Abstract: The present disclosure provides an adjustable double-slot internal spinal fixation apparatus, including a first base, a second base and a connecting rod. The first base and the second base each contains a U-shaped slot from top to bottom. An inner wall of each U-shaped slot contains inner threads. The connecting rod is disposed along a horizontal direction. The second base contains a long slot along the horizontal direction. One end of the connecting rod is inserted in the first base, and the other end of the connecting rod is inserted in the long slot of the second base. The connecting rod can swing in the long slot. The first base and the second base are capable of relatively rotating on the connecting rod.

Abstract: The present disclosure provides an adjustable double-slot internal spinal fixation apparatus, including a first base, a second base and a connecting rod. The first base and the second base each contains a U-shaped slot from top to bottom. An inner wall of each U-shaped slot contains inner threads. The connecting rod is disposed along a horizontal direction. The second base contains a long slot along the horizontal direction. One end of the connecting rod is inserted in the first base, and the other end of the connecting rod is inserted in the long slot of the second base. The connecting rod can swing in the long slot. The first base and the second base are capable of relatively rotating on the connecting rod.

Abstract: Disclosed are a fusion cage for a spinal surgery and a clamping device thereof. The fusion cage comprises a fusion cage body (1) and a triangular screw plate (2). A limiting groove (12) fit with the clamping device is provided at a rear end surface of the fusion cage body (1), the fusion cage body (1) is hinged with the screw plate (2), and each of three corners of the screw plate (2) is provided with a screw hole (23). The clamping device comprises two clamping rods (4) which are fit with each other, and a front end of each clamping rod (4) is provided with a clamping head (41), wherein each of face-to-face sides of the clamping heads (41) is provided with a limiting protrusion (42), a front end of each clamping head (41) is capable of being inserted into the limiting groove (12) of the fusion cage body (1), and the limiting protrusion (42) is capable of being clamped at a front side surface of the screw plate (2).

Abstract: A transverse shift screw tail, a transverse adjustable spinal screw, and an implantation method. The screw comprises a screw tail and a screw seat, the screw seat has a rod groove used for placing a connecting rod, which is recessed downwards from the top of the screw seat and radially penetrates the screw seat, a bottom of the rod groove is a curved surface adapted to an outer circumferential surface of the connecting rod, and the rod groove is provided with a locking thread fit with a locking bolt. The screw tail comprises a fixing column capable of being screwed into a vertebral body and a platform located at an end portion of the fixing column, the platform is provided with the installation head used for connecting with the screw seat, and an eccentric distance is provided between a center of the installation head and an axis of the fixing column.

Abstract: Disclosed are a fusion cage for a spinal surgery and a clamping device thereof. The fusion cage comprises a fusion cage body (1) and a triangular screw plate (2). A limiting groove (12) fit with the clamping device is provided at a rear end surface of the fusion cage body (1), the fusion cage body (1) is hinged with the screw plate (2), and each of three corners of the screw plate (2) is provided with a screw hole (23). The clamping device comprises two clamping rods (4) which are fit with each other, and a front end of each clamping rod (4) is provided with a clamping head (41), wherein each of face-to-face sides of the clamping heads (41) is provided with a limiting protrusion (42), a front end of each clamping head (41) is capable of being inserted into the limiting groove (12) of the fusion cage body (1), and the limiting protrusion (42) is capable of being clamped at a front side surface of the screw plate (2).

Abstract: Disclosed is an extension piece at a screw end of a pedicle screw, where two extension pieces are oppositely disposed at the pedicle screw tail, and the extension pieces are flexible extension pieces. The extension pieces are flexibly designed, having elastically bendable characteristics, the extension pieces in the subcutaneous part can be elastically bent by external force, its dilation trend may not extend to the epithelial part, and it is feasible that muscles are squeezed only subcutaneously, so as to keep small incisions, and in the case of a threading operation of a reset rod, as portions of the two extension pieces in the subcutaneous part are dilated and separated after bending, a sufficient threading space can be provided, so that the threading operation is easy to perform, thereby reducing risks of surgeries. Further disclosed are a dilator and a push rod reset lever cooperating with the extension piece.