Expandable zero-incisura 3D printing artificial vertebral body

Abstract

The utility model relates to the technical field of medical instruments, and discloses an expandable zero-incisura 3D printing artificial vertebral body which comprises two symmetrically arranged cover bodies, a main body connecting the two cover bodies and screws arranged on the two cover bodies. The cover body comprises a frame and a bone grafting window arranged on the frame, a mounting hole is formed in the bone grafting window in a penetrating manner, two grooves are symmetrically formed in the edge of the mounting hole, and two fixing holes for inserting screws are formed in the solid frame in a penetrating manner; the body comprises a cylindrical supporting part and a threaded supporting part connected with the cylindrical supporting part, inserting pieces are arranged at the two ends of the cylindrical supporting part and the two ends of the threaded supporting part, and protrusions matched with the grooves are arranged on the inserting pieces. The bone grafting window is of an imitated bone trabecula structure. A bolt is arranged at the joint of the cylindrical supporting part and the threaded supporting part. The screws are longer than the fixing holes. The corners of the cover body are arranged to be smooth curves. The height of the artificial vertebral body can be accurately adjusted to be matched with the anatomical structure of a patient, the automatic locking function is achieved, and stability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to an expandable zero-profile 3D printed artificial vertebral body. Background Art

[0002] With the progress of materials science and science and technology, the combination of medicine and engineering is getting closer and closer, and various difficult and complicated diseases are effectively treated. The spine, as one of the three pillars in orthopedics, has developed particularly rapidly. Artificial vertebrae are a kind of clinically commonly used medical device products used to replace the intervertebral and vertebral bodies of the human spine to effectively treat the corresponding spinal diseases. There are two types of products that are widely used in the market. The first is the traditional titanium mesh product, which is a mesh structure with a longer length. It is cut and used according to the needs of the patient during the operation. Because this product needs to be cut during the operation, the height of the cut product is often inaccurate, the two ends of the product are uneven, and there are many burrs and spikes, which can easily cause damage to the upper and lower final versions, causing collapse and displacement. The second is the movable artificial vertebra. During the use of this product, the height is often adjusted before implantation, and it cannot be adjusted after implantation. The vertebral body itself is not fixed and may fall off. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides an expandable zero-profile 3D printed artificial vertebra that solves the problems in the prior art that the height of the artificial vertebra cannot be adjusted after implantation and the two ends of the product are uneven.

[0004] In order to achieve the above-mentioned utility model object, the technical solution adopted by the utility model is: an expandable zero-notch 3D printed artificial vertebral body, including two symmetrically arranged cover bodies, a main body connecting the two cover bodies, and screws arranged on the two cover bodies;

[0005] The cover body includes a frame and a bone graft window arranged on the frame, a mounting hole is arranged through the bone graft window, two grooves are symmetrically arranged at the edge of the mounting hole, and two fixing holes for screw insertion are arranged through the solid frame;

[0006] The main body comprises a cylindrical support part and a threaded support part connected to the cylindrical support part. Inserts are arranged at both ends of the cylindrical support part and the threaded support part. A protrusion matching the groove is arranged on the insert.

[0007] The beneficial effects of the utility model are as follows: the height of the artificial vertebral body can be set by rotating the threaded support part through the arrangement of the cylindrical support part and the threaded support part, and can be precisely adjusted according to the patient's anatomical structure to achieve optimal adaptability. The matching arrangement of the groove and the protrusion enables the artificial vertebral body to have an automatic locking function to achieve stability. The arrangement of the screw helps to prevent the artificial vertebral body from loosening or shifting during use. The bone grafting window is conducive to the filling of the expanded graft to achieve optimal integration and natural fusion.

[0008] Furthermore, in the above-mentioned expandable zero-profile 3D printed artificial vertebral body, the bone graft window is a simulated trabecular structure.

[0009] The beneficial effects of adopting the above further scheme are: the trabecular structure has microstructural characteristics similar to natural bone tissue, can provide good biocompatibility and bioactivity, can promote the attachment and proliferation of bone cells, and promote the formation and growth of new bones. The trabecular structure has high mechanical strength and stability, and can effectively support and protect bone grafts.

[0010] Furthermore, in the above-mentioned expandable zero-profile 3D printed artificial vertebral body, bolts are provided at the connection between the cylindrical support part and the threaded support part.

[0011] The beneficial effect of adopting the above further solution is that the bolt can effectively prevent the artificial vertebral body from moving and loosening after implantation by tightly connecting the cylindrical support part and the threaded support part.

[0012] Furthermore, in the above-mentioned expandable zero-profile 3D printed artificial vertebral body, the length of the screw is greater than the length of the fixing hole.

[0013] The beneficial effect of adopting the above further scheme is that when the length of the screw exceeds the depth of the fixing hole, the screw can better penetrate the bone tissue and provide more support area, thereby increasing the fixing force and tensile strength, and can effectively prevent the loosening and displacement of the artificial vertebral body after implantation.

[0014] Furthermore, in the above expandable zero-profile 3D printed artificial vertebral body, the corners of the cover are all arranged to be smooth curves.

[0015] The beneficial effects of adopting the above further solution are: the smooth curve design can improve the biocompatibility of the artificial vertebral body and the surrounding tissues. The traditional sharp corner design may cause local stress concentration, increase the friction and wear between the implant and the surrounding soft tissues, and induce inflammatory reactions and foreign body reactions.

[0016] The beneficial effects of the utility model are as follows: the main body of the artificial vertebra adopts a connection method of a cylindrical support part and a threaded support part, and is fixed by bolts, which can improve the stability of the implant. The cylindrical support part provides the initial support and positioning function, and the threaded support part can adjust the height by rotation, which can ensure the accuracy of the position and angle of the implant in the body. The corners of the cover body are all set to smooth curves, which can improve the biocompatibility of the artificial vertebra and the surrounding tissues and reduce the occurrence of inflammatory reactions and foreign body reactions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the structure of an artificial vertebra;

[0018] Figure 2 is a schematic diagram of the structure of the cover;

[0019] Figure 3 The schematic diagram of the structure of the main body;

[0020] Among them: 1. cover body; 2. main body; 3. screw; 4. frame; 5. bone graft window; 6. mounting hole; 7. groove; 8. fixing hole; 9. cylindrical support part; 10. threaded support part; 11. insert; 12. protrusion; 13. bolt. DETAILED DESCRIPTION

[0021] 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.

[0022] like Figures 1 to 3 As shown, this embodiment provides an expandable zero-profile 3D printed artificial vertebral body, comprising two symmetrically arranged cover bodies 1, a main body 2 connecting the two cover bodies 1, and screws 3 arranged on the two cover bodies 1;

[0023] The corners of the cover 1 are all set to smooth curves, and the smooth curve design can improve the biocompatibility of the artificial vertebral body and surrounding tissues. The traditional sharp corner design may cause local stress concentration, increase friction and wear between the implant and the surrounding soft tissue, and induce inflammatory reactions and foreign body reactions.

[0024] The cover 1 includes a frame 4 and a bone graft window 5 arranged on the frame 4. The bone graft window 5 is a bone trabecular structure. The bone trabecular structure plus the bone graft window 5 are conducive to the filling of the expanded graft to achieve optimal integration and natural fusion. The setting of the bone graft window 5 also improves the placement accuracy and visualization during surgery.

[0025] A mounting hole 6 is provided through the bone graft window 5, and two grooves 7 are symmetrically provided at the edge of the mounting hole 6. Two fixing holes 8 for inserting screws 3 are provided through the solid frame 4. The length of the screw 3 is greater than the length of the fixing hole 8. The screw 3 can better penetrate the bone tissue and provide more supporting area, thereby increasing the fixing force and tensile strength, and can effectively prevent the loosening and displacement of the artificial vertebra after implantation.

[0026] The main body 2 includes a cylindrical support part 9 and a threaded support part 10 connected to the cylindrical support part 9. A bolt 13 is provided at the connection between the cylindrical support part 9 and the threaded support part 10. The height of the artificial vertebral body can be set by rotating the threaded support part 10. It can be precisely adjusted according to the patient's anatomical structure to achieve the best adaptability. Inserts 11 are provided at both ends of the cylindrical support part 9 and the threaded support part 10. A protrusion 12 matching the groove 7 is provided on the insert 11. The matching setting of the groove 7 and the protrusion 12 enables the artificial vertebral body to have an automatic locking function to achieve stability.

[0027] The artificial vertebra overcomes the problems in the prior art that the product height is inaccurate after cutting, the two ends of the product are uneven, there are many burrs and spikes, which easily cause damage to the upper and lower final plates, causing collapse and displacement, and has the characteristics of simple operation and safety.

Claims

1. An expandable zero-profile 3D printed artificial vertebral body, characterized in that: It comprises two symmetrically arranged cover bodies (1), a main body (2) connecting the two cover bodies (1), and screws (3) arranged on the two cover bodies (1); The cover body (1) comprises a frame (4) and a bone graft window (5) arranged on the frame (4); a mounting hole (6) is provided through the bone graft window (5); two grooves (7) are symmetrically provided at the edge of the mounting hole (6); and two fixing holes (8) for inserting screws (3) are provided through the frame (4); The main body (2) comprises a cylindrical support portion (9) and a threaded support portion (10) connected to the cylindrical support portion (9), inserts (11) are provided at both ends of the cylindrical support portion (9) and the threaded support portion (10), and a protrusion (12) matching the groove (7) is provided on the insert (11).

2. The expandable zero-profile 3D printed artificial vertebral body according to claim 1, characterized in that: The bone graft window (5) is a bone trabecular structure.

3. The expandable zero-profile 3D printed artificial vertebral body according to claim 1, characterized in that: A bolt (13) is provided at the connection between the cylindrical support portion (9) and the threaded support portion (10).

4. The expandable zero-profile 3D printed artificial vertebral body according to claim 1, characterized in that: The length of the screw (3) is greater than the length of the fixing hole (8).

5. The expandable zero-profile 3D printed artificial vertebral body according to claim 1, characterized in that: The corners of the cover body (1) are all arranged to be smooth curves.

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