Interbody fusion cage

Abstract

The utility model relates to the technical field of medical instruments, in particular to an interbody fusion cage which comprises an upper fusion plate, a lower fusion plate, a left traction block and a right pushing block, an upper sliding groove, a lower sliding groove, an upper protruding block and a lower protruding block are arranged on the upper fusion plate and the lower fusion plate, and a left sliding groove, a right sliding groove, a left protruding block and a right protruding block which are matched are arranged on the upper fusion plate, the lower fusion plate, the left traction block and the right pushing block. The upper fusion plate and the lower fusion plate are arranged on the left traction block and the right pushing block, adjusting assemblies for adjusting the distance between the upper fusion plate and the lower fusion plate are arranged on the left traction block and the right pushing block, and each adjusting assembly comprises an inner thread ring and a screw which are arranged on the left traction block and the right pushing block and matched with each other. The distance between the upper fusion plate and the lower fusion plate is adjusted, so that the interbody fusion cage adapts to the intervertebral space, and the problem of height adjustment of the interbody fusion cage is solved; the whole structure is simple, operation is convenient, and the success rate of surgery is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an intervertebral fusion device. Background Technology

[0002] An interbody fusion device is a medical device used to treat spinal diseases, typically for fusion surgery of the cervical, thoracic, or lumbar spine. Its main function is to help the patient's spine stabilize and heal after surgery. Interbody fusion devices vary in shape and size, but they are usually made of metal or ceramic materials and filled with bone grafts or other biological materials to promote fusion between bones. These devices can be implanted into the patient's spine through minimally invasive or open surgery. Before using an interbody fusion device, the doctor will select the appropriate model and size based on the patient's specific condition. However, the height of a standard interbody fusion device deviates to the distance between the bones in the patient's spine, making it impossible to achieve a precise fit. Therefore, it is necessary to develop interbody fusion devices with adjustable dimensions so that the height of the device can be adjusted according to the patient's condition. Utility Model Content

[0003] In order to solve the problems existing in the prior art, this utility model provides an interbody fusion device to solve the problem of interbody fusion device height adjustment.

[0004] To solve the above problems, the technical solution of this utility model is as follows: An interbody fusion device includes an upper fusion plate and a lower fusion plate that are slidably connected. The upper fusion plate and the lower fusion plate are provided with matching upper and lower sliding grooves and upper and lower protrusions. A left traction block and a right propulsion block are provided on both sides of the upper fusion plate and the lower fusion plate. The upper fusion plate, the lower fusion plate, the left traction block, and the right propulsion block are provided with matching left and right sliding grooves and left and right protrusions. An adjustment component for adjusting the distance between the upper fusion plate and the lower fusion plate is provided on the left traction block and the right propulsion block.

[0005] Furthermore, the adjustment assembly includes matching internal threaded rings and screws disposed on the left traction block and the right push block.

[0006] Furthermore, the screw insertion part is located inside the internal thread ring, and the right push block is provided with a rotating groove that matches the pin part of the screw.

[0007] Furthermore, the cross-section of the left traction block is rhomboid, and the front end of the left traction block is an arc shape to facilitate deep penetration into the intervertebral space.

[0008] Furthermore, the cross-section of the right push block is triangular.

[0009] Furthermore, bone graft cavities are provided on the upper and lower fusion plates.

[0010] Furthermore, the upper and lower fusion plates are equipped with protruding teeth to prevent the interbody fusion device from slipping off.

[0011] Furthermore, the upper fusion plate, lower fusion plate, left traction block, and right propulsion block are made of bioceramic material.

[0012] Compared with the prior art, this utility model has the following advantages: rotating the screw can make the right push block move closer to the left pull block, forcing the upper fusion plate and the lower fusion plate to separate, adjusting the distance between them, so that the intervertebral fusion device can adapt to the intervertebral space, thus solving the problem of intervertebral fusion device height adjustment; the overall structure is simple, the operation is convenient, and the success rate of surgery is improved. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the right-hand push block of this utility model;

[0014] Figure 2 This is a three-dimensional structural diagram of the left traction block of this utility model;

[0015] Figure 3 This is a three-dimensional structural diagram of the intervertebral fusion device of this utility model.

[0016] In the diagram: 1. Upper fusion plate, 2. Lower fusion plate, 3. Upper and lower sliding grooves, 4. Upper and lower protrusions, 5. Left traction block, 6. Right advancement block, 7. Left and right sliding grooves, 8. Left and right protrusions, 9. Internal threaded ring, 10. Screw, 11. Bone graft cavity, 12. Protruding tooth. Detailed Implementation

[0017] like Figure 1 , Figure 2 As shown, an interbody fusion device includes an upper fusion plate 1 and a lower fusion plate 2 that are slidably connected. The upper fusion plate 1 and the lower fusion plate 2 are provided with matching upper and lower sliding grooves 3 and upper and lower protrusions 4. A left traction block 5 and a right propulsion block 6 are provided on both sides of the upper fusion plate 1 and the lower fusion plate 2. The upper fusion plate 1, the lower fusion plate 2, the left traction block 5, and the right propulsion block 6 are provided with matching left and right sliding grooves 7 and left and right protrusions 8. An adjustment component for adjusting the distance between the upper fusion plate 1 and the lower fusion plate 2 is provided on the left traction block 5 and the right propulsion block 6.

[0018] The adjustment assembly includes a matching internal threaded ring 9 and a screw 10 located on the left pull block 5 and the right push block 6.

[0019] The screw 10 has an insertion part located inside the internal thread ring 9, and the right push block 6 has a rotating groove that matches the pin part of the screw 10.

[0020] The cross-section of the left traction block 5 is rhomboid, and the front end of the left traction block 5 is an arc shape to facilitate deep penetration into the intervertebral space. The cross-section of the right push block 6 is triangular.

[0021] Bone grafting cavities 11 are provided on the upper fusion plate 1 and the lower fusion plate 2, and protruding teeth 12 are provided on the upper surface of the upper fusion plate 1 and the lower fusion plate 2 to prevent the intervertebral fusion device from slipping off.

[0022] The upper fusion plate 1, lower fusion plate 2, left traction block 5, and right propulsion block 6 are made of bioceramic material, but titanium alloy material can also be selected as needed.

[0023] During use, the interbody fusion device is implanted between the vertebral bodies. Screw 10 is rotated, and it advances into the internal thread ring 9. Simultaneously, the left and right protrusions 8 of the left traction block 5 and right advancement block 6 slide along the left and right sliding grooves 7 of the upper fusion plate 1 and lower fusion plate 2. The left traction block 5 and right advancement block 6 approach each other, while the upper and lower sliding grooves 3 and upper and lower protrusions 4 of the upper fusion plate 1 and lower fusion plate 2 slide together, separating the two and increasing the height of the interbody fusion device. Figure 3 As shown; by rotating screw 10 in the opposite direction, the distance between the upper fusion plate 1 and the lower fusion plate 2 is reduced; the height of the intervertebral fusion device can be adjusted according to the patient's intervertebral space, and finally bone cement is injected to complete the surgery. The intervertebral fusion device of this application can ensure the success of the surgery, promote the growth of bone tissue between the vertebrae, and ultimately achieve fusion.

[0024] The above specific embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An interbody fusion device, characterized in that: It includes an upper fusion plate and a lower fusion plate that are slidably connected. The upper fusion plate and the lower fusion plate are provided with matching upper and lower sliding grooves and upper and lower protrusions. The upper fusion plate and the lower fusion plate are provided with left and right pulling blocks and right pushing blocks on both sides. The upper fusion plate, the lower fusion plate, the left pulling block and the right pushing block are provided with matching left and right sliding grooves and left and right protrusions. The left pulling block and the right pushing block are provided with adjustment components for adjusting the distance between the upper fusion plate and the lower fusion plate.

2. The interbody fusion device according to claim 1, characterized in that: The adjustment assembly includes matching internal threaded rings and screws disposed on the left traction block and the right push block.

3. The interbody fusion device according to claim 2, characterized in that: The screw insertion part is located inside the internal thread ring, and the right push block is provided with a rotating groove that matches the pin part of the screw.

4. The interbody fusion device according to claim 3, characterized in that: The left traction block has a rhomboid cross-section, and its front end is an arc shape to facilitate deep penetration into the intervertebral space.

5. The interbody fusion device according to claim 4, characterized in that: The right propulsion block has a triangular cross-section.

6. The interbody fusion device according to claim 5, characterized in that: Bone graft cavities are provided on the upper and lower fusion plates.

7. The interbody fusion device according to claim 6, characterized in that: The upper and lower fusion plates are equipped with protruding teeth to prevent the interbody fusion device from slipping off.

8. The interbody fusion device according to claim 1, characterized in that: The upper fusion plate, lower fusion plate, left traction block, and right propulsion block are made of bioceramic material.

Images