CN212630972U

CN212630972U - Intervertebral fusion cage

Info

Publication number: CN212630972U
Application number: CN202020437080.8U
Authority: CN
Inventors: 朱献文; 陆国赞; 朱纬纬; 黄安琪; 韦金刚; 郜帅
Original assignee: Guangzhou Huatai 3d Material Manufacturing Co ltd
Current assignee: Guangzhou Huatai 3d Material Manufacturing Co ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2021-03-02
Anticipated expiration: 2030-03-30

Abstract

The utility model belongs to the technical field of medical instrument, especially, relate to an interbody fusion cage. The utility model provides an intervertebral fusion cage, which comprises a cage; fuse ware main part and connecting portion, fuse the ware main part and include: the front end of the fusion cage main body is provided with an upper bulge and a lower bulge, and the bulges are provided with a plurality of connecting holes; the connecting part is inserted into the connecting hole and is used for locking the fusion cage body and two adjacent upper and lower vertebral bodies. Through setting up in the connecting hole of bellied department, through connecting portion, with interbody fusion cage and adjacent centrum locking, both can effectively ensure the stability of being connected of fusion cage main part and adjacent centrum, simultaneously, owing to need not to use the steel sheet, can avoid using the big problem that reaches the postoperative recovery effect is not good of the operation degree of difficulty in the art that the steel sheet leads to, have operation process time weak point, simple structure, operation safety, location accuracy, the comfortable advantage of postoperative patient neck.

Description

Intervertebral fusion cage

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to an interbody fusion cage.

Background

Intervertebral fusion is one of the methods for treating spinal diseases, and has become the main means for treating diseases such as unstable lumbar vertebra, lumbar spinal stenosis, degenerative spondylolisthesis, degenerative scoliosis, artificial joints and degenerative intervertebral discs. Wherein, intervertebral fusion includes autologous bone grafting and allogeneic bone grafting fusion, because autologous bone grafting fusion exists: the defects of limited autogenous bone source, increased supply area trauma, failure to provide timely mechanical stability and the like cause the clinical application of the autogenous bone transplantation fusion vertebra to be limited; the allogenic bone transplantation is not only high in cost and limited in quantity, but also has the main reason that the viral transmission and the immune rejection caused by the allogenic bone are influenced to be widely applied in clinic.

In recent years, interbody fusion cage has been developed to improve the postoperative bone graft fusion rate of interbody fusion, reduce the dependency on external fixation, and improve and maintain the curvature of the spine. In the prior art, the operation treatment method using the interbody fusion cage mainly comprises the step of implanting the interbody fusion cage and a cervical vertebra fixing plate in a diseased region, and medical-grade titanium alloy and high polymer materials mainly comprising polyether-ether-ketone become two main materials for manufacturing the interbody fusion cage.

However, the polyetheretherketone polymer material cannot provide enough space for cell adhesion, and cannot be well integrated with surrounding bones, and fibrous connective tissue is easily formed at the interface. On the other hand, most titanium alloy interbody fusion cages do not have reliable locking mechanisms, the holding force between the interbody fusion cage and the adjacent vertebral bodies is low, the stability is poor, the fusion success rate between the vertebral bodies after operation is further reduced, the fusion effect is poor, and the long-term effective stability cannot be ensured; if the titanium alloy fusion cage and the steel plate are used in a combined mode, the problems that an operation wound is large, the operation is frequent, operation steps are multiple, the time is long, and the time consumption of postoperative healing is long exist, the intervertebral fusion cage is usually fixed in front of a vertebral body and behind an esophagus, incisura of the steel plate easily causes compression and influence of different degrees on the esophagus, swallowing difficulty can occur after the operation of part of patients, the life safety of the patients can be seriously endangered, meanwhile, stress shielding is caused when the steel plate is fixed to provide enough supporting force, the occurrence of the adjacent vertebra disease is easily caused, complications are easily caused, and the further clinical popularization and development of the titanium alloy intervertebral fusion cage are hindered.

Therefore, an intervertebral fusion device has been developed to solve the technical defects of the prior art that the intervertebral fusion device cannot achieve good stability, low operation difficulty and good healing effect, and thus the problem to be solved by the technical staff in the field is urgently needed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an interbody fusion cage for among the solution prior art, interbody fusion cage has the technical defect that can't compromise good stability, the operation degree of difficulty is low and good effect after healing.

The utility model provides an intervertebral fusion cage, which comprises a cage body; fuse ware main part and connecting portion, fuse the ware main part and include: the front end of the fusion cage main body is provided with an upper bulge and a lower bulge, and the bulges are provided with a plurality of connecting holes;

the connecting part is inserted into the connecting hole and is used for locking the fusion cage body and the adjacent upper and lower vertebral bodies.

Preferably, the cage body further comprises: a bone grafting bin, the bone grafting bin set up in the rear end of the fusion cage main body is used for implanting the primary bone.

Preferably, the cage body further comprises: a trabecula disposed at a rear end of the cage body.

Preferably, the trabeculae are sponge-like mesh structures.

Preferably, the trabecular bone has a porosity of 50% to 85%.

Preferably, the connection part is a screw.

Preferably, the connection part includes: the first connecting portion with the centrum locking, the second connecting portion with the integration ware main part locking, the pitch of first connecting portion is inequality with the pitch of second connecting portion.

Preferably, the length ratio of the first connecting part to the second connecting part is (1-20): 1.

Preferably, the left and right sides of the fusion cage main body are provided with a plurality of elastic fusion parts.

Preferably, the fuser body is a 3D printing fuser body.

In summary, the utility model provides an interbody fusion cage, which comprises a cage body; fuse ware main part and connecting portion, fuse the ware main part and include: the front end of the fusion cage main body is provided with an upper bulge and a lower bulge, and the bulges are provided with a plurality of connecting holes; the connecting part is inserted into the connecting hole and is used for locking the fusion cage body and the adjacent upper and lower vertebral bodies. The utility model provides an among the technical scheme, through setting up in the connecting hole of bellying, through connecting portion, with interbody fusion cage and adjacent centrum locking, both can effectively ensure the stability of being connected of fusion cage main part and adjacent centrum, simultaneously, owing to need not to use the steel sheet, can avoid using the big problem that reaches the postoperative recovery effect is not good of the operation degree of difficulty in the art that the steel sheet leads to, the utility model provides an interbody fusion cage has operation process time weak point, simple structure, operation safety, location accuracy, the comfortable advantage of postoperative patient neck. The utility model provides a pair of interbody fusion cage has solved prior art, and interbody fusion cage has the technical defect that can't compromise good stability, the operation degree of difficulty is low and good effect after healing.

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 a main body of an intervertebral fusion cage according to an embodiment of the present invention;

fig. 2 is a side view of a cage body in an intervertebral cage according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a connecting portion of an intervertebral fusion device according to an embodiment of the present invention;

the fusion cage comprises a fusion cage body 1, a protrusion 11, a connecting hole 12, a bone grafting bin 13, a trabecula 14, an elastic fusion part 15, a first connecting part 21 and a second connecting part 22.

Detailed Description

The utility model provides an interbody fusion cage for among the solution prior art, interbody fusion cage has the technical defect that can't compromise good stability, the operation degree of difficulty is low and good effect after healing.

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but 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.

For more detailed explanation of the present invention, the intervertebral fusion cage provided by the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 3, an embodiment of the present invention provides an intervertebral cage, including; fuse ware main part 1 and connecting portion, fuse ware main part 1 includes: the front end of the fusion cage main body 1 is provided with an upper bulge 11 and a lower bulge 11, and the bulges 11 are provided with a plurality of connecting holes 12; the connecting part is inserted into the connecting hole 12 and is used for locking the fusion cage body 1 and two adjacent upper and lower vertebral bodies. The utility model provides a pair of interbody fusion cage has solved prior art, and interbody fusion cage has the technical defect that can't compromise good stability, the operation degree of difficulty is low and good effect after healing.

In the technical scheme provided by the embodiment of the utility model, the two bulges 11 at the front end of the fusion cage main body 1 are fixed with the adjacent vertebral bodies through the connecting parts, so that no additional steel plate is needed, and a series of problems influencing the effect after healing caused by additional use of the steel plate can be avoided while the difficulty and complexity of the operation are reduced; meanwhile, the upper bulge 11 and the lower bulge 11 can also play a limiting role, and prevent the interbody fusion cage from being excessively deeply implanted into a vertebral body in the implantation process, so that the interbody fusion cage can be well attached to an adjacent vertebral body.

Further optimize technical scheme, the embodiment of the utility model provides an among the interbody fusion cage, fuse ware main part 1 still includes: the bone grafting bin 13 is arranged at the rear end of the fusion cage body 1 and used for implanting the primary bone. When the interbody fusion cage is implanted, partial primary bone is placed in the bone grafting bin 13, so that the process of postoperative healing recovery can be facilitated, the bone can extend in all directions during growth in the later period, the bone of the adjacent vertebral body grows into the bone grafting bin 13, and the connection strength between the interbody fusion cage and the adjacent vertebral body is further enhanced. Meanwhile, after the bone grafting bin 13 is arranged, an open space structure is formed, so that the interbody fusion cage has a certain elastic space, and the interbody fusion cage is prevented from damaging adjacent vertebral bodies due to excessive hardness.

For effectively improving the support intensity of interbody fusion cage, the embodiment of the utility model provides an among the technical scheme, fuse ware main part 1 still includes: a trabecula 14, the trabecula 14 being provided at the rear end of the cage body 1.

Further optimize technical scheme, on the basis of guaranteeing that bone trabecula 14 has sufficient support intensity, take into account with the light in order to alleviate the foreign body sensation after the implantation of fusion cage main part 1 weight and be convenient for adjacent centrum sclerotin to grow into, in the utility model provides an intervertebral fusion cage, bone trabecula 14 is sponge appearance network structure.

Therefore, further, through the test, in order to reach above-mentioned demand, carry out individualized design according to the size of the interbody fusion cage of implanting and patient's self condition, the embodiment of the utility model provides an among the technical scheme, the porosity of trabecula bone 14 is 50% ~ 85%.

On being convenient for when connecting portion connect the fusion cage main part 1 and adjacent centrum and possess enough joint strength's basis, compromise simultaneously with the small, with low costs in-service use demand of connecting portion, the embodiment of the utility model provides an among the interbody fusion cage, connecting portion are the screw.

Further optimize technical scheme, after connecting portion locking, for effectively preventing that connecting portion from withdrawing from and leading to joint strength to weaken, the embodiment of the utility model provides an among the technical scheme, connecting portion include: first connecting portion 21 and second connecting portion 22, first connecting portion 21 and centrum locking, second connecting portion 22 and the locking of fusion ware main part 1, the pitch of first connecting portion 21 is inequality with the pitch of second connecting portion 22, makes connecting portion have self-locking function like this, plays the effect that prevents to withdraw from. In the practical application process, the thread pitches of the first connection portion 21 and the second connection portion 22 only need to be different, fig. 3 is only one application form, and a person skilled in the art can specifically design the thread pitches of the first connection portion 21 and the second connection portion 22 according to a specific structure.

Further, for realizing the optimal self-locking effect of the connecting portion, effectively prevent the screw of the connecting portion from withdrawing, the embodiment of the utility model provides an among the technical scheme, the length ratio of first connecting portion 21 and second connecting portion 22 is (1 ~ 20): 1.

Further, in the process of practical application, in order to ensure that the implanted fusion device main body 1 has sufficient supporting strength, some harder materials, such as titanium alloy, are usually selected for preparing the fusion device main body 1, but a certain elasticity of the fusion device main body 1 is required in the process of daily life of a patient after implantation and in the post-operation healing stage. Therefore, the embodiment of the utility model provides an among the interbody fusion cage, the left and right sides of fusion cage main part 1 is equipped with a plurality of elasticity fusion portions 15, has effectively improved the elasticity of fusion cage main part 1. In the actual process of designing, producing and preparing the interbody fusion cage, the elastic fusion part 15 can be designed into a plurality of small windows on the left side and the right side of the fusion cage body 1, and a certain movement and growth space is provided for adjacent sclerotin of the interbody fusion cage through the plurality of structural windows.

For effectively improving the precision of fusion cage main part 1, effectively improve the fusion effect of fusion cage main part 1 and adjacent centrum, the embodiment of the utility model provides an among the interbody fusion cage, fusion cage main part 1 prints the fusion cage main part for 3D. In the specific preparation process, according to MRI or CT data of a patient, the 3D printing fusion cage main body obtained by the 3D printing mode can be closely connected and fused with a vertebral body of a part to be implanted of the patient, so that the operation difficulty is further reduced, a good operation effect is achieved, and postoperative recovery of the patient is facilitated.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An interbody cage, comprising; fuse ware main part and connecting portion, fuse the ware main part and include: the front end of the fusion cage main body is provided with an upper bulge and a lower bulge, and the bulges are provided with a plurality of connecting holes;

2. An intersomatic cage according to claim 1, wherein the cage body further comprises: a bone grafting bin, the bone grafting bin set up in the rear end of the fusion cage main body is used for implanting the primary bone.

3. An intersomatic cage according to claim 1 or 2, characterized in that the cage body further comprises: a trabecula disposed at a rear end of the cage body.

4. An intersomatic cage according to claim 3, characterized in that the trabeculae are sponge-like mesh structures.

5. An intersomatic cage according to claim 4, characterized in that the trabecular bone has a porosity of 50% to 85%.

6. An intersomatic cage according to claim 1, characterized in that the connection part is a screw.

7. An intersomatic cage according to claim 6, characterized in that the connecting portion comprises: the first connecting portion with the centrum locking, the second connecting portion with the integration ware main part locking, the pitch of first connecting portion is inequality with the pitch of second connecting portion.

8. An intersomatic cage according to claim 7, characterized in that the ratio of the lengths of the first and second connection portions is (1-20): 1.

9. An intersomatic cage according to claim 1, characterized in that the cage body is provided with a number of elastic fusion portions on both the left and right sides.

10. An intersomatic cage according to any of claims 1 to 9, characterized in that the cage body is a 3D printed cage body.