CN204909742U - Cervical vertebra uncinate vertebral joint fusion cage - Google Patents

Abstract

The utility model discloses a cervical vertebra uncinate vertebra joint fuses ware, including uncinate vertebra joint fusion part and the elastic support body between the centrum, the cross section of elastic support body between the centrum is trapezoidal, and the front end is the tip, and uncinate vertebra joint fusion part has two, connects respectively on two waist lateral surfaces of elastic support body between the centrum, and uncinate vertebra joint fusion part is cylinder network structure, and the side that uncinate vertebra joint bone grafting fusion part kept away from the elastic support body between the centrum is connected with the baffle. The utility model discloses reduce cost, the fusion time is short, has reduced the neck brace wearing time, has improved patient's comfort level, need not the end plate of polishing, and operation time shortens, and the risk that sinks of postoperative false body reduces.

Description

Cervical Hook Vertebral Fusion Cage

technical field

The utility model relates to the field of medical instruments, in particular to a cervical hook vertebra joint fusion device.

Background technique

Cervical fusion has been widely used to treat various cervical diseases for more than half a century. Traditional intervertebral cages are expensive, costing tens of thousands of yuan per piece. Traditional intervertebral discectomy and intervertebral bone graft fusion Emphasis on "vertebral fusion"—bone grows and heals from the center of the upper and lower vertebral bodies. However, due to anatomical and physiological reasons, the distance between the upper and lower vertebral bodies, and possible blood supply and other reasons, the "crawling substitution healing journey" of the bone is long and difficult. Difficult, long healing time (patients need to wear a brace for a long time until fusion), and there is a risk of prosthesis subsidence and displacement after destroying the endplate.

Utility model content

The utility model aims to provide a cervical hook vertebra joint fusion device, which reduces the cost, shortens the fusion time, reduces the wearing time of the neck brace, improves the comfort of the patient, does not need to polish the end plate, shortens the operation time, and sinks the prosthesis after the operation Risk reduction.

In order to achieve the above object, the utility model is realized by adopting the following technical solutions:

The cervical hook-vertebral joint fusion device disclosed by the utility model comprises a hook-vertebral joint fusion component and an elastic support body between vertebral bodies. There are two fusion parts, which are respectively connected to the left and right lateral surfaces of the elastic support body between the vertebral bodies. The fusion part of the hook vertebra joint is a cylindrical mesh structure, and the bone graft fusion part of the hook vertebra joint is far away from the elastic support body between the vertebral bodies. The sides are connected with baffles.

During the operation, the hook vertebra joint should be polished or not, and the stuffed autologous or artificial bone implant device can be placed in the bone graft fusion part of the hook vertebra joint. The baffle is separated from the intervertebral foramen to prevent the bone graft from growing into the intervertebral space inside the hole.

Further, the top and bottom surfaces of the intervertebral elastic support body are provided with protruding barbs and/or circular protrusions.

Preferably, the baffle is inclined towards the rear end of the elastic support body between vertebral bodies.

Further, the rear end of the intervertebral elastic support body is provided with a card slot.

Preferably, the distance between the hook vertebra joint fusion component and the front end of the intervertebral elastic support body is smaller than the distance between the hook vertebra joint fusion component and the intervertebral elastic support body rear end.

Preferably, the material of the hook vertebra joint fusion component is titanium alloy. The metal titanium alloy material can be used for imaging positioning evaluation without affecting the patient's MRI examination.

Preferably, the material of the intervertebral elastic support body is polyether ether ketone; its elastic modulus is similar to that of cortical bone, has good biocompatibility, has strength and fatigue resistance comparable to metal materials, and can penetrate X Line, MRI or CT examinations do not produce artifacts.

Further, an X-ray-opaque developing mark is provided in the elastic support body between the vertebral bodies.

Preferably, the four corners of the trapezoid are rounded.

Preferably, the baffle is a titanium alloy plate.

The beneficial effects of the utility model are as follows:

1. This utility model makes full use of the natural advantages of the cervical spine, such as the close proximity of the uncinate joints on both sides of the human cervical spine, and the rich blood supply of the soft tissues adjacent to the uncinate joints. The implanted bone has a short crawling replacement distance, fast growth, fast fusion, and a high fusion rate. high.

2. The fusion of the bone graft is fast, so the wearing time of the neck collar is short and the patient experience is good.

3. After the intervertebral disc is removed, there is no need to polish the end plate, which is easy to operate and saves operation time and economic costs.

4. The hook vertebra joint fusion device does not damage the end plate, and the support body adopts an elastic support body, which has good biomechanical properties and reduces the risk of prosthesis subsidence.

5. The support body is anatomically designed, and the design is designed according to the shape of the upper and lower endplates of Chinese people, so that it fits better with the upper and lower endplates.

6. There are raised inverted teeth and round protrusions on the surface of the support body, which can prevent the implant from shifting.

7. The support body is made of polyetheretherketone material, which has good compatibility in imaging examination.

8. The mesh structure is adopted for the joint fusion part of the hook vertebra, which is more conducive to blood supply and bone ingrowth.

9. There is a thin titanium alloy baffle on the posterolateral side of the joint fusion part of the hook vertebra, which can prevent the bone graft from growing into the intervertebral foramen.

Description of drawings

Fig. 1 is the top view of the utility model;

Fig. 2 is the front view of the utility model;

Fig. 3 is the back view of the utility model;

In the figure: 1-elastic support body between vertebral bodies, 2-hook vertebra joint fusion component, 3-baffle plate, 4-drawing slot, 5-barb, 6-round protrusion.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Fig. 1, Fig. 2 and Fig. 3, the cervical hook vertebra joint fusion device disclosed by the utility model includes the hook vertebra joint fusion part 2 and the intervertebral elastic support body 1, and the intervertebral body elastic support body 1 adopts an anatomical type Designed to fit better with the upper and lower endplates, the material of the elastic support body 1 between the vertebral bodies is polyetheretherketone, the elastic support body 1 between the vertebral bodies is equipped with X-ray-opaque developing marks, and the elastic support body between the vertebral bodies The cross section of the body 1 is similar to a trapezoid, the four corners are rounded, the front end is a small end, and the rear end of the elastic support body 1 between the vertebral bodies is provided with a slot 4, and the slot 4 is located on the rear end surface of the elastic support body 1 between the vertebral bodies and runs through it longitudinally. Protruding barbs 5 or circular projections 6 are evenly distributed on the top and bottom surfaces of the interbody elastic support body; there are two hook-vertebral joint fusion components 2, which are respectively connected to the two waists of the intervertebral elastic support body 1 The outer side is close to the front end, the hook vertebra joint fusion part 2 is a cylindrical mesh structure, the hook vertebra joint bone graft fusion part 2 is connected with a baffle 3 on the side far away from the elastic support body 1 between the vertebral bodies, and the baffle 3 faces the vertebral body The rear end of the elastic supporting body 1 is inclined; the material of the fusion component 1 and the baffle plate 3 of the hook vertebra joint is titanium alloy.

Practical application shows that the utility model has great advantages in the fusion of hook vertebral joints, and the fusion time is 2 to 3 months (traditional intervertebral fusion time ranges from 3 to 12 months, most of which take 4 to 6 months). The wearing time of the neck collar is reduced, the comfort of the patient is improved, the endplate is not required to be polished, the operation time is shortened, and the risk of postoperative prosthesis subsidence is reduced.

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (10)

1. cervical vertebra uncovertebral joint fusion device, it is characterized in that: comprise uncovertebral joint and merge elastic support between parts and vertebral body, between described vertebral body, the lateral dimension of the rear end of elastic support is greater than the lateral dimension of front end, described uncovertebral joint merges parts two, be connected on the left and right lateral surface of elastic support between vertebral body, it is tubular network structure that uncovertebral joint merges parts, and uncovertebral joint bone-graft fusion parts are connected with baffle plate away from the side of elastic support between vertebral body.

2. cervical vertebra uncovertebral joint fusion device according to claim 1, is characterized in that: between described vertebral body, the end face of elastic support and bottom surface are equipped with protruding agnail and/or circular protrusions.

3. cervical vertebra uncovertebral joint fusion device according to claim 1, is characterized in that: described baffle plate tilts to elastic support rear end between vertebral body.

4. cervical vertebra uncovertebral joint fusion device according to claim 1, is characterized in that: between described vertebral body, elastic support rear end is provided with draw-in groove.

5. cervical vertebra uncovertebral joint fusion device according to claim 1, is characterized in that: the distance that described uncovertebral joint merges elastic support front end between parts and vertebral body is less than the distance that uncovertebral joint merges elastic support rear end between parts and vertebral body.

6. cervical vertebra uncovertebral joint fusion device according to claim 1, is characterized in that: the material that described uncovertebral joint merges parts is titanium alloy.

7. cervical vertebra uncovertebral joint fusion device according to claim 1, is characterized in that: between described vertebral body, the material of elastic support is polyether-ether-ketone.

8. cervical vertebra uncovertebral joint fusion device according to claim 1, is characterized in that: the developing mark being provided with X-ray opaque between described vertebral body in elastic support.

9. cervical vertebra uncovertebral joint fusion device according to claim 1, is characterized in that: four rounding of angle of elastic support between described vertebral body.

10. cervical vertebra uncovertebral joint fusion device according to claim 1, is characterized in that: described baffle plate is titanium alloy sheet.