CN210138163U

CN210138163U - Cervical vertebra facet joint fusion cage

Info

Publication number: CN210138163U
Application number: CN201822117443.5U
Authority: CN
Inventors: 廖琦; 万文兵; 吴卫东; 蔡风; 黄加裕
Original assignee: Wuhan Kangkuli Technology Co ltd; Second Affiliated Hospital to Nanchang University
Current assignee: Wuhan Kangkuli Technology Co ltd; Second Affiliated Hospital to Nanchang University
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2020-03-13
Anticipated expiration: 2028-12-17

Abstract

The utility model provides a cervical vertebra facet joint fusion cage, which comprises a supporting part and a strutting part connected with the supporting part; the opening part comprises a spiral propelling hole, and a spiral propelling rod matched with the spiral propelling hole is arranged in the spiral propelling hole; a plurality of spreading teeth are sequentially arranged on the outer wall of the spiral propelling hole from top to bottom, and one end of each spreading tooth is connected with the spiral propelling rod; the opening teeth are arranged along the propelling direction of the spiral propelling rod in a downward inclined mode; and two sides of the opening part are provided with bone grafting windows which are sunken inwards, and the bone grafting windows are filled with bone grafts. Cervical vertebra facet joint fuse ware, carry out the joint when carrying out the fusion of cervical vertebra facet joint and strut and plant the bone, can make joint clearance increase fuse, realize the wicresoft's of little passageway operation, place cervical vertebra facet joint slippage and reset, stability increases, has easy operation, safe risk-free, biocompatibility and osteoinduction are good, advantage such as joint fusion rate height.

Description

Cervical vertebra facet joint fusion cage

Technical Field

The utility model belongs to the technical field of medical instrument, in particular to can strut and plant bone and be used for cervical vertebra facet joint fusion cage of cervical vertebra minimal access surgery.

Background

At present, two main methods for carrying out cervical vertebra/spinal joint fusion in an operation are provided, one method is a facet joint fusion technology under direct vision, tissues are cut in a conventional operation, cartilage and partial subchondral bone between facet joints are ground, bone blocks are implanted, and then vertebral body nail and rod fixation is carried out to achieve the purpose of facet joint fusion; the other is a minimally invasive channel technology, a channel of about 2cm is established at an affected part, cartilage and partial subchondral bone between small joints are ground under the assistance of an endoscope or X-rays, after bone blocks are implanted, a joint fusion device with unchangeable volume is placed, and then vertebral body nail and rod fixation is carried out, so that the aim of clinical joint fusion is achieved. In clinic, however, joint fusion surgery under direct vision has the disadvantages of much bleeding, large damage, slow recovery and many complications; the minimally invasive tunnel zygapophysis fusion can cause the phenomena of slippage of a fusion device of a patient, unstable spine and low fusion rate.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a cervical vertebra facet joint fuses utensil has advantages such as easy operation, safe risk-free, joint fusion rate height.

For solving the technical problem the utility model discloses the technical scheme who adopts does:

a cervical vertebra facet joint fusion cage comprises a supporting part and a strutting part connected with the supporting part; the opening part comprises a spiral propelling hole, and a spiral propelling rod matched with the spiral propelling hole is arranged in the spiral propelling hole; a plurality of spreading teeth are sequentially arranged on the outer wall of the spiral propelling hole from top to bottom, and one end of each spreading tooth is connected with the spiral propelling rod; the opening teeth are arranged along the propelling direction of the spiral propelling rod in a downward inclined mode; and two sides of the opening part are provided with bone grafting windows which are sunken inwards, and the bone grafting windows are filled with bone grafts.

As the embodiment of the utility model provides a preferred, the supporting part is plate-shaped curved surface structure, the supporting part is inwards sunken to laminate mutually with cervical vertebra side piece rear.

Preferably, the support portion is provided with a fixing screw, and the fixing screw is located at a lowermost side portion of the support portion.

As the embodiment of the utility model provides a preferred the top of screw propulsion pole is provided with the thread connection groove with screw wrench matched with, thread connection groove is connected with screw propulsion pole formula as an organic whole.

As the embodiment of the utility model provides a preferred set up on the supporting part with screw thread connection groove matched with spanner import.

As the utility model discloses the preferred, the surface of strutting the portion is equipped with a plurality of cockscomb structure barbs, the cockscomb structure barb is laminated with the facet joint mutually.

As the utility model discloses the preferred, prop open the tooth including strutting the tooth body and setting up the tooth connector that struts who struts tooth body both sides, prop open the tooth connector and cooperate with the screw propulsion pole of screw propulsion downthehole portion, prop open the tooth body and expose outside the screw propulsion hole. Compared with the prior art, the utility model following beneficial effect has:

cervical vertebra facet joint fuse ware, carry out the joint when carrying out the joint suddenly the joint fuse and strut and plant the bone, can make joint clearance increase fuse, realize the wicresoft operation of little passageway, place cervical vertebra facet joint slippage and reset, stability increases, has easy operation, safe risk-free, biocompatible and osteoinduction is good, the advantage that joint fusion rate is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of the cervical facet joint fusion cage of the present invention.

FIG. 2 is a sectional view of the structure of the portion A-A shown in FIG. 1;

fig. 3 is a schematic structural view of the distraction teeth of the present invention.

Shown in the figure: 1. supporting part, 1.1, set screw, 1.2, spanner import, 2, strut the portion, 2.1, spiral propulsion hole, 2.2, spiral propulsion pole, 2.3, strut the tooth, 2.31, strut the tooth body, 2.32, strut the tooth connector, 2.4, bone grafting window, 2.5, thread connection groove, 3, cockscomb structure barb.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 2, an embodiment of the present invention provides a cervical facet joint fusion cage, which specifically includes a supporting portion 1 and a spreading portion 2 connected to the supporting portion 1; wherein, supporting part 1 is plate-shaped curved surface structure, and specific supporting part 1 is inwards sunken to be laminated with the side piece at cervical vertebra side piece rear mutually, plays the effect of being convenient for to fix in the use. Prop the portion 2 and set up the bottom that is connected with supporting part 1 in the lower part position of supporting part 1, prop portion 2 and specifically include spiral propulsion hole 2.1 be equipped with matched with spiral propulsion pole 2.2 with it in spiral propulsion hole 2.1 (in this embodiment, the internal surface in spiral propulsion hole 2.1 is equipped with the internal thread, is equipped with the external screw thread at spiral propulsion pole 2.2's surface, and the internal thread cooperatees with the external screw thread). A plurality of spreading teeth 2.3 are sequentially arranged on the outer wall of the spiral propelling hole 2.1 from top to bottom, one end of each spreading tooth 2.3 is connected with the spiral propelling rod 2.2, and the spreading teeth 2.3 are arranged in a downward inclined mode along the propelling direction (the direction indicated by the arrow in the figure 2) of the spiral propelling rod 2.2. When the spiral pushing rod 2.2 moves along the pushing direction, the spiral pushing rod 2.2 can drive the opening teeth 2.3 to move downwards, at the moment, the opening teeth 2.3 can be slowly opened in the downward movement process (namely, the opening teeth 2.3 are slowly upwards tilted), and then the small joints on the two sides are opened, so that the gap between the small joints is increased and fused, and the minimally invasive operation of the small channel is realized. The two sides of the strutting part 2 are provided with bone grafting windows 2.4 which are sunken inwards, and bone grafting can be filled through the bone grafting windows 2.4, thereby being more beneficial to the growth and fusion of bones among the facet joints.

Referring to fig. 1, a fixing screw 1.1 is provided on the supporting portion 1, wherein the fixing screw 1.1 is located at the lowest side portion of the supporting portion 1 (specifically, at the position at the lower left of the supporting portion 1), and the whole structure (in this embodiment, the whole structure includes the supporting portion 1 and the opening portion 2) can be fixed on the surface of the cervical vertebra side block by the fixing screw 1.1, which is beneficial to the stability of the whole structure and facilitates the bone growth and fusion between joints.

Referring to fig. 1 to 2, a screw connection groove 2.5 matched with a screw wrench (not shown) is arranged at the top of the screw propulsion rod 2.2, wherein the screw connection groove 2.5 is connected with the screw propulsion rod 2.2 in an integrated manner. In this embodiment, the threaded connection 2.5 is a socket head cap threaded connection that mates with a socket head cap wrench. The supporting part 1 is provided with a wrench inlet 1.2 matched with the threaded connecting groove 2.5. In this embodiment, insert threaded wrench to threaded connection groove 2.5 internal rotation threaded wrench through spanner import 1.2, like this, drive screw propulsion pole 2.2 through threaded wrench and in screw propulsion hole 2.1 downstream, then drive through screw propulsion pole 2.2 and prop out tooth 2.3 and upwards perk and strut both sides facet joint.

Referring to fig. 1, the outer surface of the opening part 2 is provided with a plurality of saw-toothed barbs 3, and the saw-toothed barbs 3 are attached to the facet joints, so that the fusion cage has good stability and is beneficial to fusion. In this embodiment, prop open tooth 2.3 including strutting tooth body 2.31 and setting and be in prop open the tooth connector 2.32 that struts of tooth body 2.31 both sides, prop open tooth connector 2.32 and cooperate with the spiral push rod 2.2 of spiral propulsion hole 2.1 inside, prop open tooth body 2.31 and expose outside spiral propulsion hole 2.1.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A cervical vertebra facet joint fusion cage is characterized in that: comprises a supporting part (1) and a strutting part (2) connected with the supporting part (1);

the opening part (2) comprises a spiral propelling hole (2.1), and a spiral propelling rod (2.2) matched with the spiral propelling hole (2.1) is arranged in the spiral propelling hole (2.1); a plurality of spreading teeth (2.3) are sequentially arranged on the outer wall of the spiral propelling hole (2.1) from top to bottom, and one end of each spreading tooth (2.3) is connected with the spiral propelling rod (2.2); the opening teeth (2.3) are arranged along the propelling direction of the spiral propelling rod (2.2) in a downward inclined mode; two sides of the strutting part (2) are provided with bone grafting windows (2.4) which are sunken inwards, and the bone grafting windows (2.4) are filled with bone grafting.

2. The cervical facet joint fusion cage of claim 1, wherein: the supporting part (1) is of a plate-shaped curved surface structure, and the supporting part (1) is inwards sunken to be attached to the rear part of the cervical vertebra side block.

3. The cervical facet joint fusion cage of claim 1, wherein: the supporting part (1) is provided with a fixing screw (1.1), and the fixing screw (1.1) is positioned on the side part of the lowest part of the supporting part (1).

4. The cervical facet joint fusion cage of claim 1, wherein: the top of the spiral propelling rod (2.2) is provided with a thread connecting groove (2.5) matched with a thread wrench, and the thread connecting groove (2.5) is connected with the spiral propelling rod (2.2) in an integrated manner.

5. The cervical facet joint cage according to claim 4, wherein: the supporting part (1) is provided with a wrench inlet (1.2) matched with the threaded connecting groove (2.5).

6. The cervical facet joint fusion cage of claim 1, wherein: the outer surface of the strutting part (2) is provided with a plurality of saw-toothed barbs (3), and the saw-toothed barbs (3) are attached to the facet joints.

7. The cervical facet joint fusion cage of claim 1, wherein: prop out tooth (2.3) including strutting tooth body (2.31) and setting up strutting tooth connector (2.32) strutting of tooth body (2.31) both sides, prop out and cooperate with spiral propulsion pole (2.2) inside spiral propulsion hole (2.1) tooth connector (2.32), prop out and open tooth body (2.31) and expose in spiral propulsion hole (2.1) outside.