Lumbar zygapophyseal joint stabilizer

Abstract

The invention provides a lumbar zygapophyseal joint stabilizer which comprises an upper joint and a lower joint, and a stabilizer is arranged at the intersection of the upper joint and the lower joint. The stabilizer comprises an upper zygapophysis component and a lower zygapophysis component, a gasket is arranged between the upper zygapophysis component and the lower zygapophysis component, grooves are formed in the upper surface and the lower surface of the gasket, and cambered surface protrusions matched with the grooves are arranged on the surfaces, corresponding to the gasket, of the upper zygapophysis component and the lower zygapophysis component. The upper zygapophysis component and the lower zygapophysis component are fixed on a resection part, a gasket is arranged between the upper zygapophysis component and the lower zygapophysis component, grooves are formed in the upper surface and the lower surface of the gasket, and cambered surface protrusions matched with the grooves of the gasket are arranged on the surfaces, corresponding to the gasket, of the upper zygapophysis component and the lower zygapophysis component. Therefore, the gasket can be clamped between the upper zygopophysis component and the lower zygopophysis component, the gasket is effectively prevented from sliding out, and the stability of the stabilizer is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a lumbar zygapophyseal joint stabilizer. Background Art

[0002] In the treatment of lumbar joint diseases, the application of lumbar zygapophyseal joint stabilizers is crucial. However, there are many serious problems with the currently widely used stabilizers.

[0003] Traditional stabilizer implantation methods usually rely on open surgery, which means making a large incision on the patient's body, widely stripping tissues and muscles, causing greater interference and damage to the surrounding nerves, blood vessels and other structures. This traumatic operation not only increases the risks of surgery, such as the incidence of complications like bleeding and infection, but also prolongs the patient's postoperative recovery time, causes more pain, and may leave obvious scars.

[0004] In addition, the existing stabilizers have functional defects in design. When most stabilizers fix the joint, they adopt a method of completely restricting joint movement. Although this provides a certain degree of stability in the short term, in the long run, it greatly affects the normal physiological function of the joint. The inability of the joint to move will lead to atrophy of the surrounding muscles and joint stiffness, thereby affecting the patient's daily activities, such as walking and bending, and seriously reducing the patient's quality of life.

[0005] The trauma of this surgical method and the limitations of the stabilizer function make the treatment effect of lumbar joint diseases unsatisfactory, bringing a heavy burden to patients. Therefore, there is an urgent need for a new lumbar zygapophyseal joint stabilizer that can not only reduce surgical trauma but also allow the joint to move moderately while providing stability to meet the needs of clinical treatment. Summary of the Invention

[0006] To overcome the existing problems, the embodiments of the present application provide a lumbar zygapophyseal joint stabilizer. By removing a part of the intersection of the upper joint and the lower joint to provide space for the installation of the stabilizer, fixing the upper zygapophysis component and the lower zygapophysis component at the resection site. There is a gasket between the upper zygapophysis component and the lower zygapophysis component. Grooves are provided on both the upper and lower surfaces of the gasket, and arc-shaped protrusions matching the grooves of the gasket are also provided on the corresponding surfaces of the upper zygapophysis component and the lower zygapophysis component. In this way, the gasket can be clamped between the upper zygapophysis component and the lower zygapophysis component, effectively preventing the gasket from slipping out and ensuring the stability of the stabilizer. The surgical operation process is optimized, the surgical incision is reduced. Different from the traditional stabilizer that fixes and fuses the joint, while providing stable support, it allows the joint to move normally within a certain range, thus avoiding problems such as loss of joint mobility, joint stiffness and secondary muscle atrophy, enabling the patient to maintain good mobility after surgery and improving the quality of life.

[0007] The technical solution adopted by the embodiments of the present application to solve its technical problems is as follows:

[0008] A lumbar facet joint stabilizer, comprising an upper joint and a lower joint, wherein a stabilizer is provided at the intersection of the upper joint and the lower joint;

[0009] Wherein, the stabilizer includes an upper articular process component and a lower articular process component, a gasket is provided between the upper articular process component and the lower articular process component, and the surfaces of the upper articular process component, the lower articular process component and the gasket are specially treated to improve biocompatibility and wear resistance. The gasket is made of a material with wear resistance and corrosion resistance, such as ultra-high molecular weight polyethylene. Grooves are provided on both the upper and lower surfaces of the gasket, and arc-shaped protrusions that cooperate with the grooves are provided on the corresponding surfaces of the upper articular process component and the lower articular process component and the gasket. The size of the grooves is the same as the size of the arc-shaped protrusions, and the shapes and sizes of the grooves and the arc-shaped protrusions are precisely matched to ensure tight combination. Grooves are provided on both the upper and lower surfaces of the gasket, and arc-shaped protrusions that cooperate with the grooves of the gasket are also provided on the corresponding surfaces of the upper articular process component and the lower articular process component and the gasket, so that the gasket can be clamped between the upper articular process component and the lower articular process component, effectively preventing the gasket from slipping out.

[0010] Preferably, rivets are provided inside both the upper articular process component and the lower articular process component. The upper articular process component and the lower articular process component are firmly fixed to the corresponding excised parts of the upper joint and the lower joint through the rivets. During the daily activities of the patient, the cooperation structure of the gasket with the upper articular process component and the lower articular process component allows the joint to move within a certain range, while providing stable support to ensure the function and stability of the joint. The rivets are made of a material with good biocompatibility, an elastic modulus close to that of normal bone tissue, and sufficient mechanical strength for compression and anti-torsion, such as titanium alloy. The rivets fix the upper articular process component and the lower articular process component to the corresponding excised parts of the upper joint and the lower joint. The upper articular process component and the lower articular process component are also made of a material with high strength and good biocompatibility, such as titanium alloy or cobalt-chromium-molybdenum alloy.

[0011] Preferably, the upper articular process component and the lower articular process component have the same size, and the edges and corners of the upper articular process component and the lower articular process component are rounded.

[0012] Preferably, insertion rods are provided at one ends of the upper articular process components away from the gasket. The insertion rods are of an inclined structure, and through grooves are provided inside the insertion rods. The size of the gasket is smaller than the sizes of the upper articular process component and the lower articular process component. The rivets are correspondingly connected to the through grooves inside the insertion rods. The number, distribution position and insertion direction of the rivets are measured by imaging software and are designed according to individual anatomical characteristics to ensure the firmness of the fixation.

[0013] The advantages of the embodiments of the present application are as follows:

[0014] 1. By removing a part at the intersection of the upper joint and the lower joint, space is provided for the installation of the stabilizer. The upper articular process component and the lower articular process component are fixed at the resection site. A gasket is provided between the upper articular process component and the lower articular process component. Grooves are formed on both the upper and lower surfaces of the gasket, and arc-shaped protrusions matching the grooves of the gasket are also provided on the corresponding surfaces of the upper articular process component and the lower articular process component. In this way, the gasket can be clamped between the upper articular process component and the lower articular process component, effectively preventing the gasket from slipping out, ensuring the stability of the stabilizer, optimizing the surgical operation process, reducing the surgical incision, different from the traditional way of fixing and fusing joints by the stabilizer, while providing stable support, allowing the joint to move normally within a certain range, thus avoiding problems such as loss of joint mobility, joint stiffness, and muscle atrophy, enabling the patient to maintain better mobility after the operation and improving the quality of life.

[0015] 2. In order to firmly fix the upper articular process component and the lower articular process component on the corresponding resected parts of the upper joint and the lower joint respectively, rivets are added to fix the upper articular process component and the lower articular process component to the upper joint and the lower joint respectively, thereby reducing the surgical incision, reducing the surgical trauma, effectively preventing the displacement and loosening of the components, ensuring the long-term stable effect, reducing the risk of secondary surgery and the economic burden of the patient.

[0016] 3. Through innovative design and implantation methods, the interference with tissues, muscles, nerves, and blood vessels is reduced, significantly reducing the risk of complications such as intraoperative bleeding and postoperative infection, and greatly reducing the degree of surgical trauma. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall exploded structure of the stabilizer in the lumbar facet joint stabilizer of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall structure of the upper articular process component in the lumbar facet joint stabilizer of the present invention;

[0020] Figure 3 It is a schematic diagram of the overall structure of the gasket in the lumbar facet joint stabilizer of the present invention;

[0021] Figure 4 It is a schematic diagram of the overall structure of the lower articular process component in the lumbar facet joint stabilizer of the present invention;

[0022] Figure 5 It is a schematic diagram of the connection structure of the upper joint, the lower joint, and the stabilizer in the lumbar facet joint stabilizer of the present invention.

[0023] Description of main reference numerals:

[0024] 10. Stabilizer; 1. Upper articular protrusion component; 2. Lower articular protrusion component; 3. Gasket; 4. Groove; 5. Arc-surface protrusion; 6. Rivet; 7. Upper joint; 8. Lower joint; 9. Insert rod; 11. Through hole. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, for the convenience of description below, the referenced "up", "down", "left" and "right" are equal to the up, down, left and right directions of the drawings themselves. The "first", "second" and so on in the following text are distinguished for the description and have no other special meanings.

[0026] The embodiment of the present application solves the problems in the prior art by providing a lumbar articular process joint stabilizer, and provides space for the installation of the stabilizer by partially removing the intersection of the upper joint and the lower joint, and fixing the upper articular process component and the lower articular process component on the removed part, and a gasket is provided between the upper articular process component and the lower articular process component, and grooves are provided on the upper and lower surfaces of the gasket, and arc-shaped protrusions matching the gasket grooves are also provided on the corresponding surfaces of the upper articular process component and the lower articular process component and the gasket, so that the gasket can be stuck between the upper articular process component and the lower articular process component, effectively preventing the gasket from slipping out, ensuring the stability of the stabilizer, optimizing the surgical operation process, reducing the surgical incision, and different from the traditional stabilizer that fixes and fuses the joint, while providing stable support, it allows the joint to be within a certain range. Normal activities in the joint can be achieved, thus avoiding problems such as loss of joint mobility, joint stiffness and muscle atrophy, so that patients can maintain good mobility after surgery and improve their quality of life; in order to firmly fix the upper articular process component and the lower articular process component on the corresponding resected parts of the upper joint and the lower joint, rivets are added to fix the upper articular process component and the lower articular process component to the upper joint and the lower joint respectively, thereby reducing the surgical incision, reducing surgical trauma, effectively preventing the displacement and loosening of components, ensuring long-term stable effects, and reducing the risk of secondary surgery and the economic burden on patients; through innovative design and implantation methods, interference with tissues, muscles, nerves and blood vessels is reduced, the amount of bleeding during surgery and the risk of complications such as postoperative infection are significantly reduced, and the degree of surgical trauma is greatly reduced.

[0027] The technical solution in the embodiment of the present application is to solve the above problems, and the overall idea is as follows:

[0028] Embodiment

[0029] This embodiment presents the specific structure of the lumbar facet joint stabilizer, as Figures 1-5 shown, including the upper joint 7 and the lower joint 8, and a stabilizer 10 is provided at the intersection of the upper joint 7 and the lower joint 8;

[0030] Among them, the stabilizer 10 includes an upper facet component 1 and a lower facet component 2. A gasket 3 is provided between the upper facet component 1 and the lower facet component 2. The surfaces of the upper facet component 1, the lower facet component 2, and the gasket 3 are specially treated to improve biocompatibility and wear resistance. The gasket 3 is made of a material with elasticity and wear resistance, such as polyethylene or polyetheretherketone. Grooves 4 are opened on both the upper and lower surfaces of the gasket 3, and arc-shaped protrusions 5 that cooperate with the grooves 4 are provided on the corresponding surfaces of the upper facet component 1 and the lower facet component 2 and the gasket 3. The size of the grooves 4 is the same as the size of the arc-shaped protrusions 5, and the shapes and sizes of the grooves 4 and the arc-shaped protrusions 5 are precisely matched to ensure tight combination. Grooves 4 are opened on both the upper and lower surfaces of the gasket 3, and arc-shaped protrusions 5 that cooperate with the grooves 4 of the gasket 3 are also provided on the corresponding surfaces of the upper facet component 1 and the lower facet component 2 and the gasket 3. In this way, the gasket 3 can be clamped between the upper facet component 1 and the lower facet component 2, effectively preventing the gasket 3 from slipping out.

[0031] Rivets 6 are provided inside both the upper facet component 1 and the lower facet component 2. Through the rivets 6, the upper facet component 1 and the lower facet component 2 are firmly fixed to the corresponding excised parts of the upper joint 7 and the lower joint 8. During the daily activities of the patient, the mating structure of the gasket 4 with the upper facet component 1 and the lower facet component 2 allows the joint to move within a certain range, while providing stable support to ensure the function and stability of the joint. The rivets 6 are made of a material with good biocompatibility, an elastic modulus close to that of normal bone tissue, and sufficient mechanical strength for compression and anti-torsion, such as titanium alloy. The rivets 6 fix the upper facet component 1 and the lower facet component 2 to the corresponding excised parts of the upper joint 7 and the lower joint 8. The upper facet component 1 and the lower facet component 2 are made of a material with high strength and good biocompatibility, such as titanium alloy or cobalt-chromium-molybdenum alloy.

[0032] The upper facet component 1 and the lower facet component 2 have the same size, and the edges and corners of the upper facet component 1 and the lower facet component 2 are rounded.

[0033] Insertion rods 9 are provided at one end of the upper facet component 1 away from the gasket 3. The insertion rods 9 are of an inclined structure, and through slots 11 are opened inside the insertion rods 9. The size of the gasket 3 is smaller than the sizes of the upper facet component 1 and the lower facet component 2. The rivets 6 are correspondingly connected to the through slots 11 inside the insertion rods 9, and the number and distribution positions of the rivets 6 are carefully designed to ensure the firmness of the fixation.

[0034] By adopting the above technical solutions:

[0035] In a well-known orthopedic hospital, a patient with intractable low back pain caused by lumbar facet joint instability received treatment.

[0036] The doctor used the lumbar facet joint stabilizer of the present invention. The structure of the stabilizer was customized individually by 3D printing technology. During the operation, the intersecting part of the superior articular process 7 and the inferior articular process 8 was precisely resected, and then the stabilizer 10 was smoothly installed. The superior articular process component 1 in the stabilizer 10 was connected to the superior articular process 7, and the inferior articular process component 2 was connected to the inferior articular process 8. And gaskets 3 were provided on the corresponding surfaces of the superior articular process component 1 and the inferior articular process component 2. Grooves 4 were opened on both the upper and lower surfaces of the gasket 3, and arc-shaped protrusions 5 that matched the grooves 4 of the gasket 3 were also provided on the corresponding surfaces of the superior articular process component 1 and the inferior articular process component 2. In this way, the gasket 3 could be clamped between the superior articular process component 1 and the inferior articular process component 2, effectively preventing the gasket 3 from slipping out and ensuring the stability of the stabilizer 10. The superior articular process component 1 and the inferior articular process component 2 were firmly fixed to the corresponding resected parts of the superior articular process 7 and the inferior articular process 8 through rivets 6. When the patient was performing daily activities, the cooperation structure of the gasket 4 with the superior articular process component 1 and the inferior articular process component 2 allowed the joint to move within a certain range. After the operation, the patient recovered well, the joint could maintain a certain range of mobility, and the patient's mobility in daily life was significantly improved.

[0037] The working principle is as follows:

[0038] First, during the operation, the corresponding part at the intersection of the superior articular process 7 and the inferior articular process 8 was precisely resected to create conditions for the installation of the stabilizer 10.

[0039] Then, the superior articular process component 1 and the inferior articular process component 2 were fixed to the resected parts. Gaskets 3 were provided between the superior articular process component 1 and the inferior articular process component 2. Grooves 4 were opened on both the upper and lower surfaces of the gasket 3, and arc-shaped protrusions 5 that matched the grooves 4 of the gasket 3 were also provided on the corresponding surfaces of the superior articular process component 1 and the inferior articular process component 2. In this way, the gasket 3 could be clamped between the superior articular process component 1 and the inferior articular process component 2, effectively preventing the gasket 3 from slipping out and ensuring the stability of the stabilizer 10.

[0040] The superior articular process component 1 and the inferior articular process component 2 were firmly fixed to the corresponding resected parts of the superior articular process 7 and the inferior articular process 8 through rivets 6. When the patient was performing daily activities, the cooperation structure of the gasket 4 with the superior articular process component 1 and the inferior articular process component 2 allowed the joint to move within a certain range and at the same time provided stable support to ensure the function and stability of the joint.

[0041] Finally, it should be noted that: Obviously, the above embodiments are merely examples given to clearly illustrate the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. Lumbar facet joint stabilizer, characterized in that: It comprises an upper joint (7) and a lower joint (8), wherein a stabilizer (10) is provided at the intersection of the upper joint (7) and the lower joint (8); The stabilizer (10) comprises an upper articular process component (1) and a lower articular process component (2), a gasket (3) is provided between the upper articular process component (1) and the lower articular process component (2), a groove (4) is provided on the upper and lower surfaces of the gasket (3), and an arc-shaped protrusion (5) matching the groove (4) is provided on the corresponding surfaces of the upper articular process component (1) and the lower articular process component (2) and the gasket (3).

2. The lumbar facet joint stabilizer according to claim 1, characterized in that: Rivets (6) are inserted into the upper articular process component (1) and the lower articular process component (2), and the rivets (6) fix the upper articular process component (1) and the lower articular process component (2) to the corresponding removed parts of the upper joint (7) and the lower joint (8).

3. The lumbar facet joint stabilizer according to claim 1, characterized in that: The upper articular process component (1) and the lower articular process component (2) have the same size.

4. The lumbar facet joint stabilizer according to claim 1, characterized in that: The size of the gasket (3) is smaller than the size of the upper articular process component (1) and the lower articular process component (2).

5. The lumbar facet joint stabilizer according to claim 1, characterized in that: The corners of the upper articular process component (1) and the lower articular process component (2) are rounded.

6. The lumbar facet joint stabilizer according to claim 1, characterized in that: An insertion rod (9) is provided at one end of the upper articular protrusion component (1) away from the gasket (3); the insertion rod (9) is an inclined structure, and a through groove (11) is provided inside the insertion rod (9).

7. The lumbar facet joint stabilizer according to claim 1, characterized in that: The size of the groove (4) is the same as the size of the arc-surface protrusion (5).

8. The lumbar facet joint stabilizer according to claim 6, characterized in that: The rivet (6) is correspondingly connected to the through groove (11) inside the insertion rod (9).

Images