Abstract: Disclosed are a cervical vertebra fixation device using a plurality of screws characterized by comprising: a body having a length extending across at least two bones and including a first end and a second end opposite to the first end; and three or more openings formed in the body for receiving the plurality of screws, wherein the first end has a profile with at least a portion of the body being removed with respect to the horizontal line perpendicular to the length direction to prevent adjacent segment degeneration, and a cervical vertebra fixation device using at least one screw, comprising: a body fixed into a bone; at least one opening formed in the body for receiving the at least one screw; a cover for preventing any escape of the screws inserted; and a cover screw, wherein the cover is movable with respect to the body to allow the insertion of screws while the cover is coupled to the body.

Abstract: Disclosed are a cervical vertebra fixation device using a plurality of screws characterized by comprising: a body having a length extending across at least two bones and including a first end and a second end opposite to the first end; and three or more openings formed in the body for receiving the plurality of screws, wherein the first end has a profile with at least a portion of the body being removed with respect to the horizontal line perpendicular to the length direction to prevent adjacent segment degeneration, and a cervical vertebra fixation device using at least one screw, comprising: a body fixed into a bone; at least one opening formed in the body for receiving the at least one screw; a cover for preventing any escape of the screws inserted; and a cover screw, wherein the cover is movable with respect to the body to allow the insertion of screws while the cover is coupled to the body.

Abstract: A spacer for laminoplasty is provided, the spacer including: a first spacer fixed to an upper lamina plate in a state in which an incision surface of the upper laminate plate of a lamina plate of an incised cervical vertebrae is seated on and supported by the first spacer; and a second spacer fixed to a lower lamina plate so that an incision surface of the lower lamina plate of the lamina plate of the incised cervical vertebrae is in contact with and supported by the second spacer, wherein the first spacer and the second spacer are in a coupled state in which they are not separated from each other by a fixed bar, while having expandable lengths with respect to each other.