative Medicine in Oral and Maxillofacial Region Using a Three-Dimensional Printer<sup/>.
abstract: Bone grafts currently used for the treatment of large bone defect or asymmetry in oral and maxillofacial region include autologous, allogeneic, and artificial bones. Although artificial bone is free from the concerns of donor site morbidity, limitation of volume, disease transmission, and ethical issues, it lacks osteogenic and osteoinductive activities. In addition, molding of the artificial bone is an issue especially when it is used for the augmentation of bone as onlay grafts. To solve this problem, additive manufacturing techniques have been applied to fabricate bones which have outer shapes conformed to patients' bones. We developed a custom-made artificial bone called a computed tomography (CT)-bone. Efficacy of CT-bone was proven in a clinical research and clinical trial, showing good manipulability, stability, and patient satisfaction. However, low replacement rate of artificial bones by endogenous bones remain an unsolved issue. Loading of cells and growth factors will improve the bone replacement by inducing osteogenic and osteoinductive activities. In addition, the three-dimensional bioprinting technique will facilitate bone regeneration by placing cells and biological substances into appropriate sites.
authors.affiliation: 1 Department of Cartilage and Bone Regeneration (Fujisoft), Graduate School of Medicine, The University of Tokyo , Bunkyo-ku, Japan .
authors.forename: Atsuhiko
authors.initials: A
authors.lastname: Hikita
authors.affiliation: 2 Department of Bioengineering, Graduate School of Engineering, The University of Tokyo , Bunkyo-ku, Japan .
authors.forename: Ung-Il
authors.initials: UI
authors.lastname: Chung
authors.affiliation: 3 Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, The University of Tokyo , Bunkyo-ku, Japan .
authors.forename: Kazuto
authors.initials: K
authors.lastname: Hoshi
authors.affiliation: 3 Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, The University of Tokyo , Bunkyo-ku, Japan .
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Takato
mesh_terms: D000818:Animals; D001861:Bone Regeneration; D018786:Bone Substitutes / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D006801:Humans; D008446:Maxillofacial Injuries / Q000000981:diagnostic imaging / Q000378:metabolism / Q000473:pathology / Q000601:surgery*; D066330:Printing, Three-Dimensional; D044968:Regenerative Medicine / Q000295:instrumentation / Q000379:methods*
chemical_list: D018786:Bone Substitutes
keywords: 3-D printing; bone; ceramic scaffolds; computer-aided tissue design