CN209996462U

CN209996462U - Extension component of pedicle screws

Info

Publication number: CN209996462U
Application number: CN201920559374.5U
Authority: CN
Inventors: 冯兰瑞; 鲍野; 刘三
Original assignee: Tianjin Zhengtian Medical Instrument Co Ltd
Current assignee: Tianjin Zhengtian Medical Instrument Co Ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-01-31
Anticipated expiration: 2029-04-23

Abstract

The utility model discloses an extension module of pedicle of vertebral arch screw relates to medical instrument technical field this extension module of pedicle of vertebral arch screw is made by macromolecular material, including the adapter sleeve, its cover is established on the head of a nail of pedicle of vertebral arch screw, two tails, its with the shaping of the connecting sleeve body, and the symmetry sets up the adapter sleeve is kept away from the end of the nail body of pedicle of vertebral arch screw, fracture opening, its setting is in the adapter sleeve is kept away from the end of tail, and is the acute angle shape, and with two the plane of symmetry of tail sets up the utility model is used for with the cooperation of pedicle of vertebral arch screw, and extension module adopts macromolecular material to make, and production quality is stable, and is fast, and is with low costs simultaneously, sets up the fracture opening on the adapter sleeve, and extension module can tear fast at the fracture opening part to can more conveniently demolish extension module.

Description

Extension component of pedicle screws

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to extension subassembly of kinds of pedicle of vertebral arch screws.

Background

The spine internal fixation system is generally adopted for treating spinal injuries, orthopedic treatment, reduction and the like in clinic, general stripping of bilateral paravertebral soft tissues in the spine internal fixation system operation often causes large trauma and much bleeding, and muscle atrophy is often caused by muscle loss and nerve innervation, related complications are easy to occur due to large trauma of human tissues caused by open surgery and more instruments, so in order to reduce tissue trauma and related complications, pedicle minimally invasive surgery is adopted for treating related diseases in the prior art, in order to avoid difficulty in matching with surgical instruments and operation difficulty caused by the minimally invasive surgery, an extension component is installed on a pedicle screw and is matched with the surgical instruments through the extension component, and operation is simplified, but the extension component in the prior art is made of an alloy arranged with a pedicle screw body, so that the cost is increased, or the extension component made of a high polymer material is sleeved on a screw cap of the pedicle screw, so that the extension component is difficult to be removed after surgery.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide kinds of pedicle screw's extension subassembly to extension subassembly is with high costs and demolish the problem of difficulty among the solution prior art.

To achieve the purpose, the utility model adopts the following technical proposal:

A pedicle screw extension assembly, the extension assembly being made of a polymeric material, comprising:

the connecting sleeve can be sleeved on the screw cap of the pedicle screw;

the two tail pieces are integrally formed with the connecting sleeve and are symmetrically arranged at the end of the connecting sleeve, which is far away from the nail body of the pedicle screw;

and the fracture opening is arranged at the end of the connecting sleeve, which is far away from the tail piece, is in an acute angle shape, and is symmetrically arranged on the symmetrical surfaces of the two tail pieces.

is the preferable proposal of the lengthening component of the pedicle screw, the fracture openings are two and are arranged symmetrically with each other.

preferred versions of the above pedicle screw extension assembly, the opening angle of the fracture opening ranges from 10 degrees to 30 degrees.

preferable proposals as the extension component of the pedicle screw are that the tail piece is provided with a plurality of round holes, and the round holes are arranged along the length direction of the tail piece.

is the preferable proposal of the extension component of the pedicle screw, the round holes are arranged at equal intervals along the length direction of the tail piece.

, which is a preferred version of the pedicle screw extension assembly described above, the round hole is provided with turns of reinforcing protrusions around the end on the outer surface of the caudal plate.

preferred options for the extension component of the pedicle screw are that the reinforcing protrusion, the connecting sleeve and the tail piece are integrally formed.

As preferred proposals of the extension component of the pedicle screw, the outer side surface of the tail piece and the outer wall of the connecting sleeve at the side of the tail piece are in the same arc surfaces.

is the preferable proposal of the extension component of the pedicle screw, the end of the connecting sleeve near the tail piece is provided with two opposite U-shaped slots, and the edges of the two slots can be respectively aligned with the edges of the two U-shaped connecting slots on the screw cap of the pedicle screw.

As preferred proposals of the extension component of the pedicle screw, the inner surface of the end of the connecting sleeve, which is far away from the tail piece, is provided with an inner spherical surface, and the inner spherical surface can be jointed with the spherical surface of the screw cap.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides an extension subassembly of kinds of pedicle of vertebral arch screws for use with the cooperation of pedicle of vertebral arch screws, the extension subassembly adopts macromolecular material to make, and production quality is stable, and is fast, and is with low costs simultaneously, sets up the fracture opening on the link sleeve, and the extension subassembly can be torn fast at the fracture opening part to can conveniently demolish the extension subassembly more.

Drawings

FIG. 1 is a schematic view of the extension assembly of the pedicle screw of the present invention in use with a pedicle screw;

FIG. 2 is a schematic structural view of the extension assembly of the pedicle screw of the invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of angles of the pedicle screw of the invention;

fig. 5 is another degrees of the pedicle screw of the invention.

Wherein:

1 connecting sleeve 2 tail sheet

3 connecting rod 4 pedicle screw

11 slotted 12 break open

13 inner spherical surface

21 round hole 22 reinforcing projection

41 nail body and 42 nail cap

Spherical surface 43 and spherical surface 44 connect the grooves.

Detailed Description

The extension component of the pedicle screw of the invention is described in detail below with reference to the drawings and embodiments of the specification.

The utility model discloses a pedicle screw's extension subassembly is used for using with 4 cooperations of pedicle screw. As shown in fig. 4 and 5, the pedicle screw 4 comprises a screw body 41 and a screw cap 42, wherein the screw cap 42 forms a spherical surface 43 near the transition of the end surface of the screw body 41 to the side wall of the screw cap 42. The spike cap 42 has a symmetrically disposed U-shaped attachment slot 44 formed in the outer wall thereof. After implantation of the pedicle screw 4, the connecting rod 3 is inserted into the connecting slot 44.

As shown in fig. 1-3, the extension component of the pedicle screw comprises a connecting sleeve 1, two tail pieces 2 and a fracture opening 12.

In the embodiment, the connecting sleeve 1 can be sleeved on the nail cap 42 of the pedicle screw 4, specifically, the connecting sleeve 1 is provided with a central hole, the end of the connecting sleeve 1 close to the tail piece 2 is provided with two opposite U-shaped slots 11, the edges of the two slots 11 can be aligned with the edges of the two U-shaped connecting grooves 44 on the nail cap 42 of the pedicle screw 4, the inner surface of the connecting sleeve 1 far away from the end of the tail piece 2 is provided with an inner spherical surface 13, the inner spherical surface 13 can be attached to the spherical surface 43 of the nail cap 42, when the nail body 41 passes through the central hole of the connecting sleeve 1 during minimally invasive surgery, the inner surface of the connecting sleeve 1 is attached to the outer surface of the nail cap 42, and the edges of the two slots 11 are aligned with the edges of the two U-shaped connecting.

The two tail pieces 2 are integrally formed with the connecting sleeve 1 and are symmetrically arranged at the end of the connecting sleeve 1 far away from the nail body 41 of the pedicle screw 4.

The fracture opening 12 is arranged at the end of the connecting sleeve 1 far away from the tail piece 2 and is in an acute angle shape, and the fracture opening 12 is symmetrically arranged with the symmetrical plane of the two tail pieces 2.

In this embodiment, when the extension assembly on the nut 42 of the pedicle screw 4 needs to be removed after the operation, because the acute-angle-shaped fracture opening 12 is arranged on the extension assembly, when the operator forcibly pulls the tail piece 2 outwards, the extension assembly can be quickly torn at the fracture opening 12, so that the extension assembly can be more conveniently removed. In addition, the extension assembly is made of a polymer material, and the cost can be reduced compared with the extension assembly made of alloy.

In this embodiment, as shown in fig. 1 and 3, the two fracture openings 12 are symmetrically arranged, so that the two fracture openings 12 are respectively arranged on two opposite spacing areas of the two tail pieces 2, when the extension assembly is disassembled, the two opposite spacing areas are torn, and thus the extension assembly forms two unconnected structures, so that the extension assembly is not required to be integrally taken out at the same time, and the disassembly is more convenient and flexible.

In the present embodiment, the opening angle range of the fracture opening 12 is 10 ° -30 °, for example, 12 °, 15 °, 18 °, 20 °, 23 °, 25 °, or 28 °. The opening angle at the fracture opening 12 is smaller, so that the fracture opening 12 is easier to tear and is easier to remove.

In the embodiment, the tail piece 2 is an arc-shaped plate, and the outer side surface of the tail piece 2 and the outer wall of the connecting sleeve 1 on the side where the tail piece is located are in the same arc surfaces.

The tail piece 2 is provided with a plurality of round holes 21, and the round holes 21 are arranged along the length direction of the tail piece 2. The circular holes 21 are arranged at equal intervals along the length direction of the tail piece. This round hole 21 can cooperate with surgical instruments, and surgical instruments inserts and realizes implanting pedicle of vertebral arch screw 4 in the round hole 21, and surgical instruments carries out the nail planting operation through the round hole 21 cooperation with tail piece 2 in human outside, can not produce great wound on human tissue.

In the embodiment, as shown in fig. 3, circles of reinforcing protrusions 22 are arranged on the round hole 21 around the end on the outer surface of the tail piece 2, the reinforcing protrusions 22 increase the strength of the periphery of the round hole 21, so that lifting, resetting and opening can be met during minimally invasive surgery, the fracture opening 12 of the extension assembly can be torn after the surgery is finished, meanwhile, the tail piece 2 can be effectively prevented from being cracked at the edge of the round hole 21, and the surgery can be smoothly completed.

In this embodiment, strengthen protruding 22, adapter sleeve 1 and the shaping of the 2 body of tail piece, the shaping is convenient, can effectively reduce cost to guarantee that the extension module has good performance.

The utility model discloses well pedicle of vertebral arch screw's extension subassembly is when using, mainly includes following step:

firstly, combining and assembling the extension component and the pedicle screw 4; then the tail piece 2 of the extension component is clamped into the round hole 21 of the tail piece 2 through a surgical instrument, and nailing and fixing are carried out; finally, when the operation is finished, the tail piece 2 of the extension component is pulled up and penetrated in the round hole 21 through a surgical instrument, and meanwhile, the end face, far away from the nail body 41, of the nail cap 42 of the pedicle screw 4 is propped against, so that the connecting sleeve 1 of the extension component is broken from the broken opening 12 of the connecting sleeve 1 by taking the connecting rod 3 as a fulcrum, the extension component is separated into two parts, and the extension component can be taken down.

The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.

Claims

1, kinds of pedicle screw extension components, wherein the extension components are made of high polymer materials, including:

the connecting sleeve (1) can be sleeved on a screw cap (42) of the pedicle screw (4);

the two tail pieces (2) are integrally formed with the connecting sleeve (1) and are symmetrically arranged at the end of the connecting sleeve (1) far away from the nail body (41) of the pedicle screw (4);

the fracture opening (12) is arranged at the end of the connecting sleeve (1) far away from the tail piece (2), is in an acute angle shape, and is symmetrically arranged on the symmetrical surfaces of the two tail pieces (2).

2. The pedicle screw extension assembly according to claim 1, wherein: the two fracture openings (12) are symmetrically arranged.

3. The pedicle screw extension assembly according to claim 1, wherein: the opening angle range of the fracture opening (12) is 10-30 degrees.

4. The pedicle screw extension assembly according to claim 1, wherein: the tail piece (2) is provided with a plurality of round holes (21), and the round holes (21) are arranged along the length direction of the tail piece (2).

5. The pedicle screw extension assembly according to claim 4, wherein: the round holes (21) are arranged at equal intervals along the length direction of the tail piece (2).

6. The pedicle screw extension assembly according to claim 4, wherein the circular hole (21) is provided with turns of the reinforcing protrusion (22) around the end on the outer surface of the tail piece (2).

7. The pedicle screw extension assembly according to claim 6, wherein the reinforcement protrusion (22), the connection sleeve (1) and the tail piece (2) are integrally formed.

8. The extension component of the pedicle screw as claimed in claim 1, wherein the outer side surface of the tail piece (2) and the outer wall of the connecting sleeve (1) on the side of the tail piece are in the same arc surfaces.

9. The extension component of the pedicle screw as claimed in claim 1, wherein the connecting sleeve (1) is provided with two opposite U-shaped slots (11) near the end of the tail piece (2), and the edges of the two slots (11) can be respectively aligned with the edges of the two U-shaped connecting slots (44) on the screw cap (42) of the pedicle screw (4).

10. The extension component of the pedicle screw as claimed in claim 1, wherein the inner surface of the connecting sleeve (1) at the end away from the tail piece (2) is provided with an inner spherical surface (13), and the inner spherical surface (13) can be jointed with the spherical surface (43) of the screw cap (42).