Abstract: A screw assembly for a spinal implant comprises a first unit including insertion holes and an inner space, a rod having a side whose outer circumference surface is positioned on the insertion holes of the first unit and another side whose outer circumference surface is positioned on insertion holes of another first unit positioned adjacent to the first unit, a second unit having an upper portion rotatably received in a lower portion of the inner space and a lower portion screwed to a vertebral body, a third unit screwed to an upper portion of the inner space to hold the rod, and a fourth unit positioned between the inner space and the upper portion of the second unit and including a pressure cap seated in the inner space.

Abstract: The present invention relates to a screw assembly for a spinal implant comprising a first unit including insertion holes positioned opposite each other, cut from an edge of an upper end of the first unit, and forming an inner space, the first unit penetrated from top to bottom, a rod having a side whose outer circumference surface is positioned on the insertion holes of the first unit and another side whose outer circumference surface is positioned on an insertion holes of another first unit positioned adjacent to the first unit, a second unit having an upper portion rotatably received in a lower portion of the inner space and a lower portion screwed to a vertebral body of a spine not to be released; a third unit screwed to an upper portion of the inner space to hold the rod, and a fourth unit positioned between the inner space and the upper portion of the second unit to restrict a rotation of the second unit and including a pressure cap seated in the inner space while pressing an outer surface of an upper po

Abstract: The present invention relates to a cage assembly for spinal interbody fusion comprising: a main body which is inserted between a vertebral body of a spine from which a disc is removed, and a neighboring vertebral body; a first screw part which is formed on the upper surface of the main body, and which has a spiral shape formed along a first direction heading outward from the center; a second screw part which is formed on the lower surface of the main body, and which has a spiral shape formed along a second direction heading outward from the center; and a space part which is formed to penetrate the upper surface and the lower surface of the main body, and which enables the bones forming the vertebral body and the neighboring vertebral body to fuse together. The purpose of the present invention is to promote the smooth progress of surgery for the bone fusion of two neighboring vertebral bodies, or more than two vertebral bodies, forming the spine.