Bone knife for treating articular surface of spinal zygopophysis
By designing a bone knife with an inclined and curved head, the problem of inconvenience in handling the articular surface of the spinal joints is solved, and more efficient cartilage destruction and bone fusion are achieved, improving spinal stability and surgical effect.
Patent Information
- Application Number
- CN202421334128.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-12
AI Technical Summary
Traditional bone knives are inconvenient to handle the articular surface of the spinal joint process and cannot effectively destroy the joint cartilage, resulting in poor bone fusion effect.
A tilted sheet-shaped knife knife is designed. The angle between the knife head and the connecting rod is 35°-50°. The knife head is arc-shaped to match the arc of the articular process. Both sides are raised to file the cartilage, and scale lines are provided on the sides to control the depth.
The bone knife can more easily enter and destroy the deep cartilage of the articular joints, promote bone fusion, improve stability behind the spine, reduce surgical trauma and reduce costs.
Smart Images
Figure CN222765215U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical instruments, in particular to a bone knife for processing the articular process surface of the spine. Background Art
[0002] Spinal motion is a complex motion, which is formed by the integration of various motion segments. The motion segment is formed by the intervertebral disc and the two articular process joints of the corresponding plane connecting the adjacent vertebrae. It is the structural and functional unit of the spine. For a certain motion segment, the intervertebral disc and the two articular process joints form a stable triangle in the horizontal direction and a symmetrical triangular prism-shaped three-dimensional structure in the longitudinal direction. As a whole, it forms a stable three-joint union. The three restrain each other to maintain the stability of the spine. Articular process joint fusion can increase the spinal resistance to rotation, shear force and tension or posterior column separation, and limit most of the intervertebral activities. Articular process joint fusion can be combined with various spinal fusions as an auxiliary means to strengthen the pedicle screw internal fixation system, intervertebral fusion or transverse process fusion, or it can be used alone. The key to articular process joint fusion is the treatment of the articular surface bone graft bed. There is articular cartilage on the surface of the articular process joint. In order to obtain satisfactory bone fusion, the articular process articular cartilage surface must be fully treated. The articular process joint space is narrow, and the joint surfaces are mostly uneven and have a certain angle. Traditional bone knives are mostly straight shovel type and cannot enter the deep part of the articular process joint space with a certain curvature. In addition, the front and back sides of traditional bone knives are smooth and cannot destroy the articular cartilage well, which makes traditional bone knives very inconvenient when dealing with the articular process joint surfaces. Summary of the invention
[0003] The utility model provides a bone knife for processing the articular process surface of the spine, so as to solve the technical problem of inconvenient operation for processing the articular process surface in the prior art.
[0004] The utility model solves the above technical problems through the following technical solutions:
[0005] A bone knife for processing the articular process of the spine, comprising a knife head, a connecting rod, and a handle, wherein the knife head is in the form of a sheet, and the knife head and the handle are respectively arranged at the upper and lower ends of the connecting rod, and the knife head is arranged obliquely, and the angle α between the knife head and the connecting rod is 35°-50°, so as to facilitate operation and use without blocking the visual range. The thickness of the knife head gradually increases from the top to the bottom end, and the front and rear surfaces of the knife head are evenly distributed with protrusions, and the longitudinal section of the protrusions is triangular.
[0006] The above-mentioned osteotome for processing the articular surface of the spinal articular process has an arc-shaped blade head, the arc of which matches the frontal arc of the articular process, and scale lines are provided on the side of the blade head.
[0007] In the above-mentioned bone knife for processing the articular surface of the spinal facet, the gap of the protrusion is gradually distributed from the knife head end to the connecting rod end, first small and then large.
[0008] The above-mentioned osteotome for processing the articular process surface of the spine has protrusions on both sides and the top surface of the knife head.
[0009] The thickness of the top of the bone knife for treating the spinal facet joint surface is not less than 2 mm.
[0010] Compared with the prior art, the arc-shaped blade head of the utility model can more easily process the facet joint cartilage, promote the postoperative facet joint fusion rate, thereby improving the stability of the posterior spine and preventing the breakage of postoperative screws; for some patients, only lamina decompression and pedicle screw internal fixation facet joint fusion can be used, without the need for intervertebral fusion, reducing surgical trauma, reducing the use of intervertebral fusion devices, and reducing the cost of orthopedic consumables. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of the utility model;
[0012] Figure 2 It is a structural schematic diagram of the top surface of the utility model;
[0013] Figure 3 yes Figure 2 A partial enlarged view of the middle A part;
[0014] Figure 4 It is a structural schematic diagram of the end portion of the cutter head of the utility model;
[0015] The marks in the accompanying drawings indicate: 1. blade head, 2. connecting rod, 3. handle, 4. protrusion, 5. scale line. DETAILED DESCRIPTION
[0016] The following is a further detailed description of the specific implementation of the utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the utility model.
[0017] like Figures 1 to 4The utility model includes a cutter head 1, a connecting rod 2 and a handle 3. The cutter head 1 is in the shape of a sheet and is made of stainless steel. The cutter head 1 and the handle 3 are respectively arranged at the upper and lower ends of the connecting rod 2. The cutter head 1 is arranged obliquely. The angle α between the cutter head 1 and the connecting rod 2 is 35°-50°. The thickness of the cutter head 1 gradually increases from the top to the bottom, which is convenient for chiseling the cutter head 1 into the articular process joint gap. The front and back surfaces of the cutter head 1 are evenly distributed with protrusions 4, and the longitudinal section of the protrusions 4 is triangular. In the process of the cutter head 1 entering the joint gap, the protrusions on the front of the cutter head 1 can file and destroy the articular cartilage; the arc-shaped cutter head 1 is easier to enter the deep part of the curved joint gap and can destroy the deep articular cartilage.
[0018] The blade head 1 is arc-shaped, and the arc matches the arc of the articular process, so that the blade head 1 can enter the deep part of the articular surface of the arc-shaped articular process. The side of the blade head 1 is provided with scale lines. The minimum scale value of the scale is 2mm, and the range is 10mm. It can prevent the blade head 1 from being quantified and avoid nerve damage caused by entering too deep.
[0019] The gap of the protrusion 4 is gradually distributed from the end of the blade head 1 to the end of the connecting rod 2, which is first small and then large. It is helpful to repeatedly polish the cartilage surface, which can better destroy the articular cartilage, make the articular process joints contact with bones, and promote the bony fusion of the articular process joints. The protrusions 4 are provided on both sides and the top surface of the blade head 1, so that the cartilage and surrounding tissues on the surface of the articular process can be cleaned.
[0020] The thickness of the top of the blade head 1 of the osteotome for treating the articular process of the spinal column is not less than 2 mm. The thickness of the blade head 1 is generally 2-5 mm, and the specifications of the blade head 1 are generally 10 mm×10 mm or 8 mm×6 mm.
[0021] The front of the blade head 1 is scaled to prevent the blade head 1 from entering too deeply and causing nerve damage. The thickness of the blade head 1 is generally 2-5 mm, and the specifications of the blade head 1 are generally 10 mm×10 mm or 8 mm×6 mm.
[0022] When processing the articular process joint surface, the front of the arc-shaped blade head 1 is aligned with the curvature of the articular process joint, and the blade head 1 is chiseled into the articular process joint gap. During the process of the blade head 1 entering the joint gap, the protrusions 4 on the front and back of the blade head 1 can file and destroy the articular cartilage. The blade head 1 is arranged in an arc shape, so that the blade head 1 can more easily enter the deep part of the curved joint gap and destroy the deep articular cartilage.
[0023] For some patients who need vertebral plate decompression and pedicle screw internal fixation facet arthrodesis, intervertebral fusion is not necessary, which reduces surgical trauma, reduces the use of intervertebral fusion devices, and reduces the cost of orthopedic consumables.
[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A bone knife for treating the facet joints of the spine, characterized in that: The invention comprises a blade head (1), a connecting rod (2) and a handle (3), wherein the blade head (1) is in the form of a sheet, the blade head (1) and the handle (3) are respectively arranged at the upper and lower ends of the connecting rod (2), the blade head (1) is arranged obliquely, the angle α between the blade head (1) and the connecting rod (2) is 35°-50°, the thickness of the blade head (1) gradually increases from the top end to the bottom end, and the front and rear surfaces of the blade head (1) are evenly distributed with protrusions (4), and the longitudinal section of the protrusions (4) is triangular.
2. The osteotome for treating the facet joints of the spine as claimed in claim 1, characterized in that: The blade head (1) is arc-shaped, the curvature of the blade head matches the curvature of the articular process, and scale lines are provided on the side of the blade head (1).
3. The osteotome for treating the facet joints of the spine as claimed in claim 2, characterized in that: The gap of the protrusion (4) is distributed gradually from the cutter head (1) end to the connecting rod (2) end, first smaller and then larger.
4. The osteotome for treating the facet joints of the spine as claimed in claim 3, characterized in that: Both sides and the top surface of the cutter head (1) are provided with protrusions (4).
5. The osteotome for treating the facet joints of the spine as claimed in claim 4, characterized in that: The thickness of the top end of the blade head (1) is not less than 2 mm.