3D printed lateral anterior approach interbody fusion cage

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a 3D printing lateral anterior approach interbody fusion cage which comprises an interbody fusion cage body and an insertion rod assembly arranged on the interbody fusion cage body, the insertion rod assembly comprises an insertion rod and a fixing block connected with one end of the insertion rod, and the insertion rod is arranged in an arc shape; the stability of the interbody fusion cage during initial implantation can be effectively improved through the insertion rod assembly, the interbody fusion cage is convenient to install, the fusion cage can be effectively prevented from falling off, the immediate stabilization effect is achieved, and the operation safety is improved; and the arc-shaped insertion rod facilitates installation of the insertion rod, the stability of the insertion rod can be improved, the fixing block connected with one end of the insertion rod can play a role in positioning, and the insertion rod is prevented from being hit too deep.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a 3D printed lateral anterior approach intervertebral fusion device. Background Art

[0002] Spinal fusion is the most commonly used technique in spinal surgery and is widely used to treat spinal deformities, trauma and degenerative diseases. Intervertebral fusion has the advantages of high fusion rate, correction and improvement of spinal curve, and has become one of the preferred methods for cervical and lumbar fusion. Intervertebral fusion via the lateral lumbar approach has the advantages of less trauma, no impact on nerves via the extraspinal approach, large fusion device area and not easy to collapse, high fusion rate, no damage to the ligament stability structure, and restoration of lumbar curvature. It is suitable for elderly osteoporosis patients, obese patients, revision of false joints and adjacent segment diseases. At present, most of this type of products on the market are made of PEEK material and need to be used in conjunction with steel plates. The operation is relatively cumbersome and the cost is high. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a 3D printed lateral anterior approach intervertebral fusion device, which solves the problems of the existing intervertebral fusion device being complicated to install, prone to prosthesis falling off, and poor stability.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a 3D printed lateral anterior approach intervertebral fusion device, including an intervertebral fusion device body and an insertion rod assembly arranged on the intervertebral fusion device body;

[0005] The intervertebral fusion device body is a hollow structure, with a first slot on one side of its upper surface and a second slot on one side of its lower surface; a first through hole and a second through hole are provided on one side of the intervertebral fusion device body, the second through hole is connected to the second slot, the first through hole is connected to the first slot, and an implantation hole is provided between the first through hole and the second through hole;

[0006] The plug rod assembly comprises a plug rod and a fixing block connected to one end of the plug rod, and the plug rod is arranged in an arc shape.

[0007] The beneficial effects of adopting the above technical solution are as follows: the intervertebral fusion device produced by 3D printing can realize the personalized design of the patient, and can be customized according to the specific situation of the patient, which effectively improves the accuracy and applicability of the intervertebral fusion device, and the intervertebral fusion device body with a hollow structure can increase the amount of bone chips filling, and the bone chips can enter the interior of the intervertebral fusion device body through the implantation hole, and the first groove and the second groove arranged at the lower end of the lower surface of the intervertebral fusion device can improve the fusion efficiency and fusion quality with the human body; at the same time, the rod assembly arranged on the intervertebral fusion device body can effectively improve the stability of the intervertebral fusion device during the initial implantation, and is easy to install, which can effectively prevent the fusion device from falling off, plays an immediate stabilizing role, and improves the safety of the operation; in addition, the arc-shaped rod is conducive to the installation of the rod and can improve the stability of the rod, and the fixing block connected to one end of the rod can play a positioning role to prevent the rod from being driven too deep.

[0008] Furthermore, the inclination angle between the upper surface and the lower surface of the intervertebral fusion cage body is 0° to 30°.

[0009] The beneficial effect of adopting the above technical solution is: by setting the inclination angle between the upper surface and the lower surface of the intervertebral fusion device body to 0°-30°, the upper surface and the lower surface can be designed to be parallel or angled, and the angled design can effectively restore the physiological curve of the human spine and improve the treatment effect.

[0010] Furthermore, a conical head is arranged at the other end of the intervertebral fusion device body, and the conical head is in an arc shape.

[0011] The beneficial effects of adopting the above technical solution are: the arc-shaped conical head can reduce the resistance during implantation of the intervertebral fusion device and avoid scratching the patient during implantation, thereby effectively improving the implantation efficiency and implantation safety.

[0012] Furthermore, the upper surface, the lower surface, the front surface and the rear surface of the intervertebral fusion device body are all provided with a porous structure layer, and the porous structure layer is provided with a plurality of gaps.

[0013] The beneficial effects of adopting the above technical solution are as follows: the porous structure layer can not only improve the stability of the intervertebral fusion cage, but also facilitate the growth and fusion of bone chips inside the intervertebral fusion cage, thereby improving the treatment efficiency.

[0014] Furthermore, mounting grooves are provided at the connection points between the front surface and the left side surface of the intervertebral fusion device body, and between the rear surface and the left side surface thereof.

[0015] The beneficial effect of adopting the above technical solution is that the installation groove is conducive to clamping the intervertebral fusion device, making it easy to hold the implanted intervertebral fusion device during surgery.

[0016] Furthermore, the front surface and the rear surface of the intervertebral fusion device body are in an axisymmetric arc surface structure.

[0017] The beneficial effects of adopting the above technical solution are as follows: the front surface and the rear surface of the arc surface structure can reduce the resistance during the implantation of the intervertebral fusion device, avoid scratching the patient during implantation, and effectively improve the implantation efficiency and implantation safety.

[0018] Furthermore, the cross section of the insertion rod is square, rectangular or triangular.

[0019] Furthermore, two groups of insertion rods are provided.

[0020] The beneficial effect of adopting the above technical solution is that the cross-sectional shape of the insertion rod can be determined according to the processing technology, thereby improving the applicability of the device.

[0021] In summary, the 3D printed lateral anterior approach intervertebral fusion cage provided by the utility model has the following beneficial effects:

[0022] (1) The intervertebral fusion device of the utility model is made by 3D printing technology and can be designed according to the bone structure of different patients. It can better adapt to the surgical area, reduce surgical risks, improve accuracy and practicality, and the 3D printed intervertebral fusion device has better support and stability, which is conducive to fusion.

[0023] (2) The intervertebral fusion device of the utility model is provided with an insertion rod assembly, which can effectively improve the stability of the intervertebral fusion device during initial implantation and is easy to install. It can effectively prevent the fusion device from falling off, plays an immediate stabilizing role, and improves the safety and stability of the operation.

[0024] (3) The upper surface and the lower surface of the intervertebral fusion device of the present invention can be designed to be parallel or angled. The angled design can effectively restore the physiological curve of the human spine and improve the treatment effect.

[0025] (4) The intervertebral fusion device of the utility model is provided with a porous structure layer, which can not only improve the stability of the intervertebral fusion device, but also facilitate the growth and fusion of bone chips inside the intervertebral fusion device, thereby improving the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is a bottom view of the utility model;

[0028] Figure 3 It is a left side view when the upper surface and the lower surface of the utility model are parallel;

[0029] Figure 4 It is a left side view of the utility model when the upper surface and the lower surface are at an angle;

[0030] Figure 5 This is a schematic diagram of the structure of the plug rod assembly in the utility model;

[0031] Figure 6 It is the front view of the utility model.

[0032] Among them, 1. intervertebral fusion device body; 11. first slot; 12. second slot; 13. first through hole; 14. second through hole; 15. implantation hole; 16. conical head; 17. porous structure layer; 18. mounting groove; 2. rod assembly; 21. rod; 22. fixing block. DETAILED DESCRIPTION

[0033] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0034] like Figure 1 As shown, the 3D printed lateral anterior approach intervertebral fusion device provided by the utility model includes an intervertebral fusion device body 1 and a rod assembly 2 arranged on the intervertebral fusion device body 1; when in use, the rod assembly 2 can improve the stability of the intervertebral fusion device during implantation, and it is easy to install, which can not only play an immediate stabilizing role, but also effectively prevent the fusion device from falling off, thereby improving the safety of the operation.

[0035] like Figure 5 As shown, the insertion rod assembly 2 includes an insertion rod 21 and a fixing block 22 connected to one end of the insertion rod 21. The insertion rod 21 is arranged in an arc shape, and two groups of the insertion rod 21 are arranged, and the cross-sections thereof are square, rectangular or triangular. The arc-shaped insertion rod 21 is conducive to the installation of the insertion rod 21 and can improve the stability of the insertion rod 21. The fixing block 22 connected to one end of the insertion rod 21 can play a positioning role to prevent the insertion rod 21 from being driven too deep, and the cross-sectional shape of the insertion rod 21 can be determined according to the processing technology, thereby improving the applicability of the device.

[0036] like Figure 1 and Figure 2As shown, the intervertebral fusion device body 1 is a hollow structure, a first groove 11 is provided on one side of its upper surface, and a second groove 12 is provided on one side of its lower surface; a first through hole 13 and a second through hole 14 are provided on one side of the intervertebral fusion device body 1, the second through hole 14 is connected to the second groove 12, the first through hole 13 is connected to the first groove 11, and an implantation hole 15 is provided between the first through hole 13 and the second through hole 14; the intervertebral fusion device manufactured by 3D printing can realize the personalized design of the patient, and can be customized according to the specific situation of the patient, which effectively improves the accuracy and applicability of the intervertebral fusion device, and the intervertebral fusion device body 1 with a hollow structure can increase the amount of bone chips filled, and bone chips can enter the interior of the intervertebral fusion device body 1 through the implantation hole 15, and the first groove 11 and the second groove 12 provided at the lower end of the lower surface of the intervertebral fusion device can improve the fusion efficiency and fusion quality with the human body.

[0037] In the embodiment of the present utility model, Figure 3 and Figure 4 As shown, the inclination angle between the upper surface and the lower surface of the intervertebral fusion device body 1 is 0°~30°; by setting the inclination angle between the upper surface and the lower surface of the intervertebral fusion device body 1 to 0°-30°, the upper surface and the lower surface can be designed to be parallel or angled, and the angled design can effectively restore the physiological curve of the human spine and improve the treatment effect.

[0038] like Figure 3 As shown, the connection between the front surface and the left side surface, and the connection between the rear surface and the left side surface of the intervertebral fusion device body 1 are provided with mounting grooves 18; the mounting grooves 18 are conducive to clamping the intervertebral fusion device, and are convenient for holding the implanted intervertebral fusion device during surgery.

[0039] like Figure 1 and Figure 2 As shown, a conical head 16 is provided at the other end of the intervertebral fusion device body 1, and the conical head 16 is in an arc shape; the front surface and the rear surface of the intervertebral fusion device body 1 are axisymmetric arc surface structures; the front surface and the rear surface of the arc surface structure can reduce the resistance during implantation of the intervertebral fusion device, avoid scratching the patient during implantation, and effectively improve the implantation efficiency and implantation safety; the arc-shaped conical head 16 can reduce the resistance during implantation of the intervertebral fusion device, and avoid scratching the patient during implantation, effectively improving the implantation efficiency and implantation safety.

[0040] In this embodiment, if Figure 1 and Figure 6 As shown, the upper surface, lower surface, front surface and rear surface of the intervertebral fusion device body 1 are all provided with a porous structure layer 17, and the porous structure layer 17 is provided with a plurality of gaps; the porous structure layer 17 can not only improve the stability of the intervertebral fusion device, but also facilitate the growth and fusion of bone chips inside the intervertebral fusion device, thereby improving the treatment efficiency.

[0041] In summary, the 3D printed lateral anterior approach intervertebral fusion device provided by the utility model is made by 3D printing technology, can be designed according to the bone structure of different patients, can better adapt to the surgical area, reduce surgical risks, improve accuracy and practicality, and the 3D printed intervertebral fusion device has better support and stability, which is conducive to fusion; at the same time, the rod assembly 2 can effectively improve the stability of the intervertebral fusion device during the initial implantation, and is easy to install, which can effectively avoid the fusion device from falling off, plays an immediate stabilizing role, and improves the safety and stability of the operation.

Claims

1. A 3D printed lateral anterior approach intervertebral fusion cage, characterized in that: It comprises an intervertebral fusion device body (1) and an insertion rod assembly (2) arranged on the intervertebral fusion device body (1); The intervertebral fusion device body (1) is a hollow structure, with a first slot (11) provided on its upper surface and a second slot (12) provided on its lower surface; a first through hole (13) and a second through hole (14) are provided on one side of the intervertebral fusion device body (1), the second through hole (14) is connected to the second slot (12), the first through hole (13) is connected to the first slot (11), and an implantation hole (15) is provided between the first through hole (13) and the second through hole (14); The insertion rod assembly (2) comprises an insertion rod (21) and a fixing block (22) connected to one end of the insertion rod (21); the insertion rod (21) is arranged in an arc shape.

2. The 3D printed lateral anterior approach intervertebral fusion cage according to claim 1, characterized in that: The inclination angle between the upper surface and the lower surface of the intervertebral fusion device body (1) is 0° to 30°.

3. The 3D printed lateral anterior approach intervertebral fusion cage according to claim 2, characterized in that: The other end of the intervertebral fusion device body (1) is provided with a conical head (16), and the conical head (16) is in an arc shape.

4. The 3D printed lateral anterior approach intervertebral fusion cage according to claim 3, characterized in that: The upper surface, the lower surface, the front surface and the rear surface of the intervertebral fusion device body (1) are all provided with a porous structure layer (17), and the porous structure layer (17) is provided with a plurality of gaps.

5. The 3D printed lateral anterior approach intervertebral fusion cage according to claim 4, characterized in that: The front surface and the left side surface of the intervertebral fusion device body (1) and the connection between the rear surface and the left side surface are both provided with mounting grooves (18).

6. The 3D printed lateral anterior approach intervertebral fusion cage according to claim 5, characterized in that: The front surface and the rear surface of the intervertebral fusion device body (1) are in an axisymmetric arc surface structure.

7. The 3D printed lateral anterior approach intervertebral fusion cage according to claim 1, characterized in that: The cross section of the insertion rod (21) is square, rectangular or triangular.

8. The 3D printed lateral anterior approach intervertebral fusion cage according to claim 2, characterized in that: The inserting rods (21) are provided in two groups.

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