Titanium alloy bone grafting bed

Abstract

The invention discloses a titanium alloy bone grafting bed which comprises two half vertebral plates which are symmetrically arranged, each half vertebral plate comprises a main body and a connector, each main body is in a flat plate shape, a plurality of through holes which are distributed in a display mode are formed in each main body, each through hole is a round hole with the diameter of 2.5 mm-3 mm, and a clamping column is arranged on the side edge of each main body; a first opening groove is formed in one end of the connector, the first opening groove can be clamped to the clamping column from bottom to top, a first stud is installed in the first opening groove so as to be pressed on the clamping column, a second opening groove is formed in the other end of the connector, and a fixing hole is formed in the top of the second opening groove. The second open groove can be placed on a screw rod of a pedicle screw rod system in a spinal canal decompression operation of lumbar spinal stenosis, and a second stud is installed in the fixing hole so as to be pressed on the screw rod.

Description

Technical Field

[0001] This invention relates to the technical field of surgical instruments, and specifically to a titanium alloy bone graft bed. Background Technology

[0002] After lumbar spinal decompression surgery, due to the absence of a lamina and the lack of posterior spinal structures, the spine relies entirely on anterior support. The anterior intervertebral discs have mobility, which can easily lead to internal fixation failure. For these reasons, a lamina needs to be installed during lumbar spinal decompression surgery.

[0003] During the surgery, the lamina of the affected segment is removed, resulting in a lamina defect. Existing lamina are mostly planar structures, which cannot well conform to the shape of the spine, making it easy to cause difficulties in the installation of the lamina prosthesis and postoperative screw removal, ultimately affecting the surgical outcome. Summary of the Invention

[0004] The purpose of this invention is to provide a titanium alloy bone graft bed to solve the problem of vertebral laminar defect repair after lumbar spinal decompression surgery.

[0005] Therefore, embodiments of the present invention propose a titanium alloy bone graft bed.

[0006] According to an embodiment of the present invention, a titanium alloy bone grafting bed includes two symmetrically arranged hemilamps. Each hemilamp includes a main body and a connector. The main body is flat and has a plurality of through holes arranged in an array. A snap-fit ​​post is provided on the side of the main body. One end of the connector is provided with a first opening groove, which can snap onto the snap-fit ​​post from bottom to top. A first stud is installed in the first opening groove to press against the snap-fit ​​post. The other end of the connector is provided with a second opening groove, and a fixing hole is provided at the top of the second opening groove. The second opening groove can be placed on the pedicle screw-rod system in spinal decompression surgery for lumbar spinal stenosis. A second stud is installed in the fixing hole to press against the pedicle screw. The through hole is a circular hole with a diameter of 2.5 mm to 3 mm.

[0007] In some embodiments, a polygonal hole is formed between every four of the through holes.

[0008] In some embodiments, screw holes are provided at both ends of the body along its length for mounting screws.

[0009] In some embodiments, the screw is a cortical bone screw.

[0010] In some embodiments, the longitudinal section of the first opening groove is U-shaped, and the cross section of the first opening groove is racetrack-shaped.

[0011] In some embodiments, the upper surface of the body is provided with a composite coating containing hydroxyapatite, and the composite coating further includes calcium carbonate powder.

[0012] In some embodiments, the composite coating powder is laser cladding sprayed onto the surface of the titanium alloy substrate of the main body, and the titanium alloy substrate of the main body is subjected to polarization treatment.

[0013] In some embodiments, a bone particle placement layer is provided on the composite coating.

[0014] In some embodiments, the main bodies of the two hemilamina are arranged in an abutment.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Other features and aspects of this disclosure will become clearer from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the main body of a titanium alloy bone graft bed according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of a connector in a titanium alloy bone graft bed according to an embodiment of the present invention.

[0019] Figure label:

[0020] Titanium alloy bone graft bed 100, hemilamina 101, main body 10, through hole 11, snap-fit ​​post 12, polygonal hole 13, screw hole 14, connector 20, first opening groove 21, second opening groove 22, fixing hole 23. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. However, those skilled in the art should understand that the embodiments described below are only for illustrating the present invention and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] For example Figures 1-2As shown, the titanium alloy bone graft bed 100 according to an embodiment of the present invention includes two symmetrically arranged hemilamps 101, each hemilamps 101 including a main body 10 and a connector 20.

[0023] The main body 10 is flat and has multiple through holes 11 arranged in a row. The side of the main body 10 has snap-fit ​​posts 12.

[0024] One end of the connector 20 is provided with a first opening groove 21, which can be snapped onto the snap-fit ​​post 12 from bottom to top. A first stud (not shown) is installed in the first opening groove 21 to press it onto the snap-fit ​​post 12.

[0025] The other end of the connector 20 is provided with a second opening groove 22, and the top of the second opening groove 22 is provided with a fixing hole 23. The second opening groove 22 can be placed on the pedicle screw rod system in the spinal decompression surgery for lumbar spinal stenosis. A second stud (not shown) is installed in the fixing hole 23 to press it on the pedicle screw rod.

[0026] According to the titanium alloy bone graft bed 100 of the present invention, by setting two symmetrically arranged hemilamps 101, the main body 10 in the hemilamps 101 can form a certain angle when they are connected, thereby better conforming to the morphology of the dorsal bone structure of the spine, making the installation of the lamina prosthesis more convenient, the screw-plate-bone structure more closely matched, and the screws less likely to be pulled out after surgery.

[0027] In some embodiments, such as Figures 1-2 As shown, every four through holes 11 form a polygonal hole 13.

[0028] It should be noted that the main body 10 has a mesh structure, and the through hole 11 is designed as a round hole with a diameter of 2.5-3mm, so that bone fragments will not leak into the dura mater sac and the titanium alloy bone graft bed 100 when the transplanted bone is embedded.

[0029] The titanium alloy bone graft bed 100 in this invention is made of medical titanium alloy. Medical titanium alloy has high strength, mechanical properties close to human bone, strength far superior to pure titanium, and also has the characteristics of fatigue resistance, corrosion resistance, strong plasticity and excellent biocompatibility.

[0030] In some embodiments, such as Figures 1-2 As shown, screw holes 14 are provided at both ends of the main body 10 along its length for mounting screws.

[0031] In some embodiments, such as Figures 1-2 As shown, the screw is a cortical bone screw.

[0032] In some embodiments, such as Figures 1-2As shown, the longitudinal section of the first opening groove 21 is U-shaped, and the cross section of the first opening groove 21 is racetrack-shaped.

[0033] In some embodiments, such as Figures 1-2 As shown, the upper surface of the main body 10 is provided with a composite coating containing hydroxyapatite, and the composite coating also includes calcium carbonate powder.

[0034] In some embodiments, such as Figures 1-2 As shown, the composite coating powder is laser cladding sprayed onto the surface of the titanium alloy substrate of the main body 10, and the titanium alloy substrate of the main body 10 is subjected to polarization treatment.

[0035] Preferably, the laser cladding spraying includes the following steps: first, a layer of titanium powder is laid on the cleaned titanium alloy substrate, and then a mixed powder is laid on the titanium powder, with a total powder thickness of 1 mm; laser cladding spraying is performed on the laid powder using a laser with a power of 600w~1200w and a scanning speed of 3.8~11.2mm / s, and argon is used as the protective gas.

[0036] Preferably, the polarization treatment includes the following steps: connecting the sprayed titanium alloy substrate to the anode of a constant current DC power supply, and using a titanium sheet as the cathode; placing the titanium alloy substrate and the titanium sheet simultaneously in an alkaline solution, and connecting the constant current DC power supply with a voltage of 80V, and polarizing for 3 minutes.

[0037] Preferably, the alkaline solution is a 1 mol / L NaOH solution.

[0038] In some embodiments, such as Figures 1-2 As shown, a bone particle placement layer is provided on the composite coating.

[0039] Understandably, bone grafting is performed on the composite coating. The grafted bone can be autologous bone, allogeneic bone, or artificial bone granules. The grafted bone is compacted and compacted, and the spinous processes of the vertebrae above and below the diseased vertebra are slightly trimmed to ensure full contact with the grafted bone and facilitate bone ingrowth. At the same time, various bone growth factors can be added to the grafted bone to accelerate bone healing.

[0040] In some embodiments, such as Figures 1-2 As shown, the main body 10 of the two hemi-lamina 101 is arranged in a docking manner.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A titanium alloy bone graft bed, characterized in that, It includes two symmetrically arranged hemilamina, each hemilamina comprising: The main body is flat and has multiple through holes arranged in an array. The side of the main body has snap-fit ​​posts. The connector has a first opening groove at one end, which can be snapped onto the snap-fit ​​post from bottom to top. A first stud is installed in the first opening groove to press against the snap-fit ​​post. The other end of the connector has a second opening groove, and a fixing hole is provided at the top of the second opening groove. The second opening groove can be placed on the pedicle screw rod system in spinal decompression surgery for lumbar spinal stenosis. A second stud is installed in the fixing hole to press against the pedicle screw rod. The through hole is a circular hole with a diameter of 2.5mm-3mm.

2. The titanium alloy bone graft bed according to claim 1, characterized in that, Each set of four through holes forms a polygonal hole.

3. The titanium alloy bone graft bed according to claim 1, characterized in that, Screw holes are provided at both ends of the main body along its length for mounting screws.

4. The titanium alloy bone graft bed according to claim 3, characterized in that, The screw is a cortical bone screw.

5. The titanium alloy bone graft bed according to claim 1, characterized in that, The longitudinal section of the first opening groove is U-shaped, and the cross section of the first opening groove is racetrack-shaped.

6. The titanium alloy bone graft bed according to claim 1, characterized in that, The upper surface of the main body is provided with a composite coating containing hydroxyapatite, and the composite coating also includes calcium carbonate powder.

7. The titanium alloy bone graft bed according to claim 6, characterized in that, The composite coating powder is laser cladding sprayed onto the surface of the titanium alloy substrate of the main body, and the titanium alloy substrate of the main body is subjected to polarization treatment.

8. The titanium alloy bone graft bed according to claim 7, characterized in that, A bone particle placement layer is provided on the composite coating.

9. The titanium alloy bone graft bed according to claim 1, characterized in that, The main bodies of the two hemilamina are arranged in a docking configuration.

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