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Device, kit and method for repairing and fixing articular cartilage

A technology of articular cartilage and a kit, which is applied in the medical field, can solve problems that need to be improved, and achieve the effects of easy cutting and molding, stable long-term biological fixation, and strong operability

Pending Publication Date: 2021-05-28
SHANGHAI SIXTH PEOPLES HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, costal cartilage is suitable for repairing and fixing articular cartilage, such as fragmented or stripped articular surface osteochondral bone fragments, autologous transplantation to repair osteochondral columns, etc., but there is no cutting costal cartilage into cartilage sticks or cartilage needles Related reports on fragmentation or stripping of articular surface osteochondral bone fragments, autograft repair of osteochondral columns, etc.
In addition, the device that assists cartilage bone rod fixation also needs to be improved

Method used

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  • Device, kit and method for repairing and fixing articular cartilage
  • Device, kit and method for repairing and fixing articular cartilage
  • Device, kit and method for repairing and fixing articular cartilage

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Such as Figure 1-5 As shown, the present embodiment provides a device for repairing and fixing articular cartilage, which includes a costal cartilage rod 5, an outer sleeve 1, a drilling part and an auxiliary implant part;

[0051] Such as figure 1 As shown, the bottom end of the outer sleeve 1 is provided with evenly arranged serrations 11 to prevent sliding; the outer sleeve 1 is made of metal;

[0052] Such as figure 2As shown, the drilling part includes a drill sleeve 2 with a length slightly less than or equal to the outer sleeve 1 and a drill bit 3 matching the inner diameter of the drill sleeve; the upper end of the drill sleeve 2 is provided with a first stopper 21, The limiting part 21 is a raised collar structure, which can be integrally formed with the drill sleeve 2 and is made of metal; the length of the drill bit 3 is greater than that of the drill sleeve 2, and the diameter of the drill bit 3 is equal to the inside diameter of;

[0053] Such as Fi...

Embodiment 2

[0056] refer to Image 6 , the present embodiment provides a method for fixing the osteochondral bone block of the stripped articular surface using the device provided in Embodiment 1, comprising the following steps:

[0057] Step 1, apply force to fix the outer sleeve 1 on the articular cartilage to be fixed, insert the drill bit 3 into the drill sleeve 2, then insert the drill sleeve 2 into the outer sleeve 1, and drill holes according to the required depth;

[0058] Step 2, when the drilling is completed, take out the drill sleeve 2, insert the costal cartilage rod 5 covered with the cartilage rod sleeve 4 into the outer sleeve 1, align the costal cartilage rod 5 with the auxiliary propulsor 6, and press the costal cartilage rod 5 with force. The cartilage rod 5 is implanted in the drilled hole;

[0059] Step 3, the device is removed, and the part of the costal cartilage rod 5 on the outside of the articular surface is cut to make it flush with the articular surface.

Embodiment 3

[0061] This embodiment provides a kit for repairing and fixing articular cartilage, which includes the device provided in Embodiment 1 (such as Figure 1-5 ), and also includes parts for fixing and engaging each component in the device and several gradient cartilage sticks, the gradient cartilage sticks are prepared by mixing chitosan and HA.

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Abstract

The invention provides a device, a kit and a method for repairing and fixing articular cartilage. The device comprises a costal cartilage rod, an outer sleeve, a drilling part and an auxiliary implantation part; the drilling part comprises a drilling sleeve and a drill bit matched with the inner diameter of the drilling sleeve; the auxiliary implanting part comprises a cartilage rod sleeve and an auxiliary propelling part, the cartilago costal rod is of a rod-shaped structure which is processed into the cartilago costal and has the diameter of 3-8mm and is smaller than the inner diameter of the cartilago costal rod sleeve, and the cartilago costal rod is derived from autologous, allogeneic or heterogeneic cartilago costal. According to the device, costal cartilage is processed into a cartilage rod, the cartilage rod, the articular cartilage to be fixed and a cancellous bone of a bone bed can form a good biological bonding interface, and the costal cartilage which can be adopted is sufficient, is easy to cut and form and can be produced in a large scale; the surface of the cartilage rod can be shaped with an articular surface through cutting, and has biomechanical characteristics similar to articular cartilage. The method provided by the invention is strong in operability, simple and rapid, and provides a new strategy for the repair treatment of related femoral cartilage injury.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a device, kit and method for repairing and fixing articular cartilage. Background technique [0002] Bone nails are used for internal fixation of fractured parts of the human body, spinal parts, etc., especially for fixing small bone fragments together. The existing patent with the application number EP89305627.5 discloses a bone screw. In order to solve the technical problem that the fragments are easily dislocated after the drill bit is removed, the bone screw is designed to be inserted into the site to be fixed in the form of a bone rod. In addition, it uses Bioabsorbable polymer material. However, during the implementation of the product provided by this patent, its biological histology and mechanical properties are very different from those of articular cartilage, and cannot effectively repair and fix the osteocartilage on the designed articular surface. [0003] Costal c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/16A61F2/30A61F2/46A61L31/04
CPCA61B17/1604A61B17/1615A61F2/30756A61F2/4618A61F2/4644A61L31/041C08L5/08A61L27/26A61L27/3612A61F2002/4627A61F2002/4649A61B17/16A61B2090/033A61B17/1693
Inventor 杜大江张长青
Owner SHANGHAI SIXTH PEOPLES HOSPITAL
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