Artificial ligamentum flavum complex

Abstract

The utility model discloses an artificial ligamentum flavum complex which comprises an artificial ligament and two fixing seats, and the two ends of the artificial ligament are fixedly connected with the two fixing seats respectively. Screw holes are formed in the two fixing seats, the two fixing seats are fixedly connected with the spine by installing screws into the respective screw holes, and the bone contact surfaces at the bottoms of the two fixing seats are provided with micropore structures. When the artificial ligamentum flavum complex is installed on the spine, the artificial ligamentum flavum complex can replace the cut ligamentum flavum to maintain the mechanical stability of the spine and cover the dura mater to reduce postoperative dura mater scars. Therefore, the artificial ligamentum flavum complex can replace ligamentum flavum removed in the operation, improve the stability of the spine of a patient, reduce postoperative spine instability, protect spinal canal duramater and nerves, reduce scar adhesion and improve the postoperative clinical effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of hospital instruments, especially relates to a manual yellow ligament complex. BACKGROUND

[0002] Yellow ligament is an important ligament on the spine, and it is an important anatomical structure in human spine, located between the lamina of each vertebra, and plays a key role in biomechanics and protection: 1, it connects adjacent vertebrae and limits the effect of excessive forward flexion of the spine, provides appropriate support in the dynamic activity of the spine, keeps the spine stable when moving and prevents dislocation. 2, when the spine recovers from the curved position to the upright position, the yellow ligament can quickly recover to its original state, play the role of "rebound", and reduce the burden of spinal muscles. 3, the yellow ligament constitutes the posterior wall part of the spinal canal, protecting the spinal cord and nerve roots in the spinal canal. 4, the yellow ligament can limit the flexion angle of the spine to prevent disc herniation or other spinal injuries caused by excessive bending. 5, the yellow ligament plays an auxiliary supporting role in the overall structure of the spinal canal, participates in the weight bearing and pressure distribution of the spine in static and dynamic states, and helps maintain the physiological curvature and function of the spine when standing and walking.

[0003] With the stimulation of spinal load, the yellow ligament hypertrophies to meet the mechanical requirements of the spine, but this causes spinal stenosis and nerve compression. When the spine is operated, whether it is lumbar disc herniation or spinal stenosis and spondylolisthesis, in the spinal decompression surgery, whether it is open or minimally invasive surgery, the yellow ligament needs to be removed to enter the spinal canal to achieve decompression of the spinal canal and nerve root canal, but the removal of the yellow ligament will destroy the mechanical stability of the spine, leading to spinal instability, low back pain, further degeneration of the spine, disc injury, and serious impact on the quality of life of patients.

[0004] Traditional yellow ligament reconstruction or repair surgery usually uses autologous or allogeneic transplantation to achieve reconstruction or repair, but there are problems such as donor shortage, rejection reaction, and slow postoperative recovery. There is no artificial yellow ligament applied to the human spine. Therefore, it is of great clinical significance to develop an artificial yellow ligament complex with good biocompatibility and bone integration function. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of artificial yellow ligament complex, it has good biocompatibility, strength and the function of promoting bone integration, can replace or repair damaged yellow ligament, improve the stability of the spine of patient, accelerate postoperative recovery rate.

[0006] The application is achieved by a kind of artificial yellow ligament complex, which is applied to the reconstruction of human spinal yellow ligament, comprising an artificial ligament and two fixing seats, the two ends of the artificial ligament are respectively fixedly connected with the two fixing seats; each of the two fixing seats is provided with a screw hole, and the two fixing seats are fixedly connected with the spine by being screwed into the respective screw holes.

[0007] Further, the two fixing seats have a porous structure, the porous structure comprises a plurality of micropores opened at the bottom of the fixing seat, the porosity of the micropores is 50% to 80%, and the pore size is 100 μm to 500 μm.

[0008] Further, the fixing seat and the micropore surface are modified and attached with a bone fusion promoting substance.

[0009] Further, the two fixing seats have a porous structure, the porous structure comprises a plurality of grooves opened at the bottom of the fixing seat.

[0010] Further, the grooves are distributed longitudinally and transversely.

[0011] Further, the artificial yellow ligament comprises at least one woven belt, the woven belt is woven after being made into a silk thread by using the same or different biocompatible polymer materials.

[0012] Further, the end of the fixing seat is provided with a fixing groove, and the end of the artificial ligament is inserted into and fixed in the fixing groove.

[0013] Further, the fixing groove is provided with a fixing column, and the artificial ligament is annular, and the two ends are respectively arranged on the fixing columns of the two fixing seats.

[0014] Further, the artificial yellow ligament is formed into a ring by sewing, fusion or injection molding.

[0015] Further, the fixing seat is made of titanium alloy.

[0016] Further, the bottom of the fixing seat extends downwardly to a sharp cone or a barb.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] The artificial flaval ligament complex provided by the application is used for flaval ligament reconstruction repair or strengthening of natural flaval ligament on the human spine. The artificial flaval ligament complex comprises an artificial ligament and two fixing seats, and the two ends of the artificial ligament are fixedly connected with the two fixing seats respectively. The two fixing seats are each provided with a screw hole, and the two fixing seats are fixedly connected with the spine by being screwed into the respective screw holes. After the artificial flaval ligament complex is installed on the spine, the removed flaval ligament can be replaced to maintain the mechanical stability of the spine, and the dura mater is covered to reduce postoperative dura mater scar. It can be seen that the artificial flaval ligament complex used in the application can replace the removed flaval ligament in the operation, improve the stability of the spine of the patient, reduce postoperative instability, protect the dura mater and nerves in the spinal canal, reduce scar adhesion, and improve the postoperative clinical effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic diagram of an artificial flaval ligament complex provided by an embodiment of the application;

[0020] Figure 2 FIG. 2 is another angle structural schematic diagram of the artificial flaval ligament complex shown in FIG. 1; Figure 1

[0021] Figure 3 FIG. 4 is a structural schematic diagram of the artificial flaval ligament complex shown in FIG. 1 after being screwed in; Figure 1

[0022] Figure 4a FIG. 5 is a structural schematic diagram of a second artificial flaval ligament complex provided by an embodiment of the application;

[0023] Figure 4b FIG. 6 is a structural schematic diagram of a third artificial flaval ligament complex provided by an embodiment of the application;

[0024] Figure 4c FIG. 7 is a structural schematic diagram of a fourth artificial flaval ligament complex provided by an embodiment of the application;

[0025] Figure 5 FIG. 8 is a structural schematic diagram of a fifth artificial flaval ligament complex provided by an embodiment of the application;

[0026] Figure 6 FIG. 9 is a structural schematic diagram of a fixing seat provided with a fixing column according to an embodiment of the application;

[0027] Figure 7 FIG. 10 is a connection structure schematic diagram of a ring-shaped artificial ligament and a fixing seat according to an embodiment of the application.

[0028] Reference numerals in the drawings:

[0029] 1, artificial ligament; 2, fixing seat; 21, screw hole; 22, micropore; 23, groove; 24, fixing groove; 25, fixing column; 3, screw.​​ DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0031] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model; the terms "first", "second", "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two components. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] Referring to Figure 1 and Figure 2 The embodiment provides a kind of artificial yellow ligament complex, for the repair of yellow ligament reconstruction on human body spine or strengthen natural yellow ligament, it includes artificial ligament 1 and two fixed seats 2, the two ends of artificial ligament 1 are respectively fixedly connected with two fixed seats 2;Two fixed seats 2 are equipped with two screw holes 21, and two fixed seats 2 are fixedly connected with the spine by screwing into the respective screw hole 21. Since fixed seat 2 is designed with two screw holes 21, it can ensure that artificial ligament 1 is stably fixed on vertebra during operation, to avoid postoperative displacement.

[0033] Specifically, fixed seat 2 is made of titanium alloy, titanium alloy material has good mechanical strength and biocompatibility, can exist stably in human body for a long time, and has high corrosion resistance.

[0034] The bottom of two fixed seats 2 is equipped with a plurality of pore structures. In the embodiment, the pore structure is a plurality of micropores 22 arranged in array on the bottom of fixed seat 2, and the hole depth direction of micropore 22 is parallel to the thickness direction of fixed seat 2. Preferably, the porosity of micropore 22 of the embodiment is 50%~80%, and the pore size is 100 μm~500 μm.

[0035] As shown in Figure 3 , the two fixing seats 2 are both flat, and each fixing seat 2 is provided with one or more inclined screw holes for screwing in the screw 3 from the side direction, so that the fixing seat 2 can be fixed on the spinous process of the human spine by screwing in the screw 3 into the screw hole 21. In actual application, the number of screws 3 to be screwed in is not limited (i.e. the number of screw holes 21 is not limited), and one or more screws 3 can be screwed in according to specific needs.

[0036] In order to more conveniently fix the fixing seat 2 on the spinous process under a microscope or in open surgery, the present embodiment further provides various types of artificial yellow ligament complexes.

[0037] Referring to Figure 4a , a second type of artificial yellow ligament complex provided by the present embodiment is shown, which includes a first fixing seat 2a and a second fixing seat 2b. The first fixing seat 2a and the second fixing seat 2b are both L-shaped, and the bottoms of both are provided with micro-holes 22 arranged in an array. The fixing seat 2 of this type is suitable for installation in a position with a relatively large installation space, and can semi-enclose the lamina, with a large contact area and firm connection.

[0038] Referring to Figure 4b , a third type of artificial yellow ligament complex provided by the present embodiment is shown, which includes a first fixing seat 2a and a second fixing seat 2b. The first fixing seat 2a is L-shaped, and the second fixing seat 2b is flat, and the bottoms of both are provided with micro-holes 22 arranged in an array. The first fixing seat 2b of this type is suitable for installation in a position with a relatively large installation space, while the second fixing seat 2b is suitable for installation in a relatively narrow position.

[0039] Referring to Figure 4c , a fourth type of artificial yellow ligament complex provided by the present embodiment is shown, which includes a first fixing seat 2a and a second fixing seat 2b. The bottoms of the first fixing seat 2a and the second fixing seat 2b both extend downward on one side to form a sharp cone or barb. The fixing seat 2 of this type is suitable for installation in a relatively narrow position, and the sharp cone or barb can be embedded in the lamina to form a fitting structure, which can prevent retraction under the long-term tension of the artificial ligament 1.

[0040] In other embodiments, referring to Figure 5 , the pore structure can also be a plurality of grooves 23 provided on the bottom of the fixing seat 2, and the plurality of grooves 23 are distributed in a crisscross manner.

[0041] By providing the pore structure on the bottom of the fixing seat 2, the growth and adhesion of bone cells can be promoted, the bone integration effect can be improved, postoperative complications can be reduced, and long-term stability can be ensured.

[0042] In order to improve the biocompatibility of the artificial ligament complex with human bone tissue, the surface of the fixing seat 2 and the micropore 22 is modified and attached with a bone fusion promoting substance.

[0043] In other embodiments, the surface of the fixing seat 2 is also provided with a magnesium or tantalum alloy coating to facilitate the osseointegration of the fixing seat 2 and the lamina.

[0044] In this embodiment, the artificial ligament 1 includes at least one woven band, which is made of the same or different biocompatible polymer materials (such as polyethylene, polyurethane, etc.) and is woven after being made into silk threads. It has sufficient strength and elasticity and can simulate the function of the natural yellow ligament.

[0045] Further, in order to strengthen the connection strength of the fixing seat 2 and the artificial ligament 1, with reference to Figure 6 , the end of the fixing seat 2 is provided with a fixing groove 24, and the fixing groove 24 is provided with a fixing column 25. Preferably, with reference to Figure 7 , the artificial ligament 1 is annular, and its two ends respectively extend into the fixing grooves 24 of the two fixing seats 2 and are wound on the fixing columns 25. In actual application, the artificial ligament 1 can be formed into a ring shape by sewing, fusion or injection molding, etc. Since the artificial ligament 1 is designed as a plurality of closed ring structures, it avoids the artificial ligament 1 from being separated from the fixing seat 2, and improves the firmness of the connection between the two.

[0046] The manufacturing process of the artificial yellow ligament complex of the present embodiment is as follows:

[0047] First, according to the anatomical structure of the patient's spine, the size of the artificial yellow ligament complex is designed. The artificial ligament 1 is made by injection molding or 3D printing technology to ensure the accuracy of its shape and function. The fixing seat 2 is accurately manufactured by metal processing technology, and the pore structure can be realized by laser drilling or etching technology.

[0048] The implantation surgery process of the artificial yellow ligament complex of the present embodiment is as follows:

[0049] During the operation, the damaged yellow ligament site is located and exposed by the traditional spinal surgery method, and the fixing seat of the artificial yellow ligament complex is fixed with the vertebrae using special tools and screws. After the operation, the patient can perform appropriate rehabilitation training to promote bone integration.

[0050] In summary, the artificial flavobranchial complex adopted in the embodiment has good biocompatibility, strength and function of promoting bone integration, when the artificial flavobranchial complex of the embodiment is installed on the spine, can replace the damaged flavobranchial ligament removed or repaired in the operation, maintain the mechanical stability of the spine, and cover the dura mater to reduce the postoperative dura mater scar. Compared with the traditional flavobranchial reconstruction or repair operation mode, the application of the artificial flavobranchial complex of the embodiment can improve the stability of the patient's spine, reduce postoperative instability, protect the dura mater and nerves in the spinal canal, reduce scar adhesion, and improve the postoperative clinical effect.

[0051] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An artificial flavum ligament complex for use in reconstruction of the flavum ligament of the human spinal column, characterized in that, The artificial ligament is fixedly connected with two fixing bases, and the two fixing bases are fixedly connected with screws.

2. Artificial ligament complex according to claim 1, characterized in that The two fixing bases have a porous structure, which comprises a plurality of micropores formed in the bottom of the fixing base.

3. Artificial ligament complex according to claim 2, characterized in that The fixing base and the micropore surface are modified and attached with a bone fusion promoting substance.

4. The artificial flava ligament complex of claim 1, wherein, The two fixing bases have a porous structure, which comprises a plurality of grooves formed in the bottom of the fixing base.

5. The artificial yellow ligament complex according to claim 1, characterized in that, The artificial yellow ligament comprises at least one woven belt, which is woven by silk threads made of the same or different biocompatible polymer materials.

6. The artificial flava ligament complex of claim 1, wherein, The end of the fixing base is provided with a fixing groove, and the end of the artificial ligament is inserted into and fixed in the fixing groove.

7. The artificial yellow ligament complex according to claim 6, characterized in that, The fixing groove is provided with a fixing column, and the artificial ligament is annular, and the two ends thereof are respectively arranged on the fixing columns of the two fixing bases.

8. The artificial yellow ligament complex according to claim 7, characterized in that, The artificial yellow ligament is formed in an annular shape by sewing, fusion or injection molding.

9. The artificial yellow ligament complex according to claim 1, characterized in that, The fixing base is made of titanium alloy.

10. The artificial flava ligament complex of claim 1, wherein, The bottom of the fixing base extends downward to form a sharp cone or a barb.

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