The UFO cervical dynamic intervertebral spacer is positioned somewhere in between the traditional fusion cage and artificial disc. It can effectively restore the disc height and provide the cervical vertebrae appropriate mobility. With the properties of the materials applied, the stability of the fusion cage and the motion preservation of the artificial disc can be well integrated. The elasticity of the UFO can evenly share the loading when the cervical vertebrae moves and the porous surface treatment of the titanium alloy dome can further increase the stability after it’s implanted.