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Augmentation and reconstruction of jawbone defects is challenging for oral surgeons.After the treatment of patients with oral cancer, most of them missed some teeth and jawbone.However, sometimes it is difficult to reconstruct the occlusal condition, especially in case of large defects that require an equally large graft for reconstruction.The purpose of this study was to examine the feasibility of tailor-made jawbone reconstruction by using a titanium device.Bone augmentation was performed for small and large defects of the jawbone.Computed tomography (CT) images and the FreeForm (Sensable) and BioNa (Bionic) softwares were used to obtain three-dimensional (3D) designs of the device.First, the CT-3D image was constructed.Then, the important anatomical structure was superimposed on the image.Using computer-aided-design (CAD), a process of drafting and designing models using a computer software,virtual designs of the implant device were obtained.The 3D model of the device was generated using rapid prototyping (RP).RP processes CAD data;transforms them into sliced, horizontal cross-sections;and constructs the 3D model layer by layer by using selective laser melting method.In this study, the CAD/RP technique for reconstructing small and large defects of the jawbone, and some associated clinical cases are described.All patients had a good clinical course, with no serious complications.Titanium powder, and autologous and artificial bone grafts were used for RP and augmentation, respectively.The operation was safe, and because the implant device was prepared beforehand, it took less time.Therefore, a tailor-made implant device may be a good clinical choice for augmentation and reconstruction of the jawbone.