Stand-Alone Anterior Cervical Discectomy and Fusion Using an Additive Manufactured Individualized Bioactive Porous Titanium Implant without Bone Graft: Results of a Prospective Cli... oleh Shunsuke Fujibayashi, Mitsuru Takemoto, Takashi Nakamura, Tomiharu Matsushita, Tadashi Kokubo, Kiyoyuki Sasaki, Shigeo Mori, Shuichi Matsuda