Abstract: An intervertebral disc according to this invention comprises an upper lid, a lower lid, and a joint piece, and the upper lid is formed with a first sphere and a first shaft and the lower lid is formed with a first camber and a second shaft, in which the top of joint piece is formed with a second sphere and a first guidance groove and the bottom of joint piece is formed with a second camber and a second guidance groove; the joint piece is provided between the upper lid and the lower lid, makes the second sphere and the second camber glide and roll respectively on the first sphere and the first camber to contact with each other, and makes the first shaft and the second shaft respectively fit to the first guidance groove and the second guidance groove, thereby the intervertebral disc adjustable being formed.

Abstract: An auxiliary apparatus for a vertebra surgical operation is applied to a small incision surgical operation. The auxiliary apparatus includes an auxiliary part having a regulating opening, a guiding block attached on the rear side of the auxiliary part, a plurality of sleeves regulated by the regulating opening, and a puncturing part passing through the guiding block and the lower side of the sleeves. The sleeves are placed in expanding parts and the expanding parts are placed into the muscle. There are through holes located at the jointing locations of the bone screws and the sleeves. One end of the puncturing part is connected with a linking rod. The puncturing part passes through the guiding block. One end of the linking rod punctures into muscle and passes through the expanding parts and the through holes to receive the linking rod in the plow grooves of the bone screws.

Abstract: A human bone substitutional implant comprises a main body and a push body. The main body is a hollow cylinder with a thread portion or a ratchet portion disposed on its outer wall. The thread portion or the ratchet portion has at least a slit dividing it into four equal parts. An inner thread is disposed on the inner wall of the thread portion or the ratchet portion. An outer thread is disposed on the outer surface of the push body and corresponds to the inner thread. The push body and the main body are joined together via screw connection of the outer thread and the inner thread. Because the main body has a conical passage therein, the main body will be held open a certain angle to support and enhance a fractured bone of the human body when the push body is axially pushed into the main body.

Abstract: A vertebral fixing device for a patient having a diseased vertebral column segment for fastening a first vertebral column segment and a second vertebral column segment at both ends of the diseased vertebral column segment includes a first fixing piece having a first fixing medium integrally formed thereto and secured to the first vertebral column segment, and a second fixing piece having a second fixing medium integrally formed thereto and secured to the second vertebral column segment. The vertebral fixing device further includes a fixing unit having a first and a second hole respectively penetrating therethrough the two fixing mediums for fixing together the two fixing mediums.

Abstract: A coupling plate assembly for spinal correction includes a central rod, a clamping tube having a truncated conical head sized to receive the central rod, an integrally formed step, and a threaded inner periphery defining a hole on the step for a screw to extend therethrough and clamp the central rod, and a plate having two slots each extending from a distal end toward a center portion of the plate and a channel perpendicular to an interconnection axis of the slots with a groove for receiving the clamping tube.

Abstract: A spinal transpedicle drill jig adapted for providing a safe route for drilling, including an I-shaped body, a guiding base and a positioning base. The jig provides a precise location for drilling to prevent deviation of the drilling direction so as to prevent injury during surgery to the nerve root or spinal cord.