The main objective for the development of CAGE-LOC Cage was to design a versatile system for the treatment of vertebral fractures at a wide range of spinal levels. A key feature is the ability to extend to the des ired height intra-operatively. The extension mechanism of CAGE-LOC Cage is extremely simple and intuitive, thereby exerting distraction forces onto the anterior column of the spine. Repeated adjustment of height is straightforward and therefore allows for accurate restoration of the spinal curvature. The extension mechanism is securely locked by screws.