CN210811769U - Articular cartilage repair support forming device - Google Patents
Articular cartilage repair support forming device Download PDFInfo
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- CN210811769U CN210811769U CN201921140478.9U CN201921140478U CN210811769U CN 210811769 U CN210811769 U CN 210811769U CN 201921140478 U CN201921140478 U CN 201921140478U CN 210811769 U CN210811769 U CN 210811769U
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Abstract
The utility model relates to an articular cartilage repair support forming device, the device include cutter and push rod, wherein: the cutter is a hollow cylinder, the shape of the cross section of the cutter is the same as that of the damaged cross section of the articular cartilage, the size of the cross section of the cutter is 2-5% of the whole enlarged cross section of the damaged cross section of the articular cartilage, the height of the cutter is 10-20 times of the damaged depth of the articular cartilage, the wall thickness of the cutter is 1-2mm, and the bottom end of the cutter is provided with a cutting edge; the cross section of the push rod has the same shape as that of the damaged articular cartilage, the size of the cross section of the push rod is 2-5% smaller than that of the damaged articular cartilage, and the height of the push rod is 1.1-1.2 times of that of the cutter. The utility model has the advantages that: the structural shape of the cut repair bracket can be perfectly matched with the anatomical structure of the cartilage injury part, so that the preparation of the personalized implant is realized; the dressing of the cartilage wound surface is reduced to the greatest extent, the cartilage loss is reduced, the operation is simplified, and the repair effect is improved.
Description
Technical Field
The utility model relates to the field of medical equipment, particularly, relate to an articular cartilage repair support forming device.
Background
The articular cartilage of a human body is a non-vascular tissue without blood supply, and nutrition comes from moistening of peripheral joint synovial fluid, and the articular cartilage is difficult to regenerate once being damaged, so that cartilage repair becomes one of the most challenging clinical problems for orthopedists. If cartilage damage is not treated properly in a timely manner, artificial joint replacement is often performed last.
After decades of development, articular surface cartilage repair techniques have gone through several ages. From the initial bone marrow stimulation techniques to the chondrocyte transplantation techniques, and then the emergence of vectors capable of seeding patients with chondrocytes in advance, the development has progressed to the fourth generation cartilage repair techniques. That is, after the collagen carrier (or "plug" or "carrier") without cells is implanted into the cartilage defect, the free cells in the joint of the patient will also migrate into the carrier to form the "cartilage surface" with chondrocytes. Thus, the operation of taking the cells of the patient is avoided, the long cell culture and amplification process is cancelled, and the cost is reduced.
Articular cartilage is damaged in various ways, and the wound surface is extremely irregular. The repair bracket is a product which is artificially processed, and the specification and the shape of the repair bracket are customized. In order to adapt the limited types of repair supports to the diversified cartilage injury wound surfaces, the shapes of the cartilage injury wound surfaces are required to be modified in a large range so as to be regular, so that the bone mass loss of the cartilage injury wound surfaces is caused, and the injury wound surfaces are enlarged. After the wound surface is finished, a repair bracket matched with the wound surface needs to be cut according to the size of the wound surface. However, the manual cutting method has a large relationship with the experience, manipulation, tolerance and the like of doctors, so that the size of the obtained stent has an error with the size of the wound surface, the stent is difficult to implant in place, and the final healing effect is seriously influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, an object of the present invention is to provide an articular cartilage repair support forming device, which can perfectly fit the articular cartilage repair support obtained by cutting with the shape of the cartilage wound.
The utility model provides an articular cartilage repair support forming device, the device include cutter and push rod, wherein:
the cutting tool is a hollow cylinder, the shape of the cross section of the cutting tool is the same as that of the damaged cross section of the articular cartilage, the size of the cross section of the cutting tool is 2-5% of the whole enlarged cross section of the damaged cross section of the articular cartilage, the height of the cutting tool is 10-20 times of the damaged depth of the articular cartilage, the wall thickness of the cutting tool is 1-2mm, and the bottom end of the cutting tool is provided with a cutting edge;
the shape of the cross section of the push rod is the same as that of the damaged cross section of the articular cartilage, the size of the cross section of the push rod is 2-5% of the whole reduced cross section of the damaged cross section of the articular cartilage, and the height of the push rod is 1.1-1.2 times of that of the cutter.
As a further improvement of the present invention, the top of the cutter is provided with a cutter lug, and the cutter lug are of an integral structure.
As a further improvement of the utility model, the top of push rod is equipped with the push rod lug, the push rod with push rod lug formula structure as an organic whole.
As a further improvement of the utility model, the cutting edge is a single-side outer bevel edge sharpening device, and the outer bevel angle of the cutting edge is 5-45 degrees.
As a further improvement of the utility model, the wall thickness of the cutter does not occupy the inner space of the cavity body therein.
As a further development of the invention, the height of the knife does not include the height of the knife lug.
As a further improvement of the present invention, the height of the push rod does not include the height of the push rod lug.
As a further improvement, the push rod is a solid cylinder, and the edge of the bottom of the push rod is provided with a chamfer.
As a further improvement of the utility model, the cutter with the material of push rod is one or more in metal, pottery and the organic polymer material.
As a further improvement of the utility model, the organic polymer material is polyethylene, polypropylene, polycarbonate, polyester or polyamide.
The utility model has the advantages that: the structural shape of the repair bracket cut by the articular cartilage repair bracket forming device of the utility model can be perfectly matched with the anatomical structure of the cartilage injury part, thereby realizing the preparation of the personalized implant; meanwhile, the dressing of the cartilage wound surface is reduced to the greatest extent, the cartilage loss is reduced, the operation is simplified, and the repair effect is improved.
Drawings
Fig. 1 is a schematic structural view of a cutter in an articular cartilage repair scaffold forming device according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a cutting tool in the device for forming an articular cartilage repair scaffold according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a push rod in the device for forming an articular cartilage repair scaffold according to an embodiment of the present invention.
In the figure, the position of the upper end of the main shaft,
11. cross section of the tool; 12. a cutter lug; 13. a blade; 21. cross section of the push rod; 22. a push rod lug; 23. the bottom of the push rod.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 1-3, the embodiment of the present invention provides an articular cartilage repair scaffold forming device, which comprises a cutter 1 and a push rod 2, wherein:
the cutter 1 is a hollow cylinder, the shape of the cross section 11 of the cutter is the same as that of the damaged cross section of the articular cartilage, the size of the cross section 11 of the cutter is 2-5% of the whole enlarged cross section of the damaged cross section of the articular cartilage, the height of the cutter 1 is 10-20 times of the damaged depth of the articular cartilage, the wall thickness of the cutter 1 is 1-2mm, and the bottom end of the cutter 1 is provided with a cutting edge 13;
the shape of the cross section 21 of the push rod is the same as that of the damaged cross section of the articular cartilage, the size of the cross section 21 of the push rod is 2-5% of the whole reduced cross section of the damaged cross section of the articular cartilage, and the height of the push rod 2 is 1.1-1.2 times of that of the cutter 1.
Since the cartilage repair scaffold has good elasticity, in order to make the articular cartilage repair scaffold closely fit to the lesion, the size of the cartilage repair scaffold should be appropriately set to be slightly larger than that of the articular cartilage lesion. In this example, the cross section of the articular cartilage damage 3D model is enlarged by 3% as a whole as the size of the tool cross section 11. The height of the articular cartilage damage 3D model is generally 3mm, and the height of the cutter 1 is set to be 15 times of the height of the articular cartilage damage 3D model from the viewpoint of convenient holding. In order to facilitate the push rod 2 to push the cut articular cartilage repair bracket out of the hollow cavity of the cutter, the cross section 21 of the push rod should be smaller than that of the hollow cavity of the cutter, and the height of the push rod 2 should be larger than the depth of the hollow cavity of the cutter 1. In this example, the cross section of the articular cartilage damage 3D model is reduced by 3% as a whole to obtain the size of the pusher cross section 21, and 1.1 times the height of the cutter 1 is used as the height of the pusher 2.
Further, a cutter lug 12 is arranged at the top of the cutter 1, and the cutter 1 and the cutter lug 12 are of an integrated structure.
Further, a push rod lug 22 is arranged at the top of the push rod 2, and the push rod 2 and the push rod lug 22 are of an integrated structure.
Further, the cutting edge 13 is arranged for single-side outer bevel edge sharpening, and the outer bevel angle of the cutting edge 13 is 5-45 degrees.
For the purpose of facilitating gripping, a cutter lug 12 and a pusher lug 22 are provided on the upper part of the cutter 1 and the pusher 2, respectively. In the 3D printing forming process of the cutter 1 and the push rod 2, the cutter lug 12 and the push rod lug 22 are respectively used as temporary supporting structures, and then the 3D printing forming of the cutter 1 and the push rod 2 is achieved, so that the cutter 1, the cutter lug 12, the push rod 2 and the push rod lug 22 form an integrated structure.
Further, the wall thickness of the tool 1 does not occupy the inner space of the cavity body therein.
Further, the height of the knife 1 does not include the height of the knife lug 12.
Further, the height of the push rod 2 does not include the height of the push rod lug 22.
Further, the push rod 2 is a solid cylinder, and the edge of the push rod bottom 23 is provided with a chamfer. In order to avoid the push rod 2 from scratching the repair stent in the process of pushing out the cut articular cartilage damage repair stent, in the embodiment, all edges with edges of the push rod bottom 23 are chamfered, so that the edges are smoother.
Further, the material of the cutter 1 and the push rod 2 is one or more of metal, ceramic and organic polymer material.
Further, the organic polymer material is polyethylene, polypropylene, polycarbonate, polyester or polyamide. In this embodiment, the material used for the cutter 1 and the push rod 2 is an organic polymer material, and the selected 3D printing technology is SLA printing for printing and molding.
The specific use method of the articular cartilage repair scaffold forming device for cutting the articular cartilage repair scaffold comprises the following steps: the method comprises the steps of flatly placing materials for preparing the articular cartilage repair support on a cutting table, selecting a proper position, vertically pressing a cutter 1 into the materials of the articular cartilage repair support, continuously and slowly pressing the cutter, lifting the cutter 1 after the articular cartilage repair support is cut to the bottom, and embedding the cut articular cartilage repair support into the hollow cavity of the cutter 1. And (3) inserting the push rod 2 into the hollow cavity of the cutter 1 from the top end of the cutter 1, and pushing the cut articular cartilage repair support out of the inner cavity of the cutter 1 to obtain the articular cartilage repair support completely consistent with the section shape of the focus. The cut articular cartilage repair bracket is completely matched with the defect part of the patient, the whole operation is perfect, the wound is small, the time is short, the bleeding amount is small, the probability of infection is reduced, and the satisfaction degree of the patient is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an articular cartilage repair support forming device which characterized in that, includes cutter (1) and push rod (2), wherein:
the cutting tool (1) is a hollow cylinder, the shape of the cross section (11) of the cutting tool is the same as that of the damaged cross section of the articular cartilage, the size of the cross section (11) of the cutting tool is 2-5% of the whole enlarged cross section of the damaged cross section of the articular cartilage, the height of the cutting tool (1) is 10-20 times of the damaged depth of the articular cartilage, the wall thickness of the cutting tool (1) is 1-2mm, and the bottom end of the cutting tool (1) is provided with a cutting edge (13);
the shape of the cross section (21) of the push rod is the same as that of the damaged cross section of the articular cartilage, the size of the cross section (21) of the push rod is 2-5% of the whole reduced cross section of the damaged cross section of the articular cartilage, and the height of the push rod (2) is 1.1-1.2 times of that of the cutter (1).
2. The articular cartilage repair scaffold forming device according to claim 1, wherein the top of the cutter (1) is provided with a cutter lug (12), and the cutter (1) and the cutter lug (12) are of an integrated structure.
3. The articular cartilage repair scaffold molding device according to claim 1, wherein the top of the push rod (2) is provided with a push rod lug (22), and the push rod (2) and the push rod lug (22) are of an integrated structure.
4. The articular cartilage repair scaffold forming device according to claim 1, wherein the cutting edge (13) is a single-sided outer beveled edge forming device, and the outer bevel angle of the cutting edge (13) is 5-45 °.
5. The device for forming an articular cartilage repair scaffold according to claim 1, wherein the wall thickness of the cutter (1) does not occupy the inner space of the hollow body therein.
6. The device according to claim 2, wherein the height of the cutter (1) does not include the height of the cutter lug (12).
7. The device of claim 3, wherein the height of the push rod (2) does not include the height of the push rod lug (22).
8. The articular cartilage repair scaffold forming device according to claim 1, wherein the push rod (2) is a solid cylinder, and the edge of the push rod bottom (23) is provided with a chamfer.
9. The articular cartilage repair scaffold forming device according to claim 1, wherein the cutter (1) and the push rod (2) are made of one or more of metal, ceramic and organic polymer material.
10. The device for forming an articular cartilage repair scaffold according to claim 9, wherein the organic polymer material is polyethylene, polypropylene, polycarbonate, polyester or polyamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921140478.9U CN210811769U (en) | 2019-07-19 | 2019-07-19 | Articular cartilage repair support forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921140478.9U CN210811769U (en) | 2019-07-19 | 2019-07-19 | Articular cartilage repair support forming device |
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| CN210811769U true CN210811769U (en) | 2020-06-23 |
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| CN201921140478.9U Active CN210811769U (en) | 2019-07-19 | 2019-07-19 | Articular cartilage repair support forming device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112060174A (en) * | 2020-09-01 | 2020-12-11 | 崔展 | Processing equipment of engineering scaffold for human articular cartilage tissue |
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2019
- 2019-07-19 CN CN201921140478.9U patent/CN210811769U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112060174A (en) * | 2020-09-01 | 2020-12-11 | 崔展 | Processing equipment of engineering scaffold for human articular cartilage tissue |
| CN112060174B (en) * | 2020-09-01 | 2022-01-18 | 周荣兴 | Processing equipment of engineering scaffold for human articular cartilage tissue |
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