Plastic bone grafting bed and spine bone grafting operation method

Abstract

The invention discloses a plastic bone grafting bed and a spine bone grafting operation method.The plastic bone grafting bed comprises a main body and anchors, the main body is formed by a titanium alloy material, the back face of the main body is provided with a middle crease, and the front face of the main body is provided with two side creases; the main body is divided into four areas by the middle crease and the two side creases positioned on the two sides of the middle crease; a plurality of areas are formed in the main body, a plurality of through holes distributed in a display mode are formed in each area, a polygonal hole is defined by every four through holes, the four corners of the main body are arranged below screw caps of screws in the screw-rod system, the two ends of a middle crease are designed to be slotted, and the two sides of the slotted position of the main body can be connected with the spine of a patient in series through anchors. According to the plastic bone grafting bed, the main body and the spine of a patient are connected in series through the anchor nails, so that the stability of the plastic bone grafting bed is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a plastic bone grafting bed and a spinal bone grafting surgical method. Background Art

[0002] Posterior spinal laminectomy and spinal decompression surgery is the most commonly used surgical method for treating spinal diseases such as spinal stenosis, spinal fractures, herniated discs, bone hyperplasia, intraspinal tumors and masses, and severe spinal deformities. The purpose is to relieve or alleviate the compression of the dura mater, spinal cord, or nerve roots caused by the shortening and volume loss of the spinal canal and lateral recess caused by the various reasons mentioned above. More than half of spinal surgeries will use laminectomy and spinal decompression as a surgical method to varying degrees. After laminectomy and spinal decompression, internal fixation and bone grafting are generally required with a screw-rod system. Internal fixation is to provide immediate stability of the spine, while bone grafting can permanently ensure spinal stability.

[0003] Currently, bone grafts that can be used to repair bone defects after spinal laminectomy and spinal canal decompression 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 easily 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 the present invention is to provide a plastic bone graft bed and a spinal bone grafting surgical method to solve the problems caused by the existing screw fixation method.

[0005] To this end, one embodiment of the present invention provides a plastic bone graft bed.

[0006] To this end, another embodiment of the present invention provides a spinal bone grafting method

[0007] According to an embodiment of the present invention, the plastic bone graft bed includes a main body and an anchor, wherein a middle fold is provided on the back of the main body, and two side folds are provided on the front of the main body. The middle fold and the two side folds located on both sides of the middle fold divide the main body into four areas; each of the areas is provided with a plurality of through holes arranged in an array, and a polygonal hole is formed between every four through holes, and the four corners of the main body are provided under the nail cap of the screw in the nail-rod system; the two ends of the middle fold are designed as slits, and the two side parts of the slit of the main body can be connected in series with the patient's spine through the anchor.

[0008] In some embodiments, there are two anchors, and the two anchors respectively connect the two end openings of the main body and the patient's spine in series.

[0009] In some embodiments, notches may be cut out of the four corners of the main body, and edge portions of the notches may be disposed below the screw cap.

[0010] In some embodiments, in the width direction of the main body, the middle fold and the two side folds located on both sides of the middle fold divide the width of the main body into four equal parts.

[0011] In some embodiments, the thickness of the main body is between 1.0-1.5 mm, and the depths of the middle crease and the side crease are between 0.1-0.3 mm.

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

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

[0014] In some embodiments, the powder of the composite coating is sprayed on the surface of the titanium alloy substrate of the main body by laser cladding, and the titanium alloy substrate of the main body is subjected to an electric polarization treatment.

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

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

[0017] According to the spinal bone grafting surgical method of an embodiment of the present invention, the above-mentioned plastic bone grafting bed is used for spinal bone grafting surgical method, and the spinal bone grafting surgical method includes:

[0018] S10, fix the spinal screw-rod system near the patient's spine;

[0019] S20, the patient underwent laminectomy;

[0020] S30, the plastic bone graft bed is placed at the laminectomy site of the patient, and the two sides of the slit of the plastic bone graft bed are placed on both sides of the patient's spine, and the plastic bone graft bed and the patient's spine are connected in series through anchors.

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

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

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

[0024] S31, cutting the four corners of the plastic bone graft bed to form four notches, wherein the edge portions of the notches can be arranged below the screw caps of the screws in the spinal screw-rod system.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present disclosure. Other features and aspects of the present disclosure will become more apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 4 is a front view of a plastic bone graft bed according to an embodiment of the present invention.

[0028] Figure 2 FIG. 4 is a back view of a plastic bone graft bed according to an embodiment of the present invention.

[0029] Figure 3 4 is another front view of the plastic bone graft bed according to an embodiment of the present invention.

[0030] Figure 4 1 is a side view of a plastic bone graft bed according to an embodiment of the present invention.

[0031] Reference numerals:

[0032] The plastic bone graft bed 100 comprises a main body 10 , a middle fold 11 , side folds 12 , a through hole 13 , a polygonal hole 14 , a notch 15 , and a flat plate area 16 . DETAILED DESCRIPTION

[0033] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. However, it should be understood by those skilled in the art that the embodiments described below are only used to illustrate 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 of ordinary skill in the art without creative work are within the scope of protection of the present invention.

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

[0035] The two ends of the middle fold are designed to be slits, and the two sides of the slit of the main body 10 can be connected in series with the patient's spine through anchor nails.

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

[0037] Preferably, in the present invention, the end of the crochet hook is connected to a suture, and the crochet hook can pass through the two side parts of the slit of the main body 10 and the patient's spine. Thus, the suture is driven by the crochet hook to pass through the two side parts of the slit of the main body 10 and the patient's spine to fix the plastic bone graft bed 100 and the patient's spine together.

[0038] It can be understood that when the plastic bone graft bed 100 of the present invention is in use, 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 "flat ground".

[0039] A plurality of through holes 13 arranged in an array are provided in each area, and a polygonal hole 14 is formed between every four through holes 13. The four corners of the main body 10 are provided below the screw caps of the screws in the nail rod system.

[0040] It should be noted that the main body 10 is a mesh structure, and the through hole 13 is designed as a circular hole with a diameter of 2.5-3 mm, so that the transplanted bone will not cause bone fragments to leak between the dura mater sac and the plastic bone graft bed 100 when being embedded.

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

[0042] The plastic bone graft bed 100 of the present invention is made of medical titanium alloy, which has high strength, mechanical properties close to those of human bones, much better strength than pure titanium, and is also fatigue-resistant, corrosion-resistant, highly plastic, and has excellent biocompatibility.

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

[0044] In some embodiments, as Figure 3 As shown, the four corners of the main body 10 can be cut out to form notches 15, and the edge portion of the notch 15 can be set under the screw cap.

[0045] It is understandable that the screw has a stud, and the notch 15 effectively avoids contact and extrusion between the main body 10 and the stud, which is beneficial to improving the overall stability of the main body 10.

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

[0047] In some embodiments, the thickness of the main body 10 is between 1.0-1.5 mm, and the depths of the middle fold 11 and the side fold 12 are between 0.1-0.3 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 powder of the composite coating is sprayed onto the surface of the titanium alloy substrate of the main body 10 by laser cladding, and the titanium alloy substrate of the main body 10 is subjected to an electric polarization treatment.

[0051] Preferably, laser cladding spraying includes the following steps: first laying a layer of titanium powder on the cleaned titanium alloy substrate, and then laying the mixed powder on the titanium powder, with the total thickness of the sprayed powder being 1 mm; using a laser to perform laser cladding spraying on the laid spraying powder, the laser power is 600w~1200w, the scanning speed is 3.8~11.2mm / s, and argon is used as the protective gas.

[0052] Preferably, the electrode polarization treatment includes the following steps: connecting the sprayed titanium alloy substrate to the anode of a constant current DC power supply and using the titanium sheet as the cathode; placing the titanium alloy substrate and the titanium sheet in an alkaline solution at the same time, and connecting the constant current DC power supply with a loading voltage of 80V, and polarizing for 3 minutes.

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

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

[0055] It is understood that bone grafting is performed on the composite coating. The graft can be autologous bone, allogeneic bone, or artificial morselized bone. The graft is pressed and packed tightly, and the upper and lower vertebral spinous processes connected to the affected vertebra are slightly trimmed to ensure adequate contact with the graft and facilitate bone ingrowth. Furthermore, various bone growth factors can be added to the graft to accelerate bone healing.

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

[0057] According to the spinal bone grafting surgical method of an embodiment of the present invention, the above-mentioned plastic bone grafting bed is used for spinal bone grafting surgical method, and the spinal bone grafting surgical method includes:

[0058] S10, fix the spinal screw-rod system near the patient's spine;

[0059] S20, the patient underwent laminectomy;

[0060] S30, the plastic bone graft bed is placed at the patient's laminectomy site, and the two sides of the slit of the plastic bone graft bed are placed on both sides of the patient's spine. The plastic bone graft bed and the patient's spine are connected in series through anchor screws.

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

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

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

[0064] S31, cutting the four corners of the plastic bone graft bed to form four notches, wherein the edge portions of the notches can be arranged under the screw caps of the screws in the spinal screw-rod system.

[0065] In the present invention, spinal internal fixation surgery generally includes three main steps: first, fixation of the spinal screw-rod system; second, lamina decompression; and third, bone grafting.

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

[0067] Compared to previous surgical procedures, the present invention proposes a new method for placing a plastic bone graft bed. The bed can be placed over the vertebral lamina defect. Anchors are used at the slits of the bed to connect the bed to the patient's spine. The bed is then covered with medical bone granules, completing the bone graft.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0070] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0071] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0072] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0073] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A plastic bone graft bed, characterized in that: include: A main body, wherein a middle fold is provided on the back of the main body, and two side folds are provided on the front of the main body, wherein the middle fold and the two side folds located on both sides of the middle fold divide the main body into four areas; Each of the regions is provided with a plurality of through holes arranged in an array, and a polygonal hole is formed between every four of the through holes, and the four corners of the main body are provided below the screw cap of the screw in the nail-rod system; Anchor nails, both ends of the middle fold are designed as slits, and the two sides of the slit of the main body can be connected in series with the patient's spine through the anchor nails.

2. The plastic bone graft bed according to claim 1, characterized in that: There are two anchors, and the two anchors respectively connect the two end openings of the main body and the patient's spine in series.

3. The plastic 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 edge portions of the notches can be arranged below the screw caps.

4. The plastic bone graft bed according to claim 3, characterized in that: In the width direction of the main body, the middle fold and the two side folds located on both sides of the middle fold divide the width of the main body into four equal parts. The thickness of the main body is between 1.0-1.5mm, and the depths of the middle fold and the side folds are between 0.1-0.3mm.

5. The plastic bone graft bed according to claim 4, characterized in that: The upper surface of the main body is provided with a composite coating containing hydroxyapatite, and the composite coating further comprises calcium carbonate powder.

6. The plastic bone graft bed according to claim 5, characterized in that: The powder of the composite coating is sprayed on the surface of the titanium alloy substrate of the main body by laser cladding, and the titanium alloy substrate of the main body is subjected to an electric polarization treatment.

7. The plastic bone graft bed according to claim 6, characterized in that: A bone particle placement layer is provided on the composite coating, and the surrounding areas of each area are flat plate areas.

8. A spinal bone grafting surgical method, wherein the plastic bone graft bed according to claims 1 to 7 is used for spinal bone grafting surgical method, characterized in that: include: S10, fix the spinal screw-rod system near the patient's spine; S20, the patient underwent laminectomy; S30, the plastic bone graft bed is placed at the laminectomy site of the patient, and the two sides of the slit of the plastic bone graft bed are placed on both sides of the patient's spine, and the plastic bone graft bed and the patient's spine are connected in series through anchors.

9. The spinal bone grafting method according to claim 8, characterized in that: Also includes: S40, spreading medical bone particles on the surface of the spinal titanium alloy bone graft bed.

10. The spinal bone grafting method according to claim 8, characterized in that: After step S30, the method further includes: S31, cutting the four corners of the plastic bone graft bed to form four notches, wherein the edge portions of the notches can be arranged below the screw caps of the screws in the spinal screw-rod system.

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