Vertebral body reduction and bone grafting device with percutaneous vertebral pedicle screw for spine
By designing a percutaneous pedicle screw vertebra bone grafting device of the spinal percutaneous pedicle screw vertebra, including a rotating handle, outer cannula, inner core and reed, the problem of poor reduction of severe vertebra compression fractures and lack of bone grafting equipment is solved, and efficient fracture reduction and bone grafting effects are achieved.
Patent Information
- Application Number
- CN202510156315.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2025-05-30
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, it is difficult to achieve ideal postoperative vertebral height recovery when dealing with severe vertebral compression fractures, and the commonly used methods are traumatized and have high risks, and there is a lack of equipment specifically used for minimally invasive reduction of bone grafts by percutaneous pedicle screws.
A percutaneous pedicle screw vertebral bone graft is designed, including a rotating handle, outer cannula, inner core and reed. By rotating the outer cannula, the threads of the outer cannula and the inner core are pressurized, the reeds are expanded, the fracture is expanded, and bone grafted into the vertebral body through the hollow part of the inner core.
It improves the efficiency of fracture reduction, reduces the occurrence of long-term nonunion, and achieves a minimally invasive bone grafting effect with less trauma.
Smart Images
Figure CN120053157A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of medical instruments, in particular to a spinal percutaneous pedicle screw vertebral body reshaping bone implant. Background Art
[0002] In the field of spinal diseases, vertebral compression fractures are a common and highly prevalent disease. With the continuous development of medical technology, minimally invasive treatment has been widely used in clinical practice due to its significant advantages. Percutaneous pedicle screw reduction, as a minimally invasive surgical method, has many advantages such as fast recovery, less trauma, shorter hospitalization time and fewer complications.
[0003] However, this approach has obvious limitations for patients with severe fracture compression. Percutaneous pedicle screw reduction often fails to achieve the ideal postoperative vertebral height restoration effect in such cases. Due to severe fracture compression, the bone defect in the vertebral body is usually large, which significantly increases the possibility of kyphosis, delayed union, nonunion, and nonunion during the long-term postoperative recovery process.
[0004] In order to solve these problems, open decompression and transpedicular bone grafting or posterolateral bone grafting are commonly used in clinical practice. However, these methods are not only more traumatic, but also increase the complexity and risk of the operation.
[0005] In addition, in current clinical practice, there is still a lack of instruments specifically used for minimally invasive reduction and bone grafting with percutaneous pedicle screws, which to some extent limits the effectiveness and scope of application of minimally invasive surgery in treating severe vertebral compression fractures. Summary of the invention
[0006] In order to overcome the existing problems, the present application provides a spinal percutaneous pedicle screw vertebral body reconstruction bone implant, which includes a rotating handle, an outer sleeve, an inner core and a spring. When used for vertebral compression fractures, it is placed in a pre-opening position and the outer sleeve is rotated. Due to the threaded pressure of the outer sleeve and the inner core, the spring is expanded, thereby playing a role in opening and reducing. After the fracture is reduced, bone can be implanted into the vertebral body through the hollow part of the inner core, which can improve the fracture reduction efficiency and reduce the occurrence of long-term bone nonunion.
[0007] The technical solution adopted by the embodiment of the present application to solve the technical problem is: A spinal percutaneous pedicle screw vertebral body reconstructive bone implant, comprising a rotating handle and an outer sleeve, wherein the rotating handle and the outer sleeve are abuttingly connected, an inner core is passed through the outer sleeve, and one end of the inner core extends to the top of the rotating handle; Among them, a spring is provided at the bottom end of the outer sleeve. The spring is an arc-shaped structure, one end of which is fixed at the bottom end of the outer sleeve. It can expand or contract with the relative movement of the outer sleeve and the inner core. The outer sleeve is driven to rotate by rotating the rotating handle. The threaded pressure of the outer sleeve and the inner core causes the spring to expand to achieve expansion and resetting. Due to the threaded pressure of the outer sleeve and the inner core, the rotation of the rotating handle causes the spring to expand, thereby achieving the effect of expansion and resetting.
[0008] Preferably, the outer sleeve is a tubular structure with a frosted surface. A rotating shaft is provided at the contact position between the bottom end of the outer sleeve and the reed. When the outer sleeve rotates, the rotation of the rotating shaft can avoid the problem of synchronous rotation of the reed. A base is provided at the bottom end of the reed, and the base is a hollow structure.
[0009] Preferably, the inner core is a tubular structure, the cross-sectional diameter of the inner core is smaller than the cross-sectional diameter of the outer sleeve, and the reed is an arc-shaped structure, one end of which is fixed to the bottom end of the outer sleeve and can expand or contract with the relative movement of the outer sleeve and the inner core.
[0010] Preferably, a threaded seat is provided inside the outer sleeve, the threaded seat is rotatably connected to the inner core, the outer wall of the inner core is provided with a threaded groove, and the inner wall of the hollow part is provided with anti-blocking protrusions or textures, so that the inner core can rotate with the threaded seat inside the outer sleeve.
[0011] Preferably, the outer wall of the rotating handle is provided with anti-slip stripes. When the rotating handle is rotated, the anti-slip stripes can avoid the problem of sliding. The rotating handle and the inner core are provided with through holes at the corresponding positions, so that the inner core can pass through the inside of the rotating handle and the inside of the outer sleeve.
[0012] The advantages of the embodiments of the present application are: The bone grafting device comprises a rotating handle, an outer sleeve, an inner core and a spring. When used for vertebral compression fractures, the device is placed in a pre-opening position and the outer sleeve is rotated. Due to the threaded pressure of the outer sleeve and the inner core, the spring is expanded, thereby playing a role of opening and reducing. After the fracture is reduced, bone can be grafted into the vertebral body through the hollow part of the inner core, which can improve the fracture reduction efficiency and reduce the occurrence of long-term bone nonunion. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0014] Figure 1 It is a schematic diagram of the overall structure of the spinal percutaneous pedicle screw vertebral body repair bone implant of the present invention; Figure 2 It is a schematic diagram of the overall structure of the reed in the compressed state of the spinal percutaneous pedicle screw vertebral body reconstructive bone implant of the present invention; Figure 3 Schematic diagram of the overall half-section structure of the outer sleeve in the percutaneous vertebral pedicle screw vertebral body reduction and bone grafting device of the present invention; Figure 4 Schematic diagram of the overall structure of the connection between the reed and the rotating shaft in the percutaneous vertebral pedicle screw vertebral body reduction and bone grafting device of the present invention.
[0015] Description of the main reference numerals: 1. Rotating handle; 2. Outer sleeve; 3. Inner core; 4. Reed; 5. Threaded seat; 6. Rotating shaft; 7. Base. Detailed implementation manners
[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. In addition, for convenience of description below, the "upper", "lower", "left", "right", etc. cited are consistent with the upper, lower, left, right, etc. of the accompanying drawings themselves. The "first", "second", etc. in the following text are for distinction in description and have no other special meanings.
[0017] The embodiment of the present application provides a percutaneous vertebral pedicle screw vertebral body reduction and bone grafting device to solve the problems in the prior art. The bone grafting device includes a rotating handle, an outer sleeve, an inner core and a reed. When applied to vertebral compression fractures, it is placed in the pre-expanded position, and the outer sleeve is rotated. Due to the threaded pressing action of the outer sleeve and the inner core, the reed is promoted to expand, thereby playing a role in expanding and reducing. After the fracture is reduced, bone can be grafted into the vertebral body through the hollow part of the inner core, which can improve the fracture reduction efficiency and reduce the occurrence of nonunion in the long term.
[0018] The technical solution in the embodiment of the present application for solving the above problems has the following general idea: Embodiment 1
[0019] This embodiment gives the specific structure of a percutaneous vertebral pedicle screw vertebral body reduction and bone grafting device, as Figures 1-4 shown, including a rotating handle 1 and an outer sleeve 2. The rotating handle 1 is in abutting connection with the outer sleeve 2. The inner core 3 penetrates through the inside of the outer sleeve 2, and one end of the inner core 3 extends to the top of the rotating handle 1; Among them, a reed 4 is provided at the bottom end of the outer sleeve 2. The reed 4 is an arc-shaped structure, one end of which is fixed at the bottom end of the outer sleeve 2. It can expand or contract with the relative movement of the outer sleeve 2 and the inner core 3. The outer sleeve 2 is driven to rotate by rotating the rotating handle 1. The threaded pressure of the outer sleeve 2 and the inner core 3 causes the reed 4 to expand to achieve the effect of opening and resetting. Due to the threaded pressure of the outer sleeve 2 and the inner core 3, the reed 4 is expanded under the rotation of the rotating handle 1, thereby playing the role of opening and resetting.
[0020] The outer sleeve 2 is a tubular structure with a frosted surface. A rotating shaft 6 is provided at the contact position between the bottom end of the outer sleeve 2 and the reed 4. When the outer sleeve 2 rotates, the rotation of the rotating shaft 6 can avoid the problem of synchronous rotation of the reed 4. A base 7 is provided at the bottom end of the reed 4, and the base 7 is a hollow structure.
[0021] The inner core 3 is a tubular structure, and the cross-sectional diameter of the inner core 3 is smaller than the cross-sectional diameter of the outer sleeve 2. The reed 4 is an arc-shaped structure, one end of which is fixed to the bottom end of the outer sleeve 2 and can expand or contract with the relative movement of the outer sleeve 2 and the inner core 3.
[0022] A threaded seat 5 is provided inside the outer sleeve 2, and the threaded seat 5 is rotatably connected to the inner core 3. The outer wall of the inner core 3 is provided with a threaded groove, and the inner wall of the hollow part is provided with anti-blocking protrusions or patterns, so that the inner core 3 can rotate with the threaded seat 5 inside the outer sleeve 2.
[0023] The outer wall of the rotating handle 1 is provided with anti-slip stripes. When the rotating handle 1 is rotated, the anti-slip stripes can avoid the problem of sliding. The rotating handle 1 and the inner core 3 are provided with through holes at the corresponding positions, so that the inner core 3 can pass through the inside of the rotating handle 1 and the inside of the outer sleeve 2.
[0024] By adopting the above technical solution: A patient with severe vertebral compression fracture is treated with the bone grafting device of the present invention. The rotating handle 1 of the bone grafting device is in a straight line shape, 10 cm long, and has a non-slip texture on the surface. The outer sleeve 2 is 12 cm long, 7 mm in outer diameter, 1.5 mm in wall thickness, and the front tapered portion is 1 cm long. The inner core 3 is 15 cm long, and the outer diameter is 1.5 mm smaller than the inner diameter of the outer sleeve. The reed 4 is arc-shaped, 4 mm in width, and 0.8 mm in thickness.
[0025] During the operation, the reconstruction bone grafting device is placed in the pre-distraction position, the rotating handle 1 is held and the outer sleeve 2 is slowly rotated to gradually expand the spring 4 to achieve distraction reduction. After the fracture is reduced, the bone grafting operation is performed through the channel with a diameter of 3 mm in the hollow part of the inner core 3 using the matching bone grafting push rod.
[0026] In actual surgical operations, first, the bone grafting device is placed at the pre-distraction position of the vertebral body compression fracture. Then, hold the rotation handle 1 and rotate the outer sleeve 2 so that the outer sleeve 2 and the inner core 3 interact through threads to produce a pressurizing effect, prompting the expansion of the reed 4 to achieve distraction reduction of the fracture. After the fracture reduction is completed, bone material is implanted into the vertebral body through the hollow part of the inner core 3 to complete the bone grafting operation. Embodiment 2
[0027] This embodiment provides a specific structure of a percutaneous pedicle screw vertebral body reduction and bone grafting device for the spine, as Figures 1-4 shown, including a rotation handle 1 and an outer sleeve 2. The rotation handle 1 is in abutting connection with the outer sleeve 2. The inner core 3 penetrates through the inside of the outer sleeve 2, and one end of the inner core 3 extends to the top of the rotation handle 1; Among them, a reed 4 is provided at the bottom end of the outer sleeve 2. The reed 4 is of an arc-shaped structure, and one end of it is fixed to the bottom end of the outer sleeve 2 and can expand or contract with the relative movement of the outer sleeve 2 and the inner core 3. Rotate the rotation handle 1 to drive the outer sleeve 2 to rotate. The threaded pressurization of the outer sleeve 2 and the inner core 3 prompts the expansion of the reed 4 to achieve distraction reduction. Due to the threaded pressurization of the outer sleeve 2 and the inner core 3, the rotation of the rotation handle 1 prompts the expansion of the reed 4, thus playing a role in distraction reduction.
[0028] The outer sleeve 2 is of a tubular structure, and its surface is treated with frosting. A rotation shaft 6 is provided at the contact position between the bottom end of the outer sleeve 2 and the reed 4. In this way, when the outer sleeve 2 rotates, through the rotation of the rotation shaft 6, the problem of synchronous rotation of the reed 4 can be avoided. The bottom end of the reed 4 is provided with a base 7, and the base 7 is of a hollow structure.
[0029] The inner core 3 is of a tubular structure. The cross-sectional diameter of the inner core 3 is smaller than the cross-sectional diameter of the outer sleeve 2. The reed 4 is of an arc-shaped structure, and one end of it is fixed to the bottom end of the outer sleeve 2 and can expand or contract with the relative movement of the outer sleeve 2 and the inner core 3.
[0030] A threaded seat 5 is provided inside the outer sleeve 2. The threaded seat 5 is rotationally connected to the inner core 3. Threaded grooves are provided on the outer wall of the inner core 3, and anti-blocking protrusions or patterns are provided on the inner wall of the hollow part. In this way, the inner core 3 can rotate with the threaded seat 5 inside the outer sleeve 2.
[0031] Anti-slip stripes are provided on the outer wall of the rotation handle 1. When rotating the rotation handle 1, through the setting of the anti-slip stripes, the problem of slipping can be avoided. A through hole is provided at the corresponding position between the rotation handle 1 and the inner core 3. In this way, the inner core 3 can penetrate inside the rotation handle 1 and also penetrate inside the outer sleeve 2.
[0032] By adopting the above technical solutions: Another patient with vertebral compression fracture used this bone grafting device. The rotating handle 1 is L-shaped with a length of 8 cm. The outer sleeve 2 is 10 cm long, with an outer diameter of 6 mm and a wall thickness of 1 mm. The inner core 3 is 12 cm long with a correspondingly matched outer diameter. The reed 4 has a width of 3 mm and a thickness of 0.5 mm.
[0033] During the operation, the bone grafting device was accurately placed. The outer sleeve 2 was rotated to expand the reed 4 to complete the reduction. The diameter of the hollow part of the inner core 3 is 2 mm. The bone material was implanted using the bone grafting pusher rod to promote fracture healing.
[0034] In the actual surgical operation, first, the bone grafting device was placed at the pre-expanded position of the vertebral compression fracture. Then, holding the rotating handle 1, the outer sleeve 2 was rotated so that the outer sleeve 2 and the inner core 3 interacted through the thread to produce a pressurizing effect, prompting the reed 4 to expand and achieving the open reduction of the fracture. After the fracture reduction was completed, the bone material was implanted into the vertebral body through the hollow part of the inner core 3 to complete the bone grafting operation.
[0035] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly illustrating the present invention and are not 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 are still within the protection scope of the present invention.
Claims
1. A spinal percutaneous pedicle screw vertebral body repair bone implant, characterized in that: It comprises a rotating handle (1) and an outer sleeve (2), wherein the rotating handle (1) and the outer sleeve (2) are abuttingly connected, an inner core (3) passes through the inner portion of the outer sleeve (2), and one end of the inner core (3) extends to the top end of the rotating handle (1); A spring leaf (4) is provided at the bottom end of the outer sleeve (2), and the outer sleeve (2) is driven to rotate by rotating the rotary handle (1). The threads of the outer sleeve (2) and the inner core (3) are pressurized to cause the spring leaf (4) to expand and realize expansion and resetting.
2. A spinal percutaneous pedicle screw vertebral body reconstruction bone implant as claimed in claim 1, characterized in that: The outer sleeve (2) is a tubular structure, the surface of which is frosted, and a rotating shaft (6) is provided at the contact position between the bottom end of the outer sleeve (2) and the reed (4).
3. The spinal percutaneous pedicle screw vertebral body reconstruction bone implant as claimed in claim 1, characterized in that: The inner core (3) is a tubular structure, and the cross-sectional diameter of the inner core (3) is smaller than the cross-sectional diameter of the outer sleeve (2).
4. The spinal percutaneous pedicle screw vertebral body reconstruction bone implant as claimed in claim 1, characterized in that: The leaf spring (4) is an arc-shaped structure, one end of which is fixed to the bottom end of the outer sleeve (2) and can expand or contract with the relative movement of the outer sleeve (2) and the inner core (3).
5. The spinal percutaneous pedicle screw vertebral body reconstruction bone implant as claimed in claim 1, characterized in that: The outer wall of the inner core (3) is provided with a thread groove, and the inner wall of the hollow part is provided with anti-blocking protrusions or patterns.
6. The spinal percutaneous pedicle screw vertebral body reconstruction bone implant as claimed in claim 1, characterized in that: A threaded seat (5) is provided inside the outer sleeve (2), and the threaded seat (5) is rotatably connected to the inner core (3).
7. The spinal percutaneous pedicle screw vertebral body reconstruction bone implant as claimed in claim 1, characterized in that: A base (7) is provided at the bottom end of the reed (4), and the base (7) is a hollow structure.
8. The spinal percutaneous pedicle screw vertebral body reconstruction bone implant as claimed in claim 1, characterized in that: The outer wall of the rotating handle (1) is provided with anti-slip stripes, and through holes are provided at corresponding positions of the rotating handle (1) and the inner core (3).