CN202386760U

CN202386760U - Interbody fusion cage

Info

Publication number: CN202386760U
Application number: CN2011205130357U
Authority: CN
Inventors: 尚鹏; 白雪岭; 李军; 陈扬
Original assignee: Shenzhen Institute of Advanced Technology of CAS
Current assignee: Shenzhen Institute of Advanced Technology of CAS
Priority date: 2011-12-09
Filing date: 2011-12-09
Publication date: 2012-08-22
Anticipated expiration: 2021-12-09

Abstract

The utility model discloses an interbody fusion cage. The interbody fusion cage comprises fusion main bodies and column pins, wherein the fusion main bodies are provided with pin holes and channels for filling bone graft; and the column pins are arranged in the pin holes and are used for connecting and combining more than two fuse main bodies. The interbody fusion cage disclosed by the utility model has the advantages that the interbody height can be adjusted by adding or reducing the sections of the fusion main bodies according to the need of the interbody height in surgery, and the column pins are used for locked connection, so that the fused sections are more stable and firmer.

Description

Invasive lumbar fusion device

[technical field]

This utility model relates to the spinal surgery medical instruments field, particularly relates to a kind of Invasive lumbar fusion device that is used for the intervertebral fusion art.

[background technology]

The intervertebral fusion art is the effective ways of treatment spinal column regression disease.To serve as the conventional art that merges medium from three cortical bones of body, fusion rate can occur and descend, the bone grafting rate of subsiding increases, and postoperative vertebra curvature is lost even problem such as kyphosis deformity.

Traditional Invasive lumbar fusion device receives the increasing spinal column doctor's of section high praise having brought into play important effect aspect the success rate that improves interbody fusion, but along with merging increasing of sections, the problem that the vertebral body reconstruction height is difficult to grasp can occur.

[utility model content]

Based on this, be necessary to provide a kind of Invasive lumbar fusion device that can adjust the vertebral body reconstruction height.

A kind of Invasive lumbar fusion device comprises that merging main body is connected main body is merged in combination more than two pin with being used to, and offers pin-and-hole and the passage that is used to fill bone grafting on the said fusion main body, and said pin is installed in the pin-and-hole.

In a preferred embodiment, the axial perforation of the said fusion main body in said passage edge is arranged on the center of said fusion main body, and said pin-and-hole is two, is symmetricly set on the both sides of said passage.

In a preferred embodiment, plane, place, the top of said fusion main body tilts to low side, and plane, low side place tilts to the top, and draw in from a side direction opposite side each other on plane, place, said top and plane, said low side place.

In a preferred embodiment, offer on the said fusion main body be parallel to said fusion body shaft to through hole.

In a preferred embodiment, the top of said fusion main body and bottom are provided with dentation.

In a preferred embodiment, said fusion main body side offer perpendicular to said fusion body shaft to screwed hole.

In a preferred embodiment, said screwed hole is positioned at the lateral center of said fusion main body, and said screwed hole crosses said passage; Unthreaded hole is offered in the both sides of said screwed hole, and said unthreaded hole is symmetricly set on the both sides of said screwed hole.

In a preferred embodiment, the two ends of said pin are provided with expansion nut, and swell fixture is installed in the expansion nut, and the opening part of said expansion nut is round table-like, and the nut of said swell fixture is for round table-like, and are said round table-like and saidly fall round table-like correspondence.

In a preferred embodiment, said fusion main body is a polygonal body, and said passage and said pin-and-hole are slotted eye, and said pin is and the corresponding ellipticity of said pin-and-hole shape.

In a preferred embodiment, said fusion main body adopts carbon fiber reinforced polyetheretherketonecomposite composite material.

Above-mentioned Invasive lumbar fusion device can through increasing or reduce the sections adjustment intervertebral height that merges main body, use pin to lock connection according to the needs of when operation intervertebral height, makes that to merge sections more firm.

[description of drawings]

Fig. 1 is the axonometric chart of the Invasive lumbar fusion device of this utility model preferred embodiment;

Fig. 2 is the front view of Invasive lumbar fusion device among Fig. 1;

Fig. 3 is the vertical view of Invasive lumbar fusion device among Fig. 1;

Fig. 4 is the side view of Invasive lumbar fusion device among Fig. 1;

Fig. 5 is the axonometric chart that merges main body among Fig. 1;

Fig. 6 is the front view that merges main body among Fig. 1;

Fig. 7 is the side view that merges main body among Fig. 1;

Fig. 8 is the vertical view that merges main body among Fig. 1;

Fig. 9 is the axonometric chart of pin among Fig. 1.

[specific embodiment]

In order to solve the problem that the vertebral body reconstruction height is difficult to grasp, a kind of Invasive lumbar fusion device that can adjust the vertebral body reconstruction height has been proposed.

Extremely shown in Figure 9 like Fig. 1; The Invasive lumbar fusion device of the preferred embodiment of this utility model; Comprise and merge main body 110 and pin 120; Merge the passage 111 that offers pin-and-hole 115 on the main body 110 and be used to fill bone grafting, pin 120 is installed in the pin-and-hole 115, is used for connecting combination and merges main body 110 more than two.During the intervertebral fusion operation, rebuild needs highly, select the fusion main body 110 of suitable number to make up according to intervertebral; Use with make up after the pin 120 of highly corresponding length connect; Bone grafting is filled in the passage 111, and then implants intervertebral, passage 111 up/down perforations; The bone grafting at passage 111 two ends contacts with the vertebral body sclerotin, is convenient to the bony fusion of bone grafting and vertebral body.

Above-mentioned Invasive lumbar fusion device can through increasing or reduce the sections adjustment intervertebral height that merges main body 110, use pin 120 to lock connection according to the needs of when operation intervertebral height, makes that to merge sections more firm.

In the present embodiment, the direction with the line place of the center, top of merging main body 110 and bottom center serves as that fusion cylinder 110 is axial.Passage 111 is arranged on the center of merging main body 110 along the axial perforation of merging main body 110, and pin-and-hole 120 is arranged on the edge that merges main body 110.Pin-and-hole 120 is two, is symmetricly set on passage 111 both sides.

In the present embodiment; The plane, place, top of merging main body 110 tilts to low side; Plane, low side place tilts to the top; Draw in from a side direction opposite side each other on plane, place, top and plane, low side place, so that the shape after the shape of single fusion

main body

110 or 110 combinations of a plurality of fusion main body is with identical or similar with the shape of interbody space.

In the present embodiment, merge to offer on the main body 110 to be parallel to and merge the axial through hole 112 of main body 110.The setting of through hole 112 has alleviated the weight of fusion device main body 110, and simultaneously, through hole 112 up/down perforations are easy to tissue and grow into.

In the present embodiment, the top and the bottom of merging main body 110 are provided with dentation 116, and dentation 116 is used for firmly grasping the soleplate of adjacent vertebral bodies or is used for meshing with the dentation of adjacent fusion main body 110.In the time of will merging main body 110 and make up, dentation 116 engagements between the adjacent fusion main body 110.When implanting intervertebral, the dentation 116 that contacts with terminal plate of vertebral body is soleplate promptly, lateral displacement can not take place, and helps the fixing of fusion device.

In the present embodiment, the side of merging main body 110 is offered perpendicular to merging the axial screwed hole 113 of main body 110, and the axial line of screwed hole 113 is vertical with the centrage of passage 111.The setting of screwed hole 113 is convenient to install and is adopted corresponding threaded instrument fusion device to be taken out or implants intervertebral when reprocessing operation.

In the present embodiment, screwed hole 113 is positioned at and merges main body 110 lateral centers, and screwed hole 113 crosses passage 111.Offer two unthreaded holes 114 in the both sides of screwed hole 113, unthreaded hole 114 is symmetricly set on the both sides of screwed hole 113.Unthreaded hole 114 is a circular port, communicates with passage 111.

In the present embodiment, pin 120 comprises pin rod 122 and swell fixture 124, offers internal thread hole along mind-set pin rod 122 centers in the end of pin rod 122; Offer the otch that extends towards pin rod 122 middle parts again along the end of pin rod 122, otch is communicated with internal thread hole form expansion nut 122, swell fixture 124 is installed in the expansion nut 122; The opening part of expansion nut 122 is round table-like; The nut of swell fixture 124 is for round table-like, round table-like with fall round table-like correspondence so that swell fixture 124 is when screwing; The opening of nut extrusion expansion nut 122 makes the end of pin 120 expand the inwall that presses pin-and-hole 115.

In the present embodiment, merging main body 110 be polygonal body, and passage 111 and pin-and-hole 115 are slotted eye, and the radial section of pin 120 is and the corresponding ellipse of pin-and-hole 115 shapes, and avoiding when screwing swell fixture 124, pin 120 is followed rotation.

In the present embodiment, merge main body 110 and adopt carbon fiber reinforced polyetheretherketonecomposite composite material.Polyether-ether-ketone has biocompatibility, and body fluid is inertia, can transmitted X-rays, and be convenient to observation, and can establish the metal flag thing in the fusion device bone-graft fusion, show the position of fusion device.Polyether-ether-ketone is after a certain proportion of carbon fiber strengthens, and intensity is bigger, and elasticity is better.The fusion device that adopts carbon fiber reinforced polyetheretherketonecomposite composite material to process, the elastic modelling quantity of its elastic modelling quantity and osseous tissue is very approaching, is superior to the metal fusion device.

The above embodiment has only expressed several kinds of embodiments of this utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to this utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from this utility model design, can also make some distortion and improvement, these all belong to the protection domain of this utility model.Therefore, the protection domain of this utility model patent should be as the criterion with accompanying claims.

Claims

1. an Invasive lumbar fusion device is characterized in that, comprises that merging main body is connected main body is merged in combination more than two pin with being used to, and offers pin-and-hole and the passage that is used to fill bone grafting on the said fusion main body, and said pin is installed in the pin-and-hole.

2. Invasive lumbar fusion device according to claim 1 is characterized in that, the axial perforation of the said fusion main body in said passage edge is arranged on the center of said fusion main body, and said pin-and-hole is two, is symmetricly set on the both sides of said passage.

3. Invasive lumbar fusion device according to claim 1; It is characterized in that; The plane, place, top of said fusion main body tilts to low side, and plane, low side place tilts to the top, and draw in from a side direction opposite side each other on plane, place, said top and plane, said low side place.

4. Invasive lumbar fusion device according to claim 1 is characterized in that, offer on the said fusion main body be parallel to said fusion body shaft to through hole.

5. Invasive lumbar fusion device according to claim 1 is characterized in that, the top and the bottom of said fusion main body are provided with dentation.

6. Invasive lumbar fusion device according to claim 1 is characterized in that, said fusion main body side offer perpendicular to said fusion body shaft to screwed hole.

7. Invasive lumbar fusion device according to claim 6 is characterized in that, said screwed hole is positioned at the lateral center of said fusion main body, and said screwed hole crosses said passage; Unthreaded hole is offered in the both sides of said screwed hole, and said unthreaded hole is symmetricly set on the both sides of said screwed hole.

8. Invasive lumbar fusion device according to claim 1; It is characterized in that; The two ends of said pin are provided with expansion nut, and swell fixture is installed in the expansion nut, and the opening part of said expansion nut is round table-like; The nut of said swell fixture is for round table-like, and is said round table-like and saidly fall round table-like correspondence.

9. Invasive lumbar fusion device according to claim 1 is characterized in that, said fusion main body is a polygonal body, and said passage and said pin-and-hole are slotted eye, and the radial section of said pin is and the corresponding ellipse of said pin-and-hole shape.

10. according to any described Invasive lumbar fusion device in the claim 1 to 9, it is characterized in that said fusion main body adopts carbon fiber reinforced polyetheretherketonecomposite composite material.