Individualized lumbar vertebra anterior lateral approach interbody fusion cage

Abstract

The utility model provides an individualized lumbar vertebra anterior lateral approach interbody fusion cage. The individualized lumbar vertebra anterior lateral approach interbody fusion cage comprises a fusion cage main body, a bone grafting cavity and a matching screw, the bone grafting cavity penetrates through the upper plane and the lower plane of the fusion cage body and is used for being connected with a vertebral body. Moreover, one end part of the interbody fusion cage main body is provided with a connecting screw which is used for being connected with an installation instrument when the interbody fusion cage main body is implanted into the intervertebral space; the other end part of the interbody fusion cage main body is provided with a screw channel, and a matching screw is inserted into the screw channel after the interbody fusion cage main body is implanted into an intervertebral space so as to realize lateral fixation; wherein the fusion cage main body is manufactured by adopting a material of which the elasticity modulus is matched with the skeleton of a patient and adopting an additive manufacturing technology based on preoperative lumbar vertebra CT (Computed Tomography) three-dimensional reconstruction data of the patient.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and particularly to a cage for an individualized anterior lateral lumbar interbody fusion (OLIF) surgery, especially a 3D printed individualized anterior lateral lumbar interbody fusion cage. Background Art

[0002] Spinal deformity is a common spinal disease that seriously affects the quality of life of patients. OLIF surgery is widely used in the treatment of lumbar diseases and the correction of spinal deformities. However, the traditional cage design lacks the ability of personalized customization and cannot fully adapt to the anatomical structure and biomechanical needs of deformed patients; in addition, the mismatch between the elastic modulus of the material and the bone may lead to stress concentration at the cage-bone interface and fusion failure.

[0003] Therefore, how to use advanced technologies to achieve personalized morphological matching and elastic modulus matching and increase the orthopedic ability has become the focus of current research. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an individualized anterior lateral lumbar interbody fusion cage aiming at the above defects in the prior art, which can effectively increase the correction ability of this type of surgery for spinal deformities.

[0005] According to the utility model, an individualized anterior lateral lumbar interbody fusion cage is provided, including: a cage body, a bone graft cavity, and matching screws; wherein, the bone graft cavity penetrates through the upper and lower planes of the cage body for connecting with the vertebral body; moreover, one end of the cage body is provided with a connecting screw thread for connecting with the installation instrument when the interbody fusion cage body is implanted into the intervertebral space; and the other end of the cage body is provided with screw channels, and the matching screws are inserted into the screw channels after the interbody fusion cage body is implanted into the intervertebral space to achieve lateral fixation.

[0006] Preferably, the cage body is manufactured by using additive manufacturing technology based on the preoperative three-dimensional reconstruction data of the patient's lumbar spine CT.

[0007] More preferably, the cage body 1 is manufactured by using additive manufacturing technology with a material having an elastic modulus matching that of the patient's bone based on the preoperative three-dimensional reconstruction data of the patient's lumbar spine CT.

[0008] Preferably, the structure of the cage body matches the anatomical structure of the patient's lumbar spine.

[0009] Preferably, the number of the screw channels is two, and each screw channel extends from the other end of the cage body to one side of the cage body respectively.

[0010] Preferably, the side part of the cage body has a serrated edge.

[0011] Preferably, the number of bone graft cavities is two, and the two bone graft cavities are located in the middle part of the fusion cage body. The bone graft cavities communicate with the outside in the vertical direction.

[0012] Preferably, the individualized anterolateral lumbar interbody fusion cage has a lateral implantation structure design, and the connecting screw thread is formed as an opening channel provided in the center of the side surface of the fusion cage body.

[0013] According to the present invention, there is also provided an individualized anterolateral lumbar interbody fusion cage, including: a fusion cage body, a bone graft cavity, and a matching screw; wherein, the bone graft cavity penetrates through the upper and lower planes of the fusion cage body for connecting with the vertebral body; moreover, one end of the fusion cage body is provided with a connecting screw thread for connecting with the installation instrument when the interbody fusion cage body is implanted into the intervertebral space; and the other end of the fusion cage body is provided with a screw channel, and the matching screw is inserted into the screw channel after the interbody fusion cage body is implanted into the intervertebral space to achieve lateral fixation; wherein the number of screw channels is two, and each screw channel extends from the other end of the fusion cage body to one side of the fusion cage body; and the individualized anterolateral lumbar interbody fusion cage has a lateral implantation structure design, and the connecting screw thread is formed as an opening channel provided in the center of the side surface of the fusion cage body.

[0014] Preferably, the fusion cage body is manufactured by an additive manufacturing technique using a material with an elastic modulus matching that of the patient's bone based on the preoperative three-dimensional reconstruction data of the patient's lumbar spine CT.

[0015] Preferably, the number of bone graft cavities is two, and the two bone graft cavities are located in the middle part of the fusion cage body. The bone graft cavities communicate with the outside in the vertical direction.

[0016] The purpose of the present invention is to propose a new OLIF fusion cage configuration to increase the correction ability of this type of surgery for spinal deformities. The fusion cage proposed by the present invention realizes personalized morphological matching and elastic modulus matching through personalized design and additive manufacturing technology. This type of OLIF fusion cage is implanted into the lumbar intervertebral space through the anterolateral approach. Through the personalized design of the matching morphology and combined with the appropriate implantation position, it provides additional orthopedic ability for the OLIF surgery. At the same time, it does not increase the surgical trauma and intraoperative blood loss, effectively reduces the risk of surgical complications, and improves the effectiveness and safety of the fusion cage in correcting spinal deformities. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] With reference to the accompanying drawings and by referring to the following detailed description, it will be easier to have a more complete understanding of the present invention and easier to understand its accompanying advantages and features, wherein:

[0018] Figure 1The front view of an individualized lumbar anterolateral approach interbody fusion device according to a preferred embodiment of the present invention is schematically shown.

[0019] Figure 2 The top view of an individualized lumbar anterolateral approach interbody fusion device according to a preferred embodiment of the present invention is schematically shown.

[0020] Figure 3 The side view of an individualized lumbar anterolateral approach interbody fusion device according to a preferred embodiment of the present invention is schematically shown.

[0021] Figure 4 An example of a matching screw for an individualized lumbar anterolateral approach interbody fusion device according to a preferred embodiment of the present invention is schematically shown.

[0022] Explanation of reference numerals:

[0023] 1. Fusion device main body, 2. Bone grafting cavity, 3. Connecting screw thread, 4. Screw channel, 5. Matching screw.

[0024] It should be noted that the drawings are used to illustrate the present invention, rather than limiting the present invention. Note that the drawings showing the structure may not be drawn to scale. And in the drawings, the same or similar elements are labeled with the same or similar reference numerals. Detailed implementation manners

[0025] In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be described in detail below in conjunction with specific embodiments and drawings.

[0026] The present invention provides an OLIF fusion device, which has a fusion cavity for bone grafting inside. The fusion device is customized according to the specific anatomical structure of the patient's lumbar spine and is manufactured by additive manufacturing technology. Its shape can accurately match the patient's anatomical structure, ensuring the best adaptability and stability during the operation, and realizing the customization of the elastic modulus of the fusion device to match the elastic modulus of the patient's bone; a lateral fixation screw channel is provided on the side of the fusion device and is used together with the supporting screw to achieve internal fixation on the side of the vertebral body.

[0027] Therefore, the present invention provides the following designs:

[0028] 1. Personalized shape matching: The design of the fusion device is based on the preoperative lumbar spine CT three-dimensional reconstruction data of the patient and is manufactured by additive manufacturing technology to ensure that its shape can accurately match the patient's anatomical structure, ensuring the best adaptability and stability during the operation; at the same time, it is ensured that the fusion device can include complex internal structures to enhance its mechanical properties and functionality.

[0029] 2. Elastic modulus matching: Through additive manufacturing technology, the material density matching the elastic modulus of the bone is achieved, stress concentration is reduced, and bone healing is promoted.

[0030] 3. By implanting matching screws through the screw channels on the side of the fusion device, lateral fixation is achieved, the stability of the fusion device is increased, and the risks related to complications are reduced.

[0031] Specifically, Figures 1 to 4 The individualized lumbar anterolateral interbody fusion device according to the preferred embodiment of the present invention is schematically shown.

[0032] Specifically, as Figures 1 to 4 shown, the individualized lumbar anterolateral interbody fusion device according to the preferred embodiment of the present invention includes: a fusion device main body 1, a bone graft cavity 2, and a matching screw 5.

[0033] Among them, the bone graft cavity 2 penetrates through the upper and lower planes of the fusion device main body 1 for connection with the vertebral body.

[0034] One end of the fusion device main body 1 is provided with a connecting screw thread 3 for connection with the installation instrument when the interbody fusion device is implanted into the intervertebral space.

[0035] The other end of the fusion device main body 1 is provided with a screw channel 4, and the matching screw 5 is inserted into the screw channel 4 after the interbody fusion device is implanted into the intervertebral space to achieve lateral fixation.

[0036] Preferably, as Figure 1 shown, the number of screw channels 4 is two, and each screw channel 4 extends from the other end of the fusion device main body 1 to one side of the fusion device main body 1 respectively.

[0037] Preferably, as Figure 1 shown, the side of the fusion device has a serrated edge. Thus, the ability to combine with the vertebral endplate can be increased, and the risk of displacement of the fusion device can be reduced.

[0038] Preferably, as Figure 2 shown, the number of bone graft cavities 2 is two, and the two bone graft cavities 2 are located in the middle part of the fusion device. The bone graft cavities are connected to the outside in the vertical direction. The fusion device main body is provided with bone graft cavities for filling autologous bone or artificial bone during the operation to promote intervertebral fusion.

[0039] As Figure 3 shown, from the side structure, the lateral implantation design of the OLIF fusion device is seen, and the connecting screw thread is formed as an opening channel provided in the center of the side of the fusion device.

[0040] In the preferred embodiment, the fusion device main body 1 is manufactured by using additive manufacturing technology based on the preoperative lumbar CT three-dimensional reconstruction data of the patient.

[0041] Moreover, further preferably, the fusion device body 1 is manufactured by additive manufacturing technology using a material with an elastic modulus matching that of the patient's bones based on the three-dimensional reconstruction data of the patient's preoperative lumbar CT.

[0042] The OLIF fusion device of the present utility model has a hexahedron-like design, with a bone graft fusion cavity in the center and both the upper and lower surfaces open. The fusion device is customized according to the three-dimensional reconstruction data of the patient's preoperative lumbar CT for the specific anatomical structure of the patient's lumbar spine, achieving precise matching of the intervertebral space morphology of the surgical segment of the patient's lumbar spine. It is made by additive manufacturing technology to achieve different elastic moduli of the fusion device. The upper and lower planes of the fusion device are provided with rough fusion surfaces in contact with the vertebral cross-section, providing a larger contact area and promoting bone graft fusion.

[0043] This embodiment has at least the following advantages:

[0044] 1. Personalized adaptation: Through 3D printing and additive manufacturing technology, the OLIF fusion device can precisely match the anatomical needs of the patient, thus providing the best support and stability during the operation.

[0045] 2. Enhanced orthopedic ability: The design of the fusion device can provide additional orthopedic ability to help better correct the lordosis and scoliosis of the spine.

[0046] 3. Biomechanical optimization: Through elastic modulus matching, the fusion device can better integrate with the bones biomechanically, promoting healing and long-term stability.

[0047] 4. Equipped with lateral screw channels to achieve lateral fixation, increasing the stability of the implant and reducing the risk related to complications.

[0048] It should be noted that unless otherwise specified, the terms "first", "second", "third", etc. in the specification are only used to distinguish each component, element, step, etc. in the specification, rather than to represent the logical relationship or sequential relationship, etc. between each component, element, step.

[0049] It can be understood that although the present utility model has been disclosed above with preferred embodiments, the above embodiments are not intended to limit the present utility model. For any person skilled in the art, without departing from the scope of the technical solution of the present utility model, many possible changes and modifications can be made to the technical solution of the present utility model by using the technical content disclosed above, or modified into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of protection of the technical solution of the present utility model.

Claims

1. An individualized anterolateral lumbar interbody fusion device, characterized in that include: A fusion device body, a bone graft cavity and a matching screw; wherein the bone graft cavity passes through the upper and lower planes of the fusion device body for connection with the vertebral body; and one end of the fusion device body is provided with a connecting screw hole for connection with the mounting instrument when the intervertebral fusion device body is implanted in the intervertebral space; and the other end of the fusion device body is provided with a screw channel, wherein the matching screw is inserted into the screw channel after the intervertebral fusion device body is implanted in the intervertebral space to achieve lateral fixation; wherein the fusion device body is based on the patient's preoperative lumbar CT three-dimensional reconstruction data, using a material with an elastic modulus matching the patient's bones, and is manufactured using additive manufacturing technology.

2. The individualized anterolateral lumbar interbody fusion cage according to claim 1, characterized in that: The structure of the cage body matches the anatomy of the patient's lumbar spine.

3. The individualized anterolateral lumbar interbody fusion cage according to claim 1 or 2, characterized in that: The number of the screw channels is two, and each screw channel extends from the other end of the fusion device body to one side of the fusion device body.

4. The individualized anterolateral lumbar interbody fusion cage according to claim 1 or 2, characterized in that: The sides of the cage body have serrated edges.

5. The individualized anterolateral lumbar interbody fusion cage according to claim 1 or 2, characterized in that: There are two bone grafting cavities, and the two bone grafting cavities are located in the middle part of the fusion device body, and the bone grafting cavities are connected with the outside in the vertical direction.

6. The individualized anterolateral lumbar interbody fusion cage according to claim 1 or 2, characterized in that: The individualized anterolateral lumbar intervertebral fusion device has a lateral implantation structure design, and the connecting screw mouth is formed as an open channel provided in the center of the side of the fusion device body.

7. An individualized anterolateral lumbar interbody fusion device, characterized in that include: A fusion device body, a bone graft cavity and matching screws; wherein the bone graft cavity passes through the upper and lower planes of the fusion device body for connection with the vertebral body; and, one end of the fusion device body is provided with a connecting screw hole for connection with the mounting instrument when the intervertebral fusion device body is implanted in the intervertebral space; and the other end of the fusion device body is provided with a screw channel, wherein the matching screw is inserted into the screw channel after the intervertebral fusion device body is implanted in the intervertebral space to achieve lateral fixation; wherein the number of the screw channels is two, and each screw channel extends from the other end of the fusion device body to one side of the fusion device body; and the individualized lumbar anterolateral approach intervertebral fusion device has a lateral implantation structure design, and the connecting screw hole is formed as an open channel provided in the center of the side of the fusion device body.

8. The individualized anterolateral lumbar interbody fusion cage according to claim 7, characterized in that: The main body of the fusion device is based on the patient's preoperative lumbar CT three-dimensional reconstruction data. It uses a material with an elastic modulus that matches the patient's bones and is manufactured using additive manufacturing technology.

9. The individualized anterolateral lumbar interbody fusion cage according to claim 7 or 8, characterized in that: There are two bone grafting cavities, and the two bone grafting cavities are located in the middle part of the fusion device body, and the bone grafting cavities are connected with the outside in the vertical direction.

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