CN215228276U

CN215228276U - Pedicle of vertebral arch lag screw for Hangman fracture treatment

Info

Publication number: CN215228276U
Application number: CN202121259929.8U
Authority: CN
Inventors: 陈洁; 姜为民
Original assignee: First Affiliated Hospital of Suzhou University
Current assignee: First Affiliated Hospital of Suzhou University
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-12-21
Anticipated expiration: 2031-06-07

Abstract

The utility model discloses a pedicle of vertebral arch lag screw for Hangman fracture treatment, including the screw body, fixed mounting has the screw thread piece on the circumference outer wall of screw body, and the upper end of screw body rotates and installs the connecting sleeve cap, be evenly distributed along the centre of a circle point of screw body on the connecting sleeve cap circumference outer wall and seted up the entry of wearing, and the inner wall threaded connection of connecting sleeve cap has the locking end cap, the inside threaded connection of screw body has set screw, and the inner wall of screw body has seted up movable chamber, the diameter in activity chamber is greater than set screw's external diameter, and the inside in activity chamber is the symmetry and is provided with the expansion piece, the outer wall of two sets of expansion pieces is evenly distributed fixed mounting along vertical direction and has a position pole, be provided with buffer spring on the circumference outer wall of every group position pole, and the end of top position pole extends to the outside of the circumference outer wall of screw body. The utility model discloses in the use, have higher stability, prevent to cause secondary damage to the patient, it is simple to use.

Description

Pedicle of vertebral arch lag screw for Hangman fracture treatment

Technical Field

The utility model relates to a medical treatment auxiliary instrument technical field especially relates to a pedicle of vertebral arch lag screw for Hangman fracture treatment.

Background

Medically, the Hangman fracture is called dentata vertebral arch fracture, which means the fracture occurring in the isthmus of the second cervical vertebral arch, which is commonly seen in people who have used strangulation in the past, and is also called strangulation frame fracture, traumatic dentata vertebral arch fracture, during the treatment, mainly through spinal fusion, the operation needs the use of pedicle lag screws, the lesion vertebral body is taken as the center, the fusion is carried out between the upper vertebral body and the lower vertebral body with the lesion, so that the lesion vertebral body becomes a complete individual, thereby playing a role of treatment, mainly fixing the pedicle lag screw in the vertebral body, but in the fixing process, the pedicle lag screw in the body of the patient shakes along with the walking of the patient, and even secondary damage to the patient is caused, therefore, to solve such problems, we propose a pedicle tension screw for the treatment of Hangman fractures.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects in the prior art and providing a pedicle of vertebral arch lag screw for Hangman fracture treatment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a pedicle of vertebral arch lag screw for Hangman fracture treatment, includes the screw body, fixed mounting has the screw thread piece on the circumference outer wall of screw body, just the upper end of screw body is rotated and is installed the connecting sleeve cap, be evenly distributed along the centre of a circle point of screw body on the connecting sleeve cap circumference outer wall and seted up the mouth of wearing, just the inner wall threaded connection of connecting sleeve cap has the locking end cap, the inside threaded connection of screw body has set screw, just the inner wall of screw body has seted up movable chamber, the diameter in movable chamber is greater than set screw's external diameter, just the inside in movable chamber is the symmetry and is provided with the expansion piece, the outer wall of two sets of expansion piece is evenly distributed along vertical direction and fixed mounting has a top position pole, every group is provided with buffer spring on the circumference outer wall of top position pole, just the end of top position pole extends to the outside of the circumference outer wall of screw body, and the two ends of the buffer spring are fixedly connected with the inner wall of the screw body and the outer wall of the expansion sheet.

Preferably, every the screw body is along the rectangle distribution, every group the inside of entrying is provided with the connection curved bar, and is two sets of the lower extreme of connecting the curved bar is provided with the compact heap, the compact heap upper surface is evenly distributed and is seted up and is connected the constant head tank that the curved bar matches.

Preferably, the top end of the fixing screw rod is provided with a hexagon socket screw hole, and the inside of the locking end cap is provided with a through hole matched with the fixing screw rod.

Preferably, the inner walls of the two groups of the expansion pieces are in an inward inverted circular truncated cone shape.

Preferably, the screw pitch of screw thread piece reduces along the direction from the top down, and the screw pitch of screw thread piece upper end is 1.75mm, the screw pitch at screw thread piece end is 1.25mm, the diameter of screw body is greater than 7mm, just the diameter of screw body bottom is 4 mm.

The utility model provides a pedicle of vertebral arch lag screw for Hangman fracture treatment, beneficial effect lies in: the device is in the use, through the mounting means of combination formula, can satisfy in the treatment process of different pathological change positions, has higher stability simultaneously, and is simple direct in the use.

Drawings

Fig. 1 is a schematic view of the working structure of a pedicle screw for Hangman fracture treatment according to the present invention;

fig. 2 is a sectional view of a pedicle screw for Hangman fracture treatment according to the present invention;

fig. 3 is a split view of the expansion sheet component of the pedicle screw for the treatment of Hangman fracture.

In the figure: 1. connecting a curved bar; 2. locking the end cap; 3. a compression block; 4. positioning a groove; 5. connecting a sleeve cap; 6. a penetration opening; 7. a screw body; 8. a through opening; 9. fixing the screw rod; 10. a movable cavity; 11. a jacking rod; 12. a buffer spring; 13. an expansion sheet; 14. a thread sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-3, a pedicle of vertebral arch lag screw for Hangman fracture treatment, including a screw body 7, a screw thread piece 14 is fixedly installed on the circumferential outer wall of the screw body 7, and a connecting sleeve cap 5 is rotatably installed at the upper end of the screw body 7, penetrating holes 6 are uniformly distributed on the circumferential outer wall of the connecting sleeve cap 5 along the center point of the screw body 7, and the inner wall of the connecting sleeve cap 5 is in threaded connection with a locking end cap 2, a fixing screw 9 is in threaded connection with the inside of the screw body 7, and a movable cavity 10 is formed on the inner wall of the screw body 7, the diameter of the movable cavity 10 is larger than the outer diameter of the fixing screw 9, and expansion pieces 13 are symmetrically arranged inside the movable cavity 10, ejector rods 11 are fixedly installed on the outer walls of the two groups of expansion pieces 13 in uniform distribution along the vertical direction, a buffer spring 12 is arranged on the circumferential outer wall of each group of ejector rods 11, and the tail end of the ejector rods 11 extends to the outer side of the circumferential outer wall of the screw body 7, fixed connection between buffer spring 12's both ends distribution and screw body 7's inner wall and expansion piece 13's outer wall, every screw body 7 distributes along the rectangle, every group wears the inside of mouth 6 and is provided with and connects curved bar 1, the lower extreme of two sets of curved bars 1 of connecting is provided with compact heap 3, the constant head tank 4 that matches with connecting curved bar 1 is offered for evenly distributed on compact heap 3 upper surface, hexagon socket head cap screw hole has been seted up on fixing screw 9's top, through-hole 8 that matches with fixing screw 9 is seted up to locking end cap 2's inside, the inner wall of two sets of expansion pieces 13 is the radius platform form to the inboard, the pitch of screw thread piece 14 reduces along from the top down direction, and the pitch of screw thread piece 14 upper end is 1.75mm, the terminal pitch of screw thread piece 14 is 1.25mm, the diameter of screw body 7 is greater than 7mm, and the diameter of screw body 7 bottom is 4 mm.

In the utility model, in the using process, firstly, the lesion part of the patient is confirmed, then the centrums at the upper and lower sides of the lesion part are selected, after the installation position is confirmed, the corresponding cavity is drilled at the upper and lower centrums, and the screw body 7 is rotated until the screw body is deep into the cavity;

in the process of drilling into the cavity, because the thread pitch of the arranged thread pieces 14 is gradually reduced from top to bottom, the pressurizing amplitude is limited, then the fixing screw 9 is rotated through the through hole 8, the fixing screw 9 moves downwards until the fixing screw 9 abuts against the expansion piece 13 to move outwards, each jacking rod 11 moves outwards, and the function of fixing the screw body 7 is achieved in the vertebral body;

after fixing every screw body 7 in proper order, pass in penetrating mouth 6 and connect curved bar 1 to place compact heap 3 and act on pathological change department, rotate locking end cap 2, fix in the inside of connecting sleeve cap 5 and connect curved bar 1, thereby support patient's pathological change department, prevent the problem of deformation, simple to use.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The pedicle of vertebral arch lag screw for Hangman fracture treatment comprises a screw body (7) and is characterized in that a threaded sheet (14) is fixedly arranged on the outer wall of the circumference of the screw body (7), a connecting sleeve cap (5) is rotatably arranged at the upper end of the screw body (7), penetrating ports (6) are uniformly distributed on the outer wall of the circumference of the connecting sleeve cap (5) along the center point of the screw body (7), a locking end cap (2) is connected to the inner wall of the connecting sleeve cap (5) in a threaded manner, a fixing screw (9) is connected to the inner wall of the screw body (7) in a threaded manner, a movable cavity (10) is formed in the inner wall of the screw body (7), the diameter of the movable cavity (10) is larger than the outer diameter of the fixing screw (9), expansion sheets (13) are symmetrically arranged in the movable cavity (10), and jacking rods (11) are fixedly arranged on the outer wall of the expansion sheets (13) in a uniformly distributed manner along the vertical direction, every group be provided with buffer spring (12) on the circumference outer wall of top position pole (11), just the end of top position pole (11) extends to the outside of the circumference outer wall of screw body (7), fixed connection between the both ends distribution of buffer spring (12) and the inner wall of screw body (7) and the outer wall of expansion piece (13).

2. The pedicle tension screw for Hangman fracture treatment according to claim 1, wherein each screw body (7) is distributed along a rectangle, a connecting curved rod (1) is arranged inside each penetrating port (6), two groups of connecting curved rods (1) are provided with compression blocks (3) at the lower ends thereof, and positioning grooves (4) matched with the connecting curved rods (1) are uniformly distributed on the upper surface of each compression block (3).

3. The pedicle screw for Hangman fracture treatment according to claim 1, wherein the top end of the fixing screw rod (9) is provided with a hexagon socket head cap screw hole, and the locking end cap (2) is internally provided with a through hole (8) matched with the fixing screw rod (9).

4. The pedicle screw for the treatment of Hangman fractures according to claim 1, wherein the inner walls of the two sets of expansion tabs (13) are in the shape of an inwardly rounded truncated cone.

5. The pedicle screw for Hangman fracture treatment as claimed in claim 1, wherein the thread pitch of the thread plate (14) decreases in the direction from top to bottom, and the thread pitch of the upper end of the thread plate (14) is 1.75mm, the thread pitch of the tip of the thread plate (14) is 1.25mm, the diameter of the screw body (7) is greater than 7mm, and the diameter of the bottom end of the screw body (7) is 4 mm.