Guided arc intervertebral fusion cage kit

Abstract

The utility model discloses a kind of guiding formula arc intervertebral fusion cage sets, it includes: shaft sleeve, intervertebral fusion cage and guide needle, the shaft sleeve includes: first blocking part and second blocking part, the intervertebral fusion cage is housed in the shaft sleeve, the intervertebral fusion cage is configured to rotate radially from the shaft sleeve, the guide needle is configured to pass through the intervertebral fusion cage to guide the intervertebral fusion cage to target position, when carrying out spinal interbody fusion cage fusion, intervertebral fusion cage can be guided to the vertebral body opening of target, is implanted with the rotation to comply with the arc of vertebral body, to avoid injury surrounding nerve root or soft tissue, and reduce the opening area required for operation, reach the requirement of wound range minimization.

Description

Technical Field

[0001] This utility model relates to a guided arc-shaped interbody fusion device set, specifically a guided arc-shaped interbody fusion device set used in spinal interbody fusion surgery. Background Technology

[0002] The human spine is composed of vertebrae and intervertebral discs. The intervertebral discs are located between two adjacent vertebrae and act as a buffer. They are fixed by ligaments and small spinal joints. The spine is a key structure that supports the trunk and protects the spinal cord and nerve roots inside.

[0003] However, spinal degeneration, prolonged poor posture, or disease can easily lead to lateral curvature of the spine, causing kyphosis or scoliosis, or reducing the height of the intervertebral discs, shortening the distance between two adjacent vertebrae, and thus compressing nerves, causing unbearable neck or lumbar pain, and even affecting daily physiological activities. When spinal nerve compression occurs, medical personnel usually perform minimally invasive lumbar spine surgery, which involves fixing multiple bone screws between vertebrae in a specific segment of the vertebrae to prevent displacement of the vertebrae in that segment, thereby relieving the nerve compression.

[0004] During minimally invasive lumbar spine surgery, the surgical site is close to the spinal cord, making it easy to damage surrounding nerve roots or soft tissues. This can cause muscle weakness and loss of sensation in the areas they innervate. Postoperative local swelling or scar tissue can also cause nerve compression. Furthermore, conventional techniques for placing interbody fusion cages require a larger incision because the cage and its surgical manipulator are at a fixed angle. This necessitates implanting the cage at a specific angle in the target location, leading to a longer healing time and increasing the risk of inflammation or infection, resulting in significant postoperative discomfort.

[0005] In summary, the inventors of this utility model conceived and designed a guided arc-shaped interbody fusion device set in order to develop it to meet actual needs and thus promote its industrial application. Utility Model Content

[0006] In view of the shortcomings of the prior art, the inventor of this utility model has been eager to improve and innovate, and has developed a new type of guided arc-shaped interbody fusion device to further avoid damage to surrounding nerve roots or soft tissues, and reduce the size of the micro-trauma incision.

[0007] The purpose of this utility model is to provide a guided arc-shaped interbody fusion device kit, which includes: a bushing, an interbody fusion device, and a guide needle. The bushing includes: a first blocking part and a second blocking part. The interbody fusion device is housed in the bushing. The interbody fusion device is configured to extend radially from the bushing. The guide needle is configured to pass through the interbody fusion device to guide the interbody fusion device to a target position.

[0008] Preferably, the bushing includes a fixing part, and the inner surface of the fixing part includes a first thread.

[0009] Preferably, the guided arc-shaped interbody fusion device further includes a rotating member, the rotating member including a second thread, the rotating member rotating to rotate the second thread along the first thread, thereby controlling the radial rotation of the interbody fusion device to extend out from the bushing.

[0010] Preferably, the curvature of the intervertebral fusion device is greater than the curvature of the bushing.

[0011] Preferably, the first blocking portion is configured to convert the linear motion of the interbody fusion device into radial motion.

[0012] Preferably, the second blocking portion defines the rotation center of the radial movement of the intervertebral fusion device.

[0013] Preferably, the bushing further includes a buffer opening configured to provide space for radial rotation of the interbody fusion device.

[0014] The beneficial effects of this invention lie in providing a guided arc-shaped interbody fusion cage kit. During spinal interbody fusion surgery, the interbody fusion cage can be guided to the target vertebral opening through a guide needle along the opening of the endoscope. During guidance, the interbody fusion cage is covered by the sleeve, which avoids damage to surrounding nerve roots or soft tissues. When the target position is reached, the interbody fusion cage can be radially rotated to conform to the curvature of the vertebral body and implanted tightly against the inner wall of the annulus fibrosus. The endplate at this position has better support, reducing the occurrence of implant subsidence. In addition, this kit can also reduce the opening area required for surgery, achieving the requirement of minimizing the wound area, reducing wound healing time and the possibility of infection and inflammation, allowing patients to resume normal activities more quickly after surgery.

[0015] The following detailed description, using specific embodiments and accompanying drawings, will make it easier to understand the purpose, technical content, features, and effects achieved by this utility model. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below.

[0017] Figure 1 This is a schematic perspective view of the guided arc-shaped interbody fusion device kit of this utility model;

[0018] Figure 2 This is a schematic perspective view of the guided arc-shaped interbody fusion device of this utility model from another angle.

[0019] Figure 3 This is a schematic perspective view of the bushing of the guided arc-shaped interbody fusion device assembly of this utility model;

[0020] Figure 4 This is a schematic perspective view of the bushing of the guided arc-shaped interbody fusion device of this utility model from another angle.

[0021] Figure 5 This is a schematic perspective view of the interbody fusion device of the guided arc-shaped interbody fusion device set of this utility model;

[0022] Figure 6 This is a schematic perspective view of the interbody fusion device of the guided arc-shaped interbody fusion device set of this utility model from another angle.

[0023] Figures 7A to 7C This is a schematic diagram illustrating the operation of the guided arc-shaped interbody fusion device of this utility model.

[0024] Figure 8 This is a flowchart illustrating the operation of the guided arc-shaped interbody fusion device of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1: Guided arc-shaped interbody fusion device set;

[0027] 2: Target location;

[0028] 10: Bushing;

[0029] 11: First blocking section;

[0030] 12: Second blocking section;

[0031] 13: Bushing outlet;

[0032] 14: Buffer opening;

[0033] 15: Fixing part;

[0034] 16: First thread;

[0035] 20: Interbody fusion device;

[0036] 21: First through hole;

[0037] 22: Second through hole;

[0038] 23: Fusion surface;

[0039] 24: Hollow section;

[0040] 30: Guide pin;

[0041] 40: Rotating component;

[0042] 41: Second thread;

[0043] 50: Working protective cover. Detailed Implementation

[0044] To clearly illustrate the utility model's features, content, advantages, and achieved effects, the present utility model is described in detail below with reference to the accompanying drawings. Furthermore, the drawings used herein are for illustrative and supplementary purposes only and may not represent the actual proportions and precise configurations of the present utility model in practice. Therefore, the scope of the present utility model in actual implementation should not be limited by the proportions and configurations of the accompanying drawings.

[0045] To provide a more complete and clear disclosure of the technical content, creative purpose, and effects achieved by this utility model, they are described in detail below, and please refer to the disclosed drawings and figures as well.

[0046] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic perspective view of the guided arc-shaped interbody fusion device kit of this utility model. Figure 2 This is a schematic perspective view of the guided arc-shaped interbody fusion device assembly of this utility model from another angle.

[0047] This utility model provides a guided arc-shaped interbody fusion device kit 1, which includes: a sleeve 10, an interbody fusion device 20, a guide needle 30, and a rotating component 40 (see Figures 7B to 7C). When performing interbody fusion surgery with the spinal interbody fusion device 20, the guide needle 30 can be inserted into the target position along the opening of the endoscope to assist in alignment. Then, the interbody fusion device 20 is guided or slid to the target vertebral opening through the guide needle 30. Finally, the guide needle 30 is removed, so that the interbody fusion device 20 can be moved away from the sleeve 10.

[0048] Please refer to the following: Figure 3 and Figure 4 , Figure 3 This is a schematic perspective view of the bushing of the guided arc-shaped interbody fusion device assembly of this utility model. Figure 4This is a schematic perspective view of the bushing of the guided arc-shaped interbody fusion device assembly of this utility model from another angle.

[0049] The sleeve 10 is provided with a first blocking part 11, a second blocking part 12, a sleeve outlet 13, a buffer opening 14, and a fixing part 15. The size and shape of the sleeve 10 are suitable for accommodating the interbody fusion device 20, which can prevent the interbody fusion device 20 from damaging surrounding nerve roots or soft tissues during its movement to the target position. The sleeve 10 is bean-shaped with a slight curvature and a central angle between 135° and 170°. The first blocking part 11 is located at the top of the sleeve 10, defining the direction of movement of the interbody fusion device 20. By blocking the linear movement of the interbody fusion device 20, it converts the linear movement into radial movement, moving it to the sleeve outlet 13. The second blocking part 12 is located in the middle recess of the sleeve 10, preventing the horizontal displacement of the interbody fusion device 20 from disengaging from the sleeve 10, and also serving as the rotation center for the radial movement of the interbody fusion device 20, causing the interbody fusion device 20 to rotate radially along the second blocking part 12. A bushing outlet 13 is located on the upper side of the bushing 10 and is defined by a first blocking portion 11 and a second blocking portion 12, allowing the interbody fusion device 20 to exit the bushing 10 from the bushing outlet 13. A buffer opening 14 is located in the middle of the bushing 10 to provide radial rotation space for the interbody fusion device 20, preventing it from getting stuck inside the bushing 10. A fixing portion 15 is located at the end of the bushing 10, and the inner surface of the fixing portion 15 is provided with a first thread 16.

[0050] Please refer to the following: Figure 5 and Figure 6 , Figure 5 This is a schematic perspective view of the interbody fusion device in the guided arc-shaped interbody fusion device set of this utility model. Figure 6 This is a schematic perspective view of the interbody fusion device of the guided arc-shaped interbody fusion device set of this utility model from another angle.

[0051] The interbody fusion device 20 is housed within the bushing 10 and can extend radially out of the bushing 10. The curvature of the interbody fusion device 20 is greater than that of the bushing 10, and it has a central angle between 100° and 150°. The interbody fusion device 20 has a first through hole 21, a second through hole 22, a fusion surface 23, and a hollow portion 24. The first through hole 21 is located at the top of the interbody fusion device 20, i.e., near the bushing outlet 13, while the second through hole 22 is located at the end of the interbody fusion device 20, i.e., near the fixing portion 15 of the bushing 10. The first through hole 21 and the second through hole 22 are coaxially arranged, allowing the guide needle 30 to pass through both the first through hole 21 and the second through hole 22. The fusion surface 23 of the interbody fusion device 20 is the surface that contacts the vertebral body, and it has a plurality of grooves, threads, or openings, thus having an uneven or serrated surface. The interbody fusion cage 20 has a hollow portion 24 to allow bone growth into the interbody fusion cage 20.

[0052] Please refer to the following: Figures 7A to 7C , Figures 7A to 7C This is a schematic diagram illustrating the operation of the guided arc-shaped interbody fusion device of this utility model.

[0053] The rotating member 40 can be used with a surgical grip (not shown). The end of the rotating member 40 is provided with a second thread 41. By rotating, the second thread 41 of the rotating member 40 rotates along the first thread 16 in the fixing part 15 of the bushing 10, and gradually advances into the bushing 10 to provide a linear motion force to push the interbody fusion device 20 forward. This controls the interbody fusion device 20 to rotate radially through the first blocking member and extend out of the bushing 10 to reach the target position.

[0054] Please see Figure 8 , Figure 8 This is a flowchart illustrating the operation of the guided arc-shaped interbody fusion device of this utility model.

[0055] First, insert the working sleeve 50 at the target position 2. The working sleeve 50 is a cylindrical sleeve with a diameter larger than that of the guide needle 30. Insert the guide needle 30 into the working sleeve 50 and pass it through the working sleeve 50. After the guide needle 30 reaches the target position 2, remove the working sleeve 50.

[0056] Then, the guided arc-shaped interbody fusion device 1 is passed through the guide needle 30, and after the guided arc-shaped interbody fusion device 1 is inserted into the target position 2 along the guide needle 30, the guide needle 30 is removed, and the interbody fusion device 20 is pushed out, so that the interbody fusion device 20 moves radially away from the sleeve 10 along the sleeve 10 and advances to the target position 2.

[0057] Finally, the interbody fusion device 20 is completely pushed out of the sleeve 10, and the sleeve 10 is removed after the interbody fusion device 20 reaches the inside of the target position 2, so that the interbody fusion device 20 can be implanted into the spinal vertebral body with the curvature conforming to the vertebral body.

[0058] The bushing 10, interbody fusion device 20, guide pin 30, and rotating component 40 of the guided arc-shaped interbody fusion device assembly 1 of this utility model can be made of the same or different materials, and can be metals, organic polymers, or inorganic materials. Examples of metals include, but are not limited to, biocompatible metals such as titanium, platinum, gold, silver, iron, or alloys of the above metals. Examples of organic polymers include, but are not limited to, bioabsorbable organic polymers such as ultra-high molecular weight polyethylene (UHMWPE), high-density polyethylene, polymethyl methacrylate (PMMA), nylon, silicone rubber, polytetrafluoroethylene, polysilicon, polyethylene, block polyether urethane (SPEU) elastomers, their analogues, or combinations thereof. Examples of inorganic materials include, but are not limited to, bioceramics, bioglass, or carbon materials.

[0059] In summary, the beneficial effects of this utility model lie in providing a guided arc-shaped interbody fusion cage kit. During spinal interbody fusion surgery, the interbody fusion cage can be guided to the target vertebral opening through a guide needle along the endoscopic opening. During guidance, the sleeve covers the interbody fusion cage, preventing damage to surrounding nerve roots or soft tissues. Upon reaching the target position, the interbody fusion cage can be radially rotated to conform to the curvature of the vertebral body and implanted tightly against the inner wall of the annulus fibrosus. The endplate at this position provides better support, reducing the likelihood of implant subsidence. Furthermore, this kit can reduce the required surgical opening area, minimizing the wound area, reducing wound healing time and the possibility of infection and inflammation, allowing patients to resume normal activities more quickly after surgery.

[0060] Through the above description of the embodiments, the operation, use and effects of this utility model can be fully understood. However, the above-described embodiments are only preferred embodiments of this utility model and should not be used to limit the scope of implementation of this utility model. That is, simple equivalent changes and modifications made according to the claims and description of this utility model are all within the scope of this utility model.

Claims

1. A guided arc intervertebral fusion cage kit, comprising: include A bushing, the bushing comprising: a first blocking portion and a second blocking portion; An interbody fusion device, housed within the sleeve, the interbody fusion device configured to extend radially out of the sleeve; and A guide needle is configured to pass through the interbody fusion device to guide it to a target location.

2. The guided arcicular interbody fusion cage set of claim 1, wherein, The bushing includes a fixing part, and the inner surface of the fixing part includes a first thread.

3. The guided arcicular interbody fusion cage set of claim 2, wherein, It further includes a rotating component, which includes a second thread, and the rotating component rotates to cause the second thread to rotate along the first thread, thereby controlling the radial rotation of the intervertebral fusion device to extend out from the bushing.

4. The guided arcicular interbody fusion cage set of claim 1, wherein, The curvature of the interbody fusion device is greater than that of the bushing.

5. The guided arcicular interbody fusion cage set of claim 1, wherein, The first blocking portion is configured to convert the linear motion of the interbody fusion device into radial motion.

6. The guided arcicular interbody fusion cage set of claim 1, wherein, The second blocking portion defines the rotation center of the radial movement of the interbody fusion device.

7. The guided arcicular interbody fusion cage set of claim 5, wherein, The bushing further includes a buffer opening configured to provide space for radial rotation of the interbody fusion device.

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