Malleable bone bed and spinal bone grafting procedures

Abstract

The application discloses a plastic bone bed and a spinal bone surgery method, and the plastic bone bed comprises a main body and an anchor nail, the main body is formed by a titanium alloy material, a middle crease is arranged on the back surface of the main body, two side creases are arranged on the front surface of the main body, the middle crease and the two side creases on the two sides of the middle crease divide the main body into four areas, a plurality of through holes in a display arrangement are arranged in each area, a polygonal hole is formed among every four through holes, the four corners of the main body are arranged below the nail caps of the screws in the rod system, and the two ends of the middle crease are designed to be slotted, and the two side parts of the slotted part of the main body and the spine of the patient are connected together through the anchor nail. The plastic bone bed is connected with the spine of the patient through the anchor nail, and the stability of the plastic bone bed is improved.

Description

Technical Field

[0001] This invention relates to the technical field of medical devices, specifically to a malleable bone graft bed and a spinal bone grafting surgical method. Background Technology

[0002] Posterior laminectomy for spinal decompression is the most common surgical procedure for treating spinal diseases such as spinal stenosis, spinal fractures, herniated discs, bone hyperplasia, intraspinal tumors and space-occupying lesions, and severe spinal deformities. Its purpose is to relieve or reduce compression of the dura mater, spinal cord, or nerve roots caused by shortening and reduced volume of the spinal canal and lateral recesses due to these various causes. More than half of all spinal surgeries utilize laminectomy for spinal decompression to varying degrees. Post-laminar decompression surgery, internal fixation using a rod-and-screw system and bone grafting fusion are generally required. Internal fixation provides immediate spinal stability, while bone grafting fusion ensures permanent spinal stability.

[0003] Currently, bone graft beds available for repairing bone defects after laminectomy and spinal canal decompression in spinal surgery are usually fixed with screws. That is, the bone graft bed is fixed to the patient's spine with screws. However, the use of screws can increase the difficulty of the operation and have an adverse effect on the patient's postoperative recovery. Summary of the Invention

[0004] The purpose of this invention is to provide a malleable bone graft bed and a spinal bone grafting surgical method to solve the problems caused by existing screw fixation methods.

[0005] Therefore, one embodiment of the present invention provides a malleable bone graft bed.

[0006] Therefore, another embodiment of the present invention proposes a spinal bone grafting surgical method.

[0007] The malleable bone graft bed according to an embodiment of the present invention includes a main body and anchors. The back of the main body is provided with a central fold, and the front of the main body is provided with two side folds. The central fold and the two side folds located on both sides of the central fold divide the main body into four regions. Each region is provided with a plurality of through holes arranged in an array, and every four through holes form a polygonal hole. The four corners of the main body are located below the screw heads of the screws in the rod system. The two ends of the central fold are designed with slits, and the two sides of the slits of the main body can be connected to the patient's spine through the anchors.

[0008] In some embodiments, there are two anchors, which connect the two end openings of the main body to the patient's spine.

[0009] In some embodiments, notches may be cut out at the four corners of the body, and the edge portions of the notches may be positioned below the screw head.

[0010] In some embodiments, in the width direction of the body, the central crease and the two side creases located on either side of the central crease divide the width of the body into four equal parts.

[0011] In some embodiments, the thickness of the body is between 1.0 and 1.5 mm, and the depth of the center crease and the edge crease is between 0.1 and 0.3 mm.

[0012] In some embodiments, the upper surface of the body is provided with a composite coating containing hydroxyapatite.

[0013] In some embodiments, the composite coating further includes calcium carbonate powder.

[0014] 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.

[0015] In some embodiments, a bone particle placement layer is provided on the composite coating.

[0016] In some embodiments, each region is surrounded by a flat plate area.

[0017] According to an embodiment of the present invention, a spinal bone grafting surgical method is used, wherein the aforementioned malleable bone graft bed is used in a spinal bone grafting surgical procedure, the spinal bone grafting surgical method comprising:

[0018] S10, fixation of the spinal rod system near the patient's spine;

[0019] S20, the patient's laminectomy was performed;

[0020] S30, a malleable bone graft bed is placed at the patient's laminectomy site, with the two sides of the suture opening of the malleable bone graft bed placed on both sides of the patient's spine, and the malleable bone graft bed is connected to the patient's spine by anchors.

[0021] In some embodiments, the spinal bone grafting surgical method further includes:

[0022] S40, medical bone particles are spread on the surface of the spinal titanium alloy bone graft bed.

[0023] In some embodiments, the method further includes the following after step S30:

[0024] S31, the four corners of the plastic bone graft bed are cut to create four notches, the edges of which can be positioned below the screw caps in the spinal rod system.

[0025] 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

[0026] 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.

[0027] Figure 1 This is a front view of a malleable bone graft bed according to an embodiment of the present invention.

[0028] Figure 2 This is a rear view of a malleable bone graft bed according to an embodiment of the present invention.

[0029] Figure 3 This is another front view of the malleable bone graft bed according to an embodiment of the present invention.

[0030] Figure 4 This is a side view of a malleable bone graft bed according to an embodiment of the present invention.

[0031] Figure label:

[0032] The plastic bone graft bed 100 has a main body 10, a middle crease 11, an edge crease 12, a through hole 13, a polygonal hole 14, a notch 15, and a flat plate area 16. Detailed Implementation

[0033] 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.

[0034] like Figures 1-3As shown, the malleable bone graft bed 100 according to an embodiment of the present invention includes a main body 10 and anchors (not shown). The main body 10 is formed by processing titanium alloy material. A central crease 11 is provided on the back of the main body 10, and two side creases 12 are provided on the front of the main body 10. The central crease 11 and the two side creases 12 located on both sides of the central crease 11 divide the main body 10 into four regions.

[0035] The two ends of the middle crease are designed with slits, and the two sides of the slits of the main body 10 can be connected to the patient's spine by anchors.

[0036] It should be noted that the anchor in this invention is a professional medical device. The front end of the anchor is a hook structure. The hook can pass through the two sides of the slit in the main body 10 and the patient's spine to fix the malleable bone graft bed 100 to the patient's spine.

[0037] Preferably, in this invention, the end of the hook is connected to a suture thread, and the hook can pass through the two sides of the suture opening of the main body 10 and the patient's spine. Thus, the suture thread passes through the two sides of the suture opening of the main body 10 and the patient's spine under the drive of the hook, so as to fix the malleable bone graft bed 100 to the patient's spine.

[0038] It is understood that when using the plastic bone graft bed 100 of the present invention, it is necessary to bend the plastic bone graft bed 100 along the opening direction of the middle fold 11 and the side fold 12 so that the middle position of the plastic bone graft bed 100 forms a "peak" and the two sides of the plastic bone graft bed 100 form a "flat ground".

[0039] Each area is provided with multiple through holes 13 arranged in a row, and every four through holes 13 form a polygonal hole 14. The four corners of the main body 10 are located below the nail heads of the screws in the nail bar system.

[0040] It should be noted that the main body 10 has a mesh structure, and the through hole 13 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 plastic bone graft bed 100 when the transplanted bone is embedded.

[0041] Preferably, the anchor can pass through the through hole 13.

[0042] The malleable bone graft bed 100 in this invention is made of medical titanium alloy. Medical titanium alloy has high strength, mechanical properties close to those of human bone, strength far superior to pure titanium, and also features fatigue resistance, corrosion resistance, strong malleability and excellent biocompatibility.

[0043] In some embodiments, there are two anchors, which connect the two ends of the main body 10 to the patient's spine.

[0044] In some embodiments, such as Figure 3 As shown, notches 15 can be cut out at the four corners of the main body 10, and the edge of the notch 15 can be set below the screw head.

[0045] Understandably, the screw has a stud, and the notch 15 effectively prevents the body 10 from contacting and squeezing with the stud, which helps to improve the overall stability of the body 10.

[0046] In some embodiments, in the width direction of the body 10, the central crease 11 and the two side creases 12 located on both sides of the central crease 11 divide the width of the body 10 into four equal parts.

[0047] In some embodiments, the thickness of the body 10 is between 1.0 and 1.5 mm, and the depth of the middle crease 11 and the edge crease 12 is between 0.1 and 0.3 mm.

[0048] In some embodiments, the upper surface of the main body 10 is provided with a composite coating containing hydroxyapatite.

[0049] In some embodiments, the composite coating further includes calcium carbonate powder.

[0050] In some embodiments, the composite coating powder is laser cladding sprayed onto the surface of the titanium alloy substrate of the body 10, and the titanium alloy substrate of the body 10 is subjected to polarization treatment.

[0051] 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 to 1200w and a scanning speed of 3.8 to 11.2 mm / s, and argon is used as the protective gas.

[0052] 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.

[0053] Preferably, the alkaline solution is a 1 mol / L NaOH solution.

[0054] In some embodiments, a bone particle placement layer is provided on the composite coating.

[0055] 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.

[0056] In some embodiments, each region is surrounded by a flat plate region 16.

[0057] According to an embodiment of the present invention, a spinal bone grafting surgical method is used in which the above-mentioned malleable bone graft bed is operated on using a spinal bone grafting surgical method, the spinal bone grafting surgical method comprising:

[0058] S10, fixation of the spinal rod system near the patient's spine;

[0059] S20, the patient's laminectomy was performed;

[0060] S30, the plastic bone graft bed is placed at the laminectomy site of the patient. The two sides of the opening of the plastic bone graft bed are placed on both sides of the patient's spine, and the plastic bone graft bed is connected to the patient's spine by anchors.

[0061] In some embodiments, the spinal bone grafting surgical method further includes:

[0062] S40, with medical bone particles spread on the surface of the spinal titanium alloy bone graft bed.

[0063] In some embodiments, the method further includes the following after step S30:

[0064] S31, the four corners of the malleable bone graft bed are cut to create four notches, the edges of which can be positioned below the screw heads in the spinal rod system.

[0065] In this invention, spinal internal fixation surgery typically includes three main steps: first, fixation of the spinal rod system; second, laminectomy; and third, bone grafting.

[0066] In this invention, the spinal bone grafting surgical method mainly includes the specific details of the bone grafting steps.

[0067] Compared to previous surgical procedures, this invention proposes a placement method for a malleable bone graft bed. This malleable bone graft bed can be placed at the site of the vertebral laminar defect, and the suture opening of the bed is connected to the patient's spine via anchors. Then, medical bone particles are spread throughout the graft bed to complete the bone grafting process.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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 malleable bone graft bed, characterized in that, include: The main body has a central crease on its back and two side creases on its front. The central crease and the two side creases located on either side of the central crease divide the main body into four areas. Each of the aforementioned areas is provided with multiple through holes arranged in an array, and every four of the aforementioned through holes form a polygonal hole, with the four corners of the main body located below the screw heads in the nail bar system; The anchor pin has slits at both ends of the middle fold, which allows the two sides of the slit in the main body to be connected to the patient's spine. There are two anchors, which connect the two ends of the main body to the patient's spine.

2. The malleable bone graft bed according to claim 1, characterized in that, Notches can be cut out at the four corners of the main body, and the edges of the notches can be positioned below the screw head.

3. The malleable bone graft bed according to claim 2, characterized in that, In the width direction of the main body, the central crease and the two side creases located on both sides of the central crease divide the width of the main body into four equal parts. The thickness of the main body is between 1.0 and 1.5 mm, and the depth of the central crease and the side creases is between 0.1 and 0.3 mm.

4. The malleable bone graft bed according to claim 3, 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.

5. The malleable bone graft bed according to claim 4, 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.

6. The malleable bone graft bed according to claim 5, characterized in that, The composite coating has a bone particle placement layer, and each region is surrounded by a flat plate area.

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