An expanded vertebral body fusion device

Abstract

Disclosed is a dilated interbody fusion cage, comprising a fusion body (5) and a pushrod (7) connected to the axial thread of the fusion body (5) inside of the fusion body (5). The vertical projection of the fusion body (5) is a rectangle with a chamfer angle. An upper part of the fusion body (5) is a base part (4), a lower part is a head part (1), and an integral structure of a pawl teeth part (3) is arranged between the base part (4) and the head part (1). The pawl teeth part (3) is composed of side walls (17) of left and right two pawl teeth parts. An II-shaped pawl teeth frame (2) is connected to the pawl teeth part (3). A pawl teeth frame chute (16) is on the top of the side walls (17) of the two pawl teeth parts. A side wall trapezoid groove (18) is at the position of the connection to the head part (1). The bottom surface of the head part (1) is curved. A clamping head hole (19) is on the upper surface (15) of the pawl teeth frame. Pawl teeth (9) and a corresponding pawl teeth frame hole (10) are outside of two side walls of the pawl teeth frame (2). A pawl teeth frame head (11) fitted with the side wall trapezoid groove (18) on the side wall of the pawl teeth part is provided at the bottom of two side walls of the pawl teeth frame (2). A pushrod clamping head (8) is provided at the bottom of the pushrod (7). A clamping head hole (19) is mounted on the pushrod clamping head (8). A clamping head communicating groove (12) is on the pushrod clamping head (8). A pushrod shaft hole (13) provided at the pushrod (7) along the axis of the pushrod (7) is connected to the clamping head communicating groove (12).

Description

technical field [0001] The invention relates to a medical operation instrument, in particular to an expansion type vertebral body fusion device used for thoracolumbar posterior operation. Background technique [0002] Vertebral body fusion devices are widely used in spinal surgery, and are mainly used for intervertebral space reconstruction in discectomy hands. In the prior art, the technical solution closest to this application is authorized by the Patent Office of the State Intellectual Property Office Application number is 201120350285.3, title: utility model patent of expansion type vertebral body fusion device, lacks bone grafting window in the technical scheme of this patent, it is difficult to inject bone particles into bone grafting during operation, so fusion device and vertebral body after operation Fusion is difficult, it is easy to become a foreign body in the body, and there is a certain risk of surgery, which is the deficiency of the existing technology. Cont...

AI Technical Summary

Problems solved by technology

[0002] Vertebral body fusion devices are widely used in spinal surgery, and are mainly used for intervertebral space reconstruction in discectomy hands. In the prior art, the technical solution closest to this application is authorized by the Patent Office of the State Intellectual Property Office Application number is 201120350285.3, title: utility model patent of expansion type vertebral body fusion device, lacks bone grafting window in the technical scheme of this patent, it is difficult to inject bone particles into bone grafting during operation, so fusion device and vertebral body after operation Fusion is difficult, it is easy to become a foreign body in the body, and there is a certain risk of surgery, which is the deficiency of the existing technology

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