WO2015135374A1

WO2015135374A1 - Dilated interbody fusion cage

Info

Publication number: WO2015135374A1
Application number: PCT/CN2015/000046
Authority: WO
Inventors: 申维波; 路雪城
Original assignee: 山东冠龙医疗用品有限公司
Priority date: 2014-03-13
Filing date: 2015-01-27
Publication date: 2015-09-17
Also published as: JP6333418B2; JP2017508580A; KR20160124158A; CN103948424B; CN103948424A; KR101766391B1

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

Expanded vertebral body cage

Technical field

The invention relates to a medical surgical instrument, in particular to an expanded vertebral body cage for thoracolumbar surgery.

Background technique

Vertebral body fusion cage is widely used in spinal surgery, mainly for the reconstruction of intervertebral space of discectomy hand. In the prior art, the technical solution closest to this application is authorized by the Patent Office of the State Intellectual Property Office. The application number is 201120350285.3, the name: the utility model patent of the expanded vertebral body fusion device. In the technical solution of the patent, the bone grafting window is lacking, and it is difficult to inject the bone particles into the bone graft during the operation, so the post-operative fusion cage and the vertebral body Difficulty in fusion, easy to become a foreign body in the body, there is a certain risk of surgery, which is a deficiency of the existing technology.

Summary of the invention

The technical problem to be solved by the present invention is to provide a method for expanding the vertebral body fusion device according to the deficiencies of the prior art, which adopts a fusion body composed of a base portion, an inverted tooth portion and a head portion. The base of the fusion body has a push rod along the axis of the fusion body and is connected with the fusion body through a thread. The inverted tooth portion of the fusion body is provided with a 倒-shaped inverted tooth frame, and the top surface of the inverted tooth frame and the push rod of the push rod Head connection. In this structure, the fusion device is placed in the cone between the surgery, and when the push rod is screwed in, the inverted tooth frame is pushed downward, and the two side walls of the inverted gear frame are opened to both sides of the fusion body. The height between the cones is adjusted, and the bone graft is formed by the push rod shaft hole, the card head channel and the inverted tooth frame hole to ensure that the fusion device can be fused with the vertebral body after the operation.

The present invention is achieved by the following technical measures: the expanded vertebral body fusion device of the present invention comprises a fusion body and a push rod axially screwed to the fusion body in the fusion body, and the present invention is characterized by the fusion body. The vertical projection is a chamfered rectangle, the upper portion of the fusion body is a base portion, the lower portion is a head portion, and an integral structure of an inverted tooth portion between the base portion and the head portion; and a threaded hole along the axis in the base portion The push rod is located in the threaded hole and is connected by a matching threaded portion. The inverted tooth portion is composed of left and right inverted tooth side walls connected to the base portion, and the two inverted tooth portions are hollow between the side walls. a 倒-shaped inverted tooth frame is connected to the inverted tooth portion, and two sides of the side wall of the two inverted tooth portions are connected with a reverse tooth frame sliding groove at both sides, and the bottom portions of the two inverted tooth portions are There are sidewall trapezoidal grooves on both sides of the head joint of the fusion body, and the bottom surface of the head of the fusion body is curved. On the top surface of the inverted tooth frame, there is a chuck hole coaxial with the fusion body, and the tooth is inverted. There are inverted teeth on the outer sides of the two side walls of the frame, and corresponding inverted gear holes on the two side walls of the inverted gear frame, the inverted gear frame The bottom end of the side wall has a reverse tooth frame head matched with the side wall trapezoidal groove on the side wall of the reverse tooth portion; the lower part of the push rod has a push rod chuck, and the chuck hole of the inverted tooth frame is set in the bottom On the pusher chuck, there is a chuck through slot at the axis of the pusher chuck, and a push rod shaft hole is connected to the chuck through slot at the top end of the push rod along the axis of the push rod. A specific feature of the solution is that there is a base through groove on the top surface of the base of the fusion body. There is an inner hexagonal hole along the axis of the top surface of the push rod, and the axis of the inner hexagonal hole coincides with the axis of the push rod shaft hole. The inverted tooth frame hole on the inverted tooth frame is rectangular. The material used for the fusion is a medical titanium alloy or a medical non-metal material. The material used for the push rod is a medical titanium alloy or a medical non-metal material. The material used for the inverted frame is a medical titanium alloy or a medical non-metal material.

The beneficial effects of the present solution can be known from the description of the above scheme, since in this scheme, the vertical projection of the fusion body is a chamfered rectangle, the upper portion of the fusion body is a base portion, and the lower portion is a head portion at the base portion and The head is an integral structure of the inverted tooth portion. a threaded hole is formed in the base portion along the axis, the push rod is in the threaded hole and is connected by a mating screw, and the inverted tooth portion is a left and right inverted tooth side wall connected to the base portion The utility model is configured to be hollow between the sidewalls of the two indented portions, and the inverted tooth frame is connected to the inverted tooth portion, and the inverted tooth frame is arranged on both sides of the top of the side wall of the two inverted tooth portions and the base portion The sliding groove has a side wall trapezoidal groove on both sides of the bottom portion of the bottom surface of the two inverted tooth portions and the head of the fusion body, and the bottom surface of the head of the fusion body is curved. The top surface of the inverted tooth frame has a chuck hole coaxial with the fusion body, and has opposite teeth on the outer side of the two side walls of the inverted tooth frame, and corresponding inverted gear frame holes on the two side walls of the inverted tooth frame, the inverted tooth The bottom ends of the two side walls of the frame have inverted tooth frames that cooperate with the trapezoidal grooves on the side walls of the inverted tooth portions. The lower part of the push rod has a pusher chuck, and the chuck hole of the inverted gear frame is sleeved on the push rod chuck, and a chucking slot is formed at an axis of the push rod chuck, The top end of the push rod has a push rod shaft hole along the axis of the push rod and is connected with the card slot. In this structure, since the fusion body has a rectangular head shape and is curved on the side walls of the two inverted tooth frames of the inverted tooth frame, it is easy to insert the fusion body into the cone of the patient's vertebral body, and the inverted tooth frame The inverted teeth on the side walls ensure that the fusion body does not easily exit. Rotating the push rod through the inner hexagonal hole, the push rod pushes the inverted tooth frame downward, so that the side walls of the two inverted tooth frames of the inverted tooth frame are opened, and the height between the cones of the patient's vertebral body can be controlled to reach the height between the cone and the vertebral body. In addition to the requirements of the physiological curvature, in addition, the pusher shaft hole, the chuck groove and the inverted gear hole can be used to form the bone graft channel and the window to input the bone particles between the cones, and the fusion body and the vertebral body are fixedly fused. The patient's vertebral body can be restored to normal function. It can be seen that the present invention has outstanding substantive features and significant advances as compared with the prior art, and the beneficial effects of the implementation thereof are also obvious.

DRAWINGS

1 is a schematic cross-sectional view of a specific embodiment of the present invention.

2 is a cross-sectional view showing the structure of the left side of FIG. 1.

3 is a schematic plan view of the top view of FIG. 2.

4 is a schematic cross-sectional view of the A-A of FIG. 2.

In the figure, 1 is the head, 2 is the inverted gear frame, 3 is the inverted tooth portion, 4 is the base portion, 5 is the fusion body, 6 is the base through groove, 7 is the push rod, 8 is the push rod chuck, 9 is the inverted Tooth, 10 is the inverted gear frame hole, 11 is the inverted tooth frame head, 12 is the chuck head slot, 13 is the push rod shaft hole, 14 is the inner hexagonal hole, 15 is the inverted tooth frame top surface, 16 is the inverted tooth frame Chute, 17 is the side of the inverted tooth, 18 It is a trapezoidal groove on the side wall, and 19 is a chuck hole.

detailed description

In order to clearly illustrate the technical features of the present solution, the present embodiment will be described below through a specific embodiment and in conjunction with the accompanying drawings.

As can be seen from the drawing, the expanded vertebral body cage of the present embodiment has a fusion body 5 and a push rod 7 axially screwed into the fusion body 5 in the fusion body 5, and the vertical projection of the fusion body 5 described in the present embodiment In the case of a chamfered rectangle, the upper portion of the fusion body 5 is the base portion 4, the lower portion is the head portion 1, and the inverted portion 3 is an integral structure between the base portion 4 and the head portion 1. A threaded hole is formed in the base portion 4 along the axis, and the push rod 7 is in the threaded hole and is connected by a matching screw thread, and a base through groove 6 is formed on the top surface of the base portion 4 of the fusion body 5. The base channel 6 functions to connect the surgical instrument of the cage to the cage of the cage during the operation of inserting the cage. The inverted tooth portion 3 is composed of two left and right inverted tooth side walls 17 connected to the base portion 4, and the two inverted tooth portion side walls 17 are hollow, and the inverted tooth portion 3 is connected with a meandering inverted tooth. In the frame 2, on both sides of the connection between the top of the two inverted tooth side walls 17 and the base portion 4, there is an inverted frame chute 16, and the bottom of the two inverted toothed side walls 17 is connected with the head 1 of the fusion body 5 There are sidewall trapezoidal grooves 18 on both sides, and the bottom surface of the head 1 of the fusion body 5 is curved. The top surface 15 of the inverted tooth frame has a chuck hole 19 coaxial with the fusion body 5, and the reverse tooth 9 is arranged outside the two side walls of the inverted gear frame 2, and the opposite sides of the inverted tooth frame 2 have corresponding inverted edges. The frame hole 10 has a rectangular shape, and the bottom ends of the two side walls of the inverted frame 2 have an inverted frame head 11 that cooperates with the side wall trapezoidal groove 18 on the side wall 17 of the inverted tooth portion. The push rod 7 has a pusher chuck 8 at the lower portion thereof, and the chuck hole 19 of the inverted gear frame 2 is fitted on the pusher chuck 8 with a chuck at the axis of the pusher chuck 8 The through slot 12 also functions to increase the elasticity of the pusher clip 8 . At the top end of the push rod 7 , a push rod shaft hole 13 is connected to the chuck through slot 12 along the axis of the push rod 7 . There is an inner hexagonal hole 14 along the axis of the top surface of the push rod 7, the axis of the inner hexagonal hole 14 coincides with the axis of the push rod shaft hole 13, and the inner hexagonal hole 14 is for rotating the push rod with a hexagonal wrench during surgery. 7 Pushing the inverted gear frame 2 downward moves the two side walls of the inverted gear frame 2 apart. The material used for the fusion body 5, the push rod 7 and the inverted tooth frame 2 may be one of a medical titanium alloy or a medical non-metal material, and the same material may be used, or different materials may be used. The fusion body 5 and the push rod 7 are made of the same material, both of which are made of medical titanium alloy, and the inverted tooth frame 2 is a medical non-metal material.

The invention is not limited to the specific embodiments described above, and variations, modifications, additions or substitutions made by those skilled in the art within the scope of the invention are also intended to fall within the scope of the invention.

Claims

An expanded vertebral body fusion cage comprising a fusion body and a push rod axially threadedly coupled to the fusion body in the fusion body, wherein the vertical projection of the fusion body is a chamfered rectangle, the fusion The upper part of the body is a base, the lower part is a head, and an integral structure of the inverted tooth portion between the base and the head; a threaded hole is formed along the axis in the base, and the push rod is in the threaded hole and The inverted tooth portion is composed of the left and right side surfaces of the two toothed portions connected to the base portion, and the side walls of the two inverted tooth portions are hollow, and the inverted tooth portion is connected with a dome shape. The inverted gear frame has an inverted frame chute on both sides of the top of the sidewall of the two inverted tooth portions and the base portion, and the side walls of the bottom portion of the two inverted tooth portions and the head of the fusion body have side walls at both sides a trapezoidal groove, the bottom surface of the head of the fusion body is curved, and a top surface of the inverted tooth frame has a chuck hole coaxial with the fusion body, and the outer side of the two side walls of the inverted tooth frame has inverted teeth, and the inverted tooth The two side walls of the frame have corresponding inverted tooth frame holes, and the bottom ends of the two side walls of the inverted tooth frame have a trapezoidal groove on the side wall of the inverted tooth portion. a lower toothed frame head; the lower part of the push rod has a pusher chuck, the chuck hole of the inverted gear frame is fitted on the pusher chuck, and the chuck is at the axis of the pusher chuck The through slot has a push rod shaft hole connected to the chuck slot at the top end of the push rod along the axis of the push rod.
The vertebral body fusion cage of claim 1 wherein there is a base channel in the top surface of the base of the fusion body.
The vertebral body cage according to claim 1, wherein the top surface of the push rod has an inner hexagonal hole along the axis, and the axis of the inner hexagonal hole coincides with the axis of the push rod shaft hole.
The vertebral body cage according to claim 1, wherein the inverted frame hole on the inverted frame is rectangular.
The vertebral body cage according to claim 1 or 2, wherein the fusion body is made of a medical titanium alloy or a medical non-metal material.
The vertebral body cage according to claim 1 or 3, wherein the pusher is made of a medical titanium alloy or a medical non-metal material.
The vertebral body cage according to claim 1 or 4, wherein the material of the inverted frame is a medical titanium alloy or a medical non-metal material.