CN202568534U

CN202568534U - Adjustable lumbar intervertebral fusion cage

Info

Publication number: CN202568534U
Application number: CN2012201403222U
Authority: CN
Inventors: 田纪伟; 董双海; 夏天
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-05
Filing date: 2012-04-05
Publication date: 2012-12-05
Anticipated expiration: 2022-04-05

Abstract

The utility model discloses an adjustable lumbar intervertebral fusion cage. The lumbar intervertebral fusion cage comprises a lower support body and an upper support body, wherein a groove body is formed on the top of the lower support body; a first reverse tooth structure is formed on one side face of the groove body; the upper support body is positioned in the groove body; a second reverse tooth structure which is meshed with the first reverse tooth structure is formed on the side face of the upper support body which corresponds to the first reverse tooth structure; and the other side of the upper support body which is opposite to the second reverse tooth structure is pivoted on the lower support body. When the adjustable lumbar intervertebral fusion cage is in use, a front flare angle between the upper and lower support bodies can be adjusted through an external tool, and the reverse tooth structures which are meshed together are used for positioning, so that the requirements of fixed angle of a lumbar segment intervertebral space and lumbar correction are met.

Description

Fusion device between adjustable lumbar vertebra

Technical field

This utility model relates to a kind of armarium, refers to fusion device between a kind of lumbar vertebra that is used for lumbar spinal fusion especially.

Background technology

Lumbar spinal fusion is the standard art formula of the multiple degenerative lumbar property disease of treatment, and wherein the fusion rate with the intervertebral fusion art is the highest, and curative effect is the most definite.Fusion device between lumbar vertebra (Cage) is the medical implant that is specifically designed to the lumbar vertebra intervertebral fusion, can play the effect of supporting intervertebral space, is widely used clinically.

Fusion device is processed by PEEK material or carbon fibre material between lumbar vertebra commonly used at present, cooperates Fig. 1 said, and there are inherent subtended angle in 3 of fifth lumbar vertebra 2 and sacrals; Be called the lumbosacral angle α of deformity of spine research association (SDSG LSA is hereinafter to be referred as lumbosacral angle), the recovery of lumbosacral angle α is to keep the equilibrated important assurance of spinal column sagittal plane; The hypocentrum surface of bone is also also non-parallel on other interspaces of lumbar vertebrae; There is inherent subtended angle, and varies with each individual, if reset for the intervertebral space that resets of increase binding face in the operation according to the Invasive lumbar fusion device of present application; Lumbosacral angle α or other sections subtended angles are significantly reduced, influence the balance of whole trunk.

Therefore, Invasive lumbar fusion device 1 if can strut the shape that becomes to have the inclination angle, can contact well with the surface of bone of the joint of vertebra up and down, can reduce the risk of fusion device sedimentation and displacement in theory, assists the recovery of normal lumbosacral angle, and possibly increase the success rate of fusion.And strut the bone grafting device between the various lumbar vertebras that also require the individuation adjustable-angle with the degenerative lumbar property disease or the wound of deformity of spine.

The utility model content

The technical problem that this utility model will solve is, provides between a kind of lumbar vertebra of adjustable angle and struts the bone grafting device, with intrinsic angle and the orthopedic needs of lumbar vertebra that adapt to a lumbar vertebra sections intervertebral space.

For solving the problems of the technologies described above; The utility model discloses fusion device between a kind of adjustable lumbar vertebra; Fusion device comprises between said lumbar vertebra: a lower support, and said lower support top is formed with a cell body, and is formed with the first pawl structure on the side of said cell body; Supporter on one; The said supporter of going up is positioned at said cell body; Be formed with on the said side of going up the corresponding said first pawl structure of supporter one with the second engaged pawl structure of the said first pawl structure, the said opposite side of going up the said relatively second pawl structure of supporter is hubbed at said lower support.

Fusion device can be regulated the anterior subtended angle between the upper and lower supporter through an external tool in use between this adjustable lumbar vertebra; And position, thereby adapt to the intrinsic angle and the orthopedic needs of lumbar vertebra of each sections intervertebral space of lumbar vertebra through engaged pawl structure.

Description of drawings

Fig. 1 is the application sketch map of fusion device between existing lumbar vertebra.

Fig. 2 is a fusion device softened state side portion structure sketch map not between this utility model lumbar vertebra.

Fig. 3 is a fusion device softened state side portion structure sketch map between this utility model lumbar vertebra

The specific embodiment

Embodiment to this utility model elaborates below in conjunction with accompanying drawing, and present embodiment is a prerequisite with this utility model technical scheme, provided detailed embodiment and concrete operating process, but the protection domain of this utility model is not limited to following embodiment.

Consult shown in Figure 2ly, fusion device 4 mainly is made up of supporter 50 on a lower support 40 and between the adjustable lumbar vertebra of this utility model, wherein:

It is one rectangular-shaped that lower support 40 profiles are; Offer a cell body 41 at its top; This cell body 41 runs through the top and a side of supporter 40 respectively; And therefore form an open top 42 and an end face opening 43, be formed with the first pawl structure 44 on the another side of cell body 41 relative these end face openings 43, and upward also be provided with down positioning tooth 45 on supporter 40 bottom surfaces;

Last supporter 50 is positioned at cell body 41; Be formed with the second engaged pawl structure 51 of the one and first pawl structure 44 on the side of the last supporter 50 corresponding first pawl structures 44; The opposite side of the last supporter 50 relative second pawl structures 51 is hubbed at cell body 41 inwalls of lower support 50, and last supporter 50 also is provided with positioning tooth 53.

Cooperate shown in Figure 3; When fusion device 4 uses between the adjustable lumbar vertebra of this utility model; Strut pincers 60 in end face opening 43 stretches into cell body 41 through one, shore supporter 50 on the supporter 40 respectively, be hubbed at cell body 41 inwalls of lower support 50 owing to a side of last supporter 50; Supporter 50 is strutted with the front end angle of lower support 40 gradually on this moment; When reaching set angle, the mutual interlock through the first pawl structure 44 and the second pawl structure 51 locks and struts angle, and accomplishes and the location of the surface of bone of vertebra joint up and down through positioning tooth 45 down and last positioning tooth 53.

Between such adjustable lumbar vertebra the surface of bone of fusion device 4 and the joint of vertebra up and down contact fusion device between the lumbar vertebra that is better than present application, can reduce the risk of fusion device sedimentation and displacement in theory, assist the recovery of normal lumbosacral angle, possibly increase the success rate of fusion.And can assist the sagittal plane of degenerative lumbar property disease and lumbar vertebra wound orthopedic, good prospects for application is arranged.

Claims

1. fusion device between an adjustable lumbar vertebra is characterized in that fusion device comprises between said lumbar vertebra:

One lower support, said lower support top is formed with a cell body, and is formed with the first pawl structure on the side of said cell body;

Supporter on one; The said supporter of going up is positioned at said cell body; Be formed with on the said side of going up the corresponding said first pawl structure of supporter one with the second engaged pawl structure of the said first pawl structure, the said opposite side of going up the said relatively second pawl structure of supporter is hubbed at said lower support.