CN219306894U - Minimally invasive spine posterior internal fixation pedicle screw - Google Patents
Minimally invasive spine posterior internal fixation pedicle screw Download PDFInfo
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- CN219306894U CN219306894U CN202222527524.9U CN202222527524U CN219306894U CN 219306894 U CN219306894 U CN 219306894U CN 202222527524 U CN202222527524 U CN 202222527524U CN 219306894 U CN219306894 U CN 219306894U
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- pedicle screw
- pedicle
- screw
- minimally invasive
- internal fixation
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Abstract
The utility model discloses a minimally invasive spine posterior internal fixation pedicle screw which comprises pedicle screw heads, wherein the top ends of the pedicle screw heads are provided with spherical heads, two sides of the top ends of pedicle screw seats are respectively provided with pedicle screw tails, locking nuts are arranged in the pedicle screw seats, the bottom ends of the two pedicle screw tails are respectively provided with a clamping assembly, and two sides of the top of each pedicle screw seat are respectively provided with an L-shaped groove; according to the utility model, by means of the design of the clamping assembly and the pedicle screw seat, before the tool is used for fastening and installing the pedicle screw head, the clamping block is clamped in the L-shaped groove before the locking nut is rotated, so that the screw tail is connected with the screw seat, the locking nut can be installed into the screw seat from outside a patient body, then the screw tail is rotated for disassembly, when the pedicle screw is required to be disassembled for rehabilitation of the patient, the screw tail is connected with the screw seat, the nut is rotated out of the patient body from the pedicle screw seat, and the locking nut is prevented from falling into a wound of the patient.
Description
Technical Field
The utility model relates to the technical field of spinal surgical instruments, in particular to a minimally invasive posterior internal fixation pedicle screw for spinal column.
Background
In the clinic, an internal fixation system of the spine is generally used for treating spine injury, orthopedic, reduction and the like, and pedicle screws are fastened through an extension assembly in the prior art when the pedicle screws are used for minimally invasive surgery.
But after the pedicle screw is installed for the first time, the extension assembly is broken off with the fingers and thumb through the instrument, accomplishes the installation of pedicle screw, and when the patient needs to dismantle the pedicle screw after a period of time, the locking nut is because of the reason of installation connecting rod to the rotation distance of nut at pedicle screw seat shortens, when the nut is unscrewed easily, drops to backbone opening part, causes unnecessary infection to the wound easily.
Disclosure of Invention
The utility model aims to provide a minimally invasive posterior internal fixation pedicle screw for the spine, so as to solve the problems in the background art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a minimally invasive posterior internal fixation pedicle screw for spinal column, which comprises,
the pedicle screw head is provided with a ball head part at the top end;
pedicle screw bases, wherein pedicle screw tails are respectively arranged at two sides of the top end of the pedicle screw base;
the locking nut is arranged in the pedicle screw base;
circular grooves are formed in the pedicle screw bases, clamping and fixing assemblies are respectively arranged at the bottom ends of two pedicle screw tails, and L-shaped grooves are respectively formed in two sides of the top of the pedicle screw base;
the two clamping and fixing assemblies respectively comprise a connecting block and a clamping and fixing block.
Preferably, the top end of the pedicle screw head is fixedly connected with the bottom end of the ball head part, a spherical groove is formed in the bottom of the pedicle screw seat, and the ball head part is clamped in the spherical groove.
Preferably, the front and back of the pedicle screw base are respectively provided with a strip groove, the inner wall of the circular groove is provided with a first thread, the outer wall of the locking nut is provided with a second thread, and the first thread is meshed with the second thread.
Preferably, one side of the top ends of the two clamping blocks is fixedly connected with the bottom ends of the two connecting blocks respectively, and the top ends of the two connecting blocks are fixedly connected with the bottom ends of the two pedicle screw tails respectively.
Preferably, the two clamping blocks are respectively clamped in the two L-shaped grooves, and the inner walls of the two pedicle screw tails are respectively provided with third threads.
The utility model has the technical effects and advantages that:
according to the utility model, by means of the design of the clamping assembly and the pedicle screw seat, before the tool is used for fastening and installing the pedicle screw head, the clamping block is clamped in the L-shaped groove before the locking nut is rotated, so that the pedicle screw tail is connected with the pedicle screw seat, the locking nut can be installed into the pedicle screw seat from outside a patient, then the pedicle screw tail is rotated for disassembly, when the pedicle screw is required to be disassembled for rehabilitation of the patient, the pedicle screw tail is installed in the L-shaped groove through the connecting block and the clamping block, the locking nut is rotated out of the patient from the pedicle screw seat, and the locking nut is prevented from falling into a wound of the patient.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model.
Fig. 2 is a schematic cross-sectional elevation view of the present utility model.
Fig. 3 is an enlarged schematic view of fig. 2 a according to the present utility model.
Fig. 4 is a schematic view of the connection structure of the clamping assembly and the pedicle screw base according to the utility model.
In the figure: 1. pedicle heads; 2. a ball head portion; 3. a pedicle screw seat; 4. pedicle screw tails; 5. a lock nut; 6. a connecting block; 7. and (5) clamping and fixing the block.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The present utility model provides a minimally invasive posterior internal fixation pedicle screw as shown in fig. 1-4, comprising,
the pedicle screw head 1, the top end of the pedicle screw head 1 is provided with a ball head part 2;
the locking nut 5 is arranged inside the pedicle screw base 3;
circular grooves are formed in the pedicle screw bases 3, clamping components are respectively arranged at the bottom ends of the two pedicle screw tails 4, and L-shaped grooves are respectively formed in two sides of the top of the pedicle screw bases 3;
the two clamping components respectively comprise a connecting block 6 and a clamping block 7.
The top of pedicle of vertebral arch pin head 1 and the bottom fixed connection of bulb portion 2, the ball groove has been seted up to the bottom of pedicle of vertebral arch pin seat 3, and bulb portion 2 joint is in spherical inslot, and the screw thread has been seted up to the outer wall of pedicle of vertebral arch pin head 1, and bulb portion 2 is whole to a spheroid, but the horizontal cutting of sphere top quarter department, and the circular slot has been seted up at bulb portion 2 middle part, and the screw thread is seted up to the circular slot inner wall, through instrument and circular slot meshing, installs pedicle of vertebral arch pin head 1 in the trompil of backbone.
The front and the back of pedicle of vertebral arch nail seat 3 have offered rectangular groove respectively, and first screw thread has been seted up to the inner wall in circular groove, and the second screw thread has been seted up to the outer wall of lock nut 5, first screw thread and second screw thread meshing, and two clamping blocks 7 joint respectively in two L inslot, and the third screw thread has been seted up respectively to the inner wall of two pedicle of vertebral arch nail tails 4, and one side on two clamping blocks 7 tops respectively with the bottom fixed connection of two connecting blocks 6, the top of two connecting blocks 6 respectively with the bottom fixed connection of two pedicle of vertebral arch nail tails 4.
The bottom of rectangular groove is convex, and rectangular groove is used for placing the connective bar, and the arc length of pedicle of vertebral arch nail tail 4 is the same with pedicle of vertebral arch nail seat 3's top arc length, and locking nut 4 second screw thread meshes with first screw thread and third screw thread, and the open-ended in L shape groove is on pedicle of vertebral arch nail seat 3's top, and the opening size is the 1.05 times of block 7 size, and the length of L shape groove bottom is the 1.5 times of block 7 size, and the size of connecting block 6 bottom is the 0.5 times of block 7 top size.
The working principle of the utility model is as follows:
when a user uses the device, the pedicle screw base 3 and the pedicle screw tail 4 are required to be connected, the clamping block 7 at the bottom end of the pedicle screw tail 4 is clamped into the L-shaped groove at the top of the pedicle screw base 3, after the clamping block 7 enters the L-shaped groove, the pedicle screw tail 4 is rotated anticlockwise, the pedicle screw tail 4 drives the connecting block 6 to synchronously move, the connecting block 6 drives the clamping block 7 to synchronously move, and the clamping block 7 is clamped into the bottom of the L-shaped groove, so that the pedicle screw tail 4 cannot be pulled out from the top of the pedicle screw base 3;
at the moment, the pedicle screw head 1 is screwed into a spine hole through a tool, a connecting rod is arranged at the top of the pedicle screw seat 3, then the locking nut 5 is rotated to enter the inside of the pedicle screw seat 4 through the first thread and the third thread of the pedicle screw seat 3 and the pedicle screw tail 4, the locking nut 5 is fixed in the pedicle screw seat 3 through the pedicle screw tail 4, after the connecting rod is arranged, the two pedicle screw tails 4 at the top of the pedicle screw seat 3 are rotated clockwise, the pedicle screw tail 4 is pulled in the direction away from the pedicle screw seat 3, and the pedicle screw 4 can be detached, so that the installation of the pedicle screw is completed;
when the pedicle screw is required to be disassembled by a patient, the two pedicle screw tails 4 are arranged in the two L-shaped grooves at the top of the pedicle screw seat 3, the locking nut 5 is rotated through the knob tool, and the locking nut 5 is rotated out of the patient through the pedicle screw seat 3 and the pedicle screw tails 4. Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (5)
1. A minimally invasive posterior internal fixation pedicle screw for spinal column, which comprises,
the pedicle screw comprises a pedicle screw head (1), wherein a ball head part (2) is arranged at the top end of the pedicle screw head (1);
the pedicle screw base (3), two sides of the top end of the pedicle screw base (3) are respectively provided with a pedicle screw tail (4);
the locking nut (5) is arranged in the pedicle screw base (3);
the method is characterized in that: circular grooves are formed in the pedicle screw bases (3), clamping components are respectively arranged at the bottom ends of the two pedicle screw tails (4), and L-shaped grooves are respectively formed in two sides of the top of the pedicle screw bases (3);
the two clamping and fixing assemblies respectively comprise a connecting block (6) and a clamping and fixing block (7).
2. The minimally invasive posterior internal fixation pedicle screw of the spinal column according to claim 1, wherein the top end of the pedicle screw head (1) is fixedly connected with the bottom end of the ball head part (2), a spherical groove is formed in the bottom of the pedicle screw seat (3), and the ball head part (2) is clamped in the spherical groove.
3. The minimally invasive posterior internal fixation pedicle screw of the spine according to claim 1, characterized in that the front and the back of the pedicle screw base (3) are respectively provided with a strip groove, the inner wall of the circular groove is provided with a first thread, the outer wall of the locking nut (5) is provided with a second thread, and the first thread is meshed with the second thread.
4. The minimally invasive posterior internal fixation pedicle screw according to claim 1, wherein one side of the top ends of the two clamping blocks (7) is fixedly connected with the bottom ends of the two connecting blocks (6), and the top ends of the two connecting blocks (6) are fixedly connected with the bottom ends of the two pedicle screw tails (4).
5. The minimally invasive posterior internal fixation pedicle screw according to claim 1, wherein the two clamping blocks (7) are respectively clamped in the two L-shaped grooves, and the inner walls of the two pedicle screw tails (4) are respectively provided with third threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222527524.9U CN219306894U (en) | 2022-09-23 | 2022-09-23 | Minimally invasive spine posterior internal fixation pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222527524.9U CN219306894U (en) | 2022-09-23 | 2022-09-23 | Minimally invasive spine posterior internal fixation pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219306894U true CN219306894U (en) | 2023-07-07 |
Family
ID=87003738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222527524.9U Active CN219306894U (en) | 2022-09-23 | 2022-09-23 | Minimally invasive spine posterior internal fixation pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219306894U (en) |
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2022
- 2022-09-23 CN CN202222527524.9U patent/CN219306894U/en active Active
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