Cartilage repair implant

Abstract

The application relates to a cartilage repair implant, belonging to the field of cartilage repair technology, which comprises an implant body and a deployment assembly, the implant body is used for penetrating through cartilage to be repaired and embedding into bone tissue, the deployment assembly is arranged on the side wall of one end of the implant body close to the bone tissue, and the deployment assembly is used for abutting against the bone tissue. The application has the effects of improving the stability of the implant body on the cartilage, guaranteeing the repair of the cartilage and improving the problem that an artificial synthetic material is easy to be taken out after being installed on the cartilage.

Description

Technical Field

[0001] This application relates to the field of cartilage repair technology, and in particular to a cartilage repair implant. Background Technology

[0002] The surfaces of the bones connected in a joint are covered with a layer of articular cartilage. The surface of the articular cartilage facing the joint cavity is very smooth, facilitating movement between the bones. The cartilage itself is elastic, thus cushioning the vibrations and impacts of walking, jumping, and other activities. Cartilage damage is a common sports injury. Damage to the articular cartilage can severely affect a patient's mobility and cause pain, greatly impacting their quality of life. Therefore, the repair of articular cartilage is extremely important.

[0003] Currently, the most common method for repairing articular cartilage is cartilage transplantation, including autologous cartilage transplantation, allogeneic cartilage transplantation, and synthetic cartilage transplantation. Autologous and allogeneic cartilage transplantation require the extraction and cultivation of chondrocytes, which are expensive and time-consuming. Therefore, synthetic cartilage transplantation is increasingly widely used in articular cartilage repair due to its advantages of mass production and widespread application.

[0004] When synthetic materials are transplanted to damaged cartilage, a hole needs to be made in the damaged area. After cleaning the damaged area, the synthetic material is then inserted into the hole. The manhole promotes rapid growth and repair of cartilage tissue, thus achieving cartilage repair. However, in the initial stage after placing the synthetic material into the damaged cartilage, before the cartilage tissue has grown onto it, the synthetic material has poor stability within the cartilage and is prone to dislodging during patient movement, affecting cartilage repair. Utility Model Content

[0005] To address the issue of synthetic materials easily detaching after being implanted onto cartilage, this application provides a cartilage repair implant.

[0006] The cartilage repair implant provided in this application adopts the following technical solution:

[0007] A cartilage repair implant includes an implant body and a deployment assembly. The implant body is used to pass through the cartilage to be repaired and embed into bone tissue. The deployment assembly is disposed on the sidewall of the implant body near the bone tissue and is used to press against the bone tissue.

[0008] By adopting the above technical solution, medical staff first make an opening in the damaged cartilage site to be repaired, and then make an opening in the bone tissue behind the damaged cartilage site. The implant is then passed through the cartilage to be repaired and embedded in the bone tissue. The components are then unfolded and pressed against the bone tissue to position the implant on the bone tissue, thereby positioning the implant on the cartilage. This improves the stability of the implant on the cartilage, ensures the repair of the cartilage, and improves the problem of easy dislodgement of synthetic materials after they are installed on the cartilage.

[0009] Optionally, the deployment assembly includes a support block and an elastic element. A limiting groove is formed on the side wall of the implant near the bone tissue. The support block is slidably disposed in the limiting groove. The elastic element is disposed on the inner wall of the limiting groove and is used to drive the support block to slide out of the limiting groove.

[0010] By adopting the above technical solution, during the process of placing the implant into the cartilage and bone tissue, medical staff drive the support block to slide into the limiting groove. After the implant is placed in the set position, the elastic element drives the support block to slide out of the limiting groove, and the support block can then be pressed against the bone tissue. The limiting groove facilitates the placement of the support block during the placement process, making it easier for medical staff to place the implant into the cartilage and bone tissue.

[0011] Optionally, the elastic element includes a magnesium alloy strip, which is disposed on the bottom wall of the limiting groove and connected to the support block. The magnesium alloy strip always has a tendency to drive the support block to move away from the implant.

[0012] By adopting the above technical solution, the magnesium alloy's active chemical properties, good biocompatibility, and good elasticity enable it to push the support block away from the implant and abut against the bone tissue. Furthermore, the magnesium alloy can degrade in the human body, eliminating the need for subsequent surgical removal and reducing the risk of rejection of the elastic component in the patient's body.

[0013] Optionally, the support block is provided with a guide surface for abutting against the cartilage and bone tissue when the implant enters the cartilage and bone tissue, thereby driving the support block to slide into the limiting groove.

[0014] By adopting the above technical solution, during the process of the implant entering the cartilage and bone tissue, the guide surface abuts against the cartilage and bone tissue, driving the support block to slide into the limiting groove. This eliminates the need for medical staff to manually drive the support block into the limiting groove during the implant installation process, thus improving the convenience of implant installation for medical staff.

[0015] Optionally, both the implant and the support are made of biodegradable materials.

[0016] By adopting the above technical solution, the implant and support block can degrade in the patient's body after entering the body, without needing to be removed again, which facilitates the repair of the patient's cartilage.

[0017] Optionally, the implant has multiple holes at one end near the cartilage.

[0018] By adopting the above technical solution, multiple pores facilitate the growth and vascularization of chondrocytes, thereby promoting the rapid ingrowth of cartilage tissue into and fixing the implant, significantly accelerating the growth and repair process of cartilage tissue.

[0019] Optionally, the cross-sectional dimension of the implant is larger than the opening size on the cartilage.

[0020] By adopting the above technical solution, implants with larger cross-sectional dimensions can be embedded in the cartilage and have a tendency to expand, thus being stably positioned on the cartilage and improving the stability of the implant on the cartilage.

[0021] Optionally, the implant is cylindrical in shape.

[0022] By adopting the above technical solution, the cylindrical implant allows medical staff to place the implant into the cartilage and bone tissue from different angles, improving the convenience of implant placement for medical staff.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Deploy the component and press it against the bone tissue to position the implant on the bone tissue, and then position the implant on the cartilage. This improves the stability of the implant on the cartilage, ensures the repair of the cartilage, and improves the problem of easy dislodgement of synthetic materials after they are installed on the cartilage.

[0025] 2. During the process of the implant entering the cartilage and bone tissue, the guide surface abuts against the cartilage and bone tissue, driving the support block to slide into the limiting groove. This eliminates the need for medical staff to manually drive the support block into the limiting groove during the implant installation process, thus improving the convenience of implant installation for medical staff.

[0026] 3. Multiple pores facilitate the growth and vascularization of chondrocytes, thereby promoting rapid ingrowth of cartilage tissue into and fixing the implant, significantly accelerating the growth and repair process of cartilage tissue. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the cartilage repair implant according to an embodiment of this application.

[0028] Figure 2 This is a cross-sectional structural diagram of an embodiment of this application.

[0029] Reference numerals: 1. Implant; 11. Limiting groove; 2. Deployment assembly; 21. Support block; 22. Elastic element; 3. Guide surface; 4. Hole. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0031] This application discloses a cartilage repair implant.

[0032] Reference Figure 1 The cartilage repair implant includes an implant 1 and an unfolding component 2. The implant 1 is used to pass through the cartilage to be repaired and embed into the bone tissue behind the cartilage. The implant 1 is made of biodegradable material. In this embodiment, the implant 1 is made of natural inorganic calcium carbonate, which can be decomposed into calcium ions in the cartilage and absorbed by the human body to assist in the repair of cartilage tissue. It also has good biocompatibility and reduces the possibility of rejection in the patient's body.

[0033] Reference Figure 1 The implant 1 is cylindrical in shape, and all the corners of the implant 1 are chamfered. This allows medical staff to insert the implant 1 into the cartilage and bone tissue without adjusting the angle of the implant 1. They can simply align it with the opening in the cartilage and bone tissue and insert it directly, thus improving the convenience for medical staff to install the implant 1 into the patient's body.

[0034] Reference Figure 1 , Figure 2 The implant 1 has multiple openings 4 on the side near the cartilage, and the diameter of the cross-section of the implant 1 is larger than the size of the openings on the cartilage. The multiple openings 4 allow chondrocytes to quickly extend into the implant 1, grow rapidly and vascularize within it, and simultaneously fix the implant 1 to the cartilage, significantly accelerating the growth and repair process of cartilage tissue. Furthermore, the multiple openings 4 also provide deformation space for the side of the implant 1 near the cartilage. When medical personnel install the implant 1 onto the cartilage, they first press the implant 1 to tighten it. After the implant 1 enters the cartilage, it can open and abut against the cartilage, further improving the stability of the implant 1 on the cartilage.

[0035] Reference Figure 1 , Figure 2 The unfolding component 2 is circumferentially spaced on the side wall of the implant 1 near the bone tissue. The unfolding component 2 is used to press against the bone tissue. The unfolding component 2 includes a support block 21 and an elastic element 22. The side wall of the implant 1 near the bone tissue is provided with multiple limiting grooves 11 circumferentially spaced. The support block 21 slides on the inner wall of the limiting groove 11. The support block 21 is made of biodegradable material. In this embodiment, the support block 21 is also made of natural inorganic calcium carbonate, which can assist in the repair of cartilage tissue and reduce the possibility of rejection reaction in the patient's body.

[0036] Reference Figure 1 , Figure 2The support block 21 has a hole 4 on one side away from the implant 1 and a guide surface 3 on the other side that gradually approaches the implant 1 from the direction away from the implant 1. When the implant 1 enters the cartilage and bone tissue, the guide surface 3 abuts against the cartilage and bone tissue and drives the support block 21 to slide into the limiting groove 11. The limiting groove 11 stores the support block 21 during the insertion process, which makes it easier for medical staff to put the implant 1 into the cartilage and bone tissue and eliminates the need for medical staff to manually drive the support block 21 to slide into the limiting groove 11 during the installation of the implant 1, thus improving the convenience of medical staff in installing the implant 1.

[0037] Reference Figure 1 , Figure 2 The elastic element 22 is installed on the inner wall of the limiting groove 11. The elastic element 22 is used to drive the support block 21 to slide out of the limiting groove 11. The elastic element 22 includes a magnesium alloy strip. The magnesium alloy strip is bent and installed on the bottom wall of the limiting groove 11. The magnesium alloy strip is connected to the end of the support block 21 near the implant 1. The magnesium alloy strip always has the tendency to recover its deformation and drive the support block 21 to move away from the implant 1.

[0038] After the medical staff installs the implant 1 into the cartilage and bone tissue, the magnesium alloy strip pushes the support block 21 to move away from the bottom wall of the limiting groove 11. The support block 21 presses against the bone tissue, and the implant 1 is positioned on the bone tissue through the tightening action, thereby positioning the implant 1 on the cartilage, improving the stability of the implant 1 on the cartilage. Furthermore, due to the chemically active, biocompatible, and elastic properties of magnesium alloy, the magnesium alloy can be degraded in the human body without the need for subsequent surgical removal, and the risk of rejection of the elastic component 22 in the patient's body is reduced.

[0039] The implementation principle of a cartilage repair implant in this application embodiment is as follows: Medical personnel make an opening at the site of cartilage damage to be repaired, remove the damaged area of ​​the cartilage, and make an opening in the bone tissue behind the damaged area of ​​the cartilage. Then, after pressing and tightening the implant 1, the implant 1 is moved through the cartilage and the posterior bone tissue. During the insertion process, the cartilage and bone tissue compress the guide surface 3 of the support block 21, causing the support block 21 to be housed in the limiting groove 11. After the implant 1 is placed in the set position, the elastic element 22 drives the support block 21 away from the implant 1. The implant 1 is moved and pressed against the bone tissue, positioning it on the bone tissue. Simultaneously, the implant 1 opens and presses against the cartilage, further positioning it on the cartilage and improving its stability. This ensures cartilage repair and addresses the issue of synthetic materials easily detaching after being installed on the cartilage. Subsequently, the multiple pores 4 on the implant 1 allow for rapid growth and vascularization of chondrocytes, significantly accelerating the cartilage tissue growth and repair process. Furthermore, the implant 1, support block 21, and elastic element 22 can all gradually decrease in size as the cartilage repairs.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cartilage repair implant, characterized in that: The device includes an implant (1) and a deployment assembly (2), the implant (1) being used to pass through the cartilage to be repaired and embed into the bone tissue, and the deployment assembly (2) being disposed on the side wall of the implant (1) near the bone tissue, the deployment assembly (2) being used to press against the bone tissue.

2. The cartilage repair implant according to claim 1, characterized in that: The unfolding component (2) includes a support block (21) and an elastic element (22). A limiting groove (11) is provided on the side wall of the implant (1) near the bone tissue. The support block (21) is slidably disposed in the limiting groove (11). The elastic element (22) is disposed on the inner wall of the limiting groove (11) and is used to drive the support block (21) to slide out of the limiting groove (11).

3. The cartilage repair implant according to claim 2, characterized in that: The elastic element (22) includes a magnesium alloy strip, which is disposed on the bottom wall of the limiting groove (11) and connected to the support block (21). The magnesium alloy strip always has the tendency to drive the support block (21) to move away from the implant (1).

4. The cartilage repair implant according to claim 2, characterized in that: The support block (21) is provided with a guide surface (3) for abutting against the cartilage and bone tissue when the implant (1) enters the cartilage and bone tissue, thereby driving the support block (21) to slide into the limiting groove (11).

5. The cartilage repair implant according to claim 2, characterized in that: Both the implant (1) and the support block (21) are biodegradable materials.

6. The cartilage repair implant according to claim 1, characterized in that: The implant (1) has multiple holes (4) at one end near the cartilage.

7. A cartilage repair implant according to claim 6, characterized in that: The cross-sectional dimension of the implant (1) is larger than the opening size on the cartilage.

8. The cartilage repair implant according to claim 1, characterized in that: The implant (1) is cylindrical in shape.

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