CN209770522U

CN209770522U - Improved U-shaped hollow pedicle screw with solid bolt

Info

Publication number: CN209770522U
Application number: CN201920141631.3U
Authority: CN
Inventors: 刘清平; 郑惠
Original assignee: Mindong Hospital of Ningde City
Current assignee: Mindong Hospital of Ningde City
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2019-12-13
Anticipated expiration: 2029-01-28

Abstract

The utility model discloses an improved U-shaped hollow pedicle screw with a solid bolt, which comprises a U-shaped hollow pedicle screw and a solid bolt; the U-shaped hollow pedicle screw consists of an upper U-shaped body and a lower stud, and the axes of the upper U-shaped body and the lower stud are superposed and form an integral structure; the utility model has the advantages that firstly, the U-shaped hollow pedicle screw is placed in the utility model by the traditional operation method, and then the solid bolt is inserted and passes through the vertebral body and is locked, so that the U-shaped hollow pedicle screw plays a guiding role and obtains more stable vertebral body internal fixation; secondly, the U-shaped hollow pedicle screw and the solid bolt of the utility model are respectively provided with a first locking thread and a second locking thread, so that the solid bolt and the U-shaped hollow pedicle screw can be conveniently locked, and the failure rate of the fixation of the vertebral body is reduced; finally, the utility model discloses a solid is tied and is set up the rupture recess with hollow pedicle of vertebral arch nail of U-shaped, conveniently breaks after solid is tied fixedly, ensures that whole solid is tied and is fixed completely in the centrum, improves the healing degree in centrum later stage.

Description

Improved U-shaped hollow pedicle screw with solid bolt

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a take hollow pedicle of vertebral arch nail of improvement U-shaped of solid bolt.

Background

With the development of medicine, the surgical treatment of thoracolumbar fractures is more and more emphasized, and the treatment of spinal fractures by the pedicle screw technology is one of the clinically accepted effective treatment methods at present. An effective spinal internal fixation system should be good biological, mechanical and reconstructive spinal stability. The strong fixation can reduce the failure of internal fixation objects, the loosening and the breakage of pedicle screws and increase the fusion rate of the spine. However, the traditional open operation of the spine often has a large incision, and the extensive stripping and long-time repeated traction of muscles, muscle fascia and ligaments in the operation process can cause long-term intractable lumbar and back stiffness and pain after the operation. Based on the defects of the traditional operative form, an operative form with small wound and low cost is clinically sought at present. How to reduce the iatrogenic injury in the thoracolumbar vertebra posterior surgery has important clinical significance.

Therefore, the treatment of thoracolumbar fractures with minimally invasive pedicle screws has been the subject of research by many scholars. Many scholars try to use the minimally invasive percutaneous pedicle screw system to treat diseases such as spinal fracture and scoliosis by internal fixation, and a better clinical effect is achieved. The operation mode has the advantages of obviously shortening the operation time, obviously reducing the segment fixation with short bleeding amount in the operation, smaller muscle stripping range, quick recovery of patients after the operation and the like.

At present, two types are used in China: one is the pedicle screw that is used conventionally, which is solid in its pedicle screw portion and requires repeated fluoroscopy due to the absence of guide marks. The other is a minimally invasive percutaneous pedicle screw applied by Chiyonglong and the like, which is difficult to place, hold a rod and the like.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The utility model aims at: the improved U-shaped hollow pedicle screw with the solid bolt overcomes the defect of insufficient strength of the existing long U-shaped hollow pedicle screw suitable for minimally invasive fixation, so that the hollow pedicle screw is changed into the strength close to the solid pedicle screw again, the stability and the strength of a pedicle screw system are obviously improved, the pedicle screw system can resist shearing stress and distortion possibly generated due to instability of a spine, the rigidity of the pedicle screw system is improved, partial structural strain is absorbed, and the occurrence of complications such as internal fixation looseness, bending, fracture and the like is reduced.

2. Technical scheme

in order to realize the purpose, the technical scheme of the utility model is that: an improved U-shaped hollow pedicle screw with a solid bolt comprises a U-shaped hollow pedicle screw and a solid bolt; the U-shaped hollow pedicle screw consists of an upper U-shaped body and a lower stud, the axes of the upper U-shaped body and the lower stud are superposed and form an integral structure, and the U-shaped hollow pedicle screw is provided with a circular through hole along the axis direction; the solid bolt is a metal round rod and is sleeved in the round through hole; the diameter of the stud is gradually reduced along the direction far away from the U-shaped body, self-tapping threads are arranged on the outer peripheral wall of the stud, and first locking threads are arranged on the inner wall of one side, close to the U-shaped body, of the circular through hole; the solid bolt is characterized in that a second locking thread matched with the first locking thread is arranged on the peripheral wall of the solid bolt, a hexagonal bolt head is arranged at one end, close to the second locking thread, of the solid bolt, a first breaking groove is formed in the peripheral wall of the solid bolt, and the first breaking groove is located between the second locking thread and the hexagonal bolt head.

In the improved U-shaped hollow pedicle screw with the solid bolt, the peripheral wall of the U-shaped body is provided with a second breaking groove.

The improved U-shaped hollow pedicle screw with the solid bolt is characterized in that the diameter D of the circular through hole is 2mm, and the diameter D of the solid bolt is 2 mm.

In the improved U-shaped hollow pedicle screw with the solid bolt, one end of the circular through hole, which is close to the first locking thread, is provided with a regular hexagonal groove.

The improved U-shaped hollow pedicle screw with the solid bolt is characterized in that the length of the solid bolt is greater than that of the stud.

The improved U-shaped hollow pedicle screw with the solid bolt is characterized in that the cross section of the regular hexagonal groove is the same as that of the hexagonal bolt head.

3. to sum up the above

To sum up, the beneficial effects of the utility model reside in that:

(1) The utility model puts the U-shaped hollow pedicle screw into the vertebral body by the traditional operation method, and then inserts the solid bolt into the vertebral body to pass through the vertebral body and lock the vertebral body, so that the U-shaped hollow pedicle screw plays a guiding role and obtains more stable vertebral body internal fixation;

(2) The U-shaped hollow pedicle screw and the solid bolt of the utility model are respectively provided with the first locking thread and the second locking thread, so that the solid bolt and the U-shaped hollow pedicle screw can be conveniently locked, and the failure rate of the fixation of the vertebral body is reduced;

(3) The utility model discloses a solid is tied and is set up the rupture recess with hollow pedicle of vertebral arch nail of U-shaped, conveniently breaks after solid tying is fixed, ensures that whole solid ties to fix completely in the centrum, improves the healing degree in centrum later stage.

Drawings

Fig. 1 is a schematic structural view of the improved U-shaped hollow pedicle screw with the solid plug of the present invention.

fig. 2 is a schematic structural view of the improved U-shaped hollow pedicle screw with the solid plug of the utility model.

Fig. 3 is a schematic structural view of the improved U-shaped hollow pedicle screw solid plug with the solid plug of the present invention.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

Referring to fig. 1 and fig. 3, an improved U-shaped hollow pedicle screw with a solid bolt comprises a U-shaped hollow pedicle screw 1 and a solid bolt 2; the U-shaped hollow pedicle screw 1 consists of an upper U-shaped body 101 and a lower stud 102, the axes of the upper U-shaped body and the lower stud are superposed and form an integral structure, and the U-shaped hollow pedicle screw 1 is provided with a circular through hole 103 along the axis direction; the solid bolt 2 is a metal round rod and is sleeved in the round through hole 103; the diameter of the stud 102 is gradually reduced along the direction far away from the U-shaped body 101, self-tapping threads 104 are arranged on the outer peripheral wall of the stud 102, and a first locking thread 105 is arranged on the inner wall of one side, close to the U-shaped body 101, of the circular through hole 103; the peripheral wall of the solid bolt 2 is provided with a second locking thread 201 matched with the first locking thread 105, one end of the solid bolt 2, which is close to the second locking thread 201, is provided with a hexagonal bolt head 202, the peripheral wall of the solid bolt 2 is provided with a first breaking groove 203, and the first breaking groove 203 is positioned between the second locking thread 201 and the hexagonal bolt head 202.

The peripheral wall of the U-shaped body 102 is provided with a second breaking groove, so that after the U-shaped hollow pedicle screw 1 is implanted, the redundant part at the rear end of the U-shaped body 102 is broken conveniently, and the fixity is improved.

Circular through-hole 103 diameter D is 2mm, 2 diameter D are 2mm to the solid, the solid is tied 2 and is just installed in circular through-hole 103, and circular through-hole 103 is to the motion of solid 2 plays good guide effect.

The circular through hole 103 is provided with a regular hexagonal groove 106 at one end close to the first locking thread 105, the size of the cross section of the regular hexagonal groove 106 is the same as that of the cross section of the hexagonal bolt head 202, and the regular hexagonal groove 106 and the hexagonal bolt head 202 can be screwed tightly by a common medical hexagonal wrench.

The using method comprises the following steps: the patient takes in the prone position, puts in the pilot pin under the perspective, and after the perspective position is good, through self tapping screw thread 104 with U-shaped hollow pedicle screw 1 through the guide pin twist, again with solid bolt 2 inserts behind the circular through-hole 103, and through first locking screw thread 105 and second locking screw thread 201 with U-shaped hollow pedicle screw 1 and solid bolt 2 lock, will at last according to the needs of operation length U-shaped hollow pedicle screw 1 and solid bolt 2 break, can reach strong internal fixation.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the content of the present invention or the direct or indirect application attached to the technical field of other related products are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a take hollow pedicle of vertebral arch nail of improvement U-shaped of solid bolt which characterized in that: comprises a U-shaped hollow pedicle screw (1) and a solid bolt (2); the U-shaped hollow pedicle screw (1) consists of an upper U-shaped body (101) and a lower stud (102), the axes of the U-shaped body and the stud are superposed and form an integral structure, and the U-shaped hollow pedicle screw (1) is provided with a circular through hole (103) along the axis direction; the solid bolt (2) is a metal round rod and is sleeved in the round through hole (103); the diameter of the stud (102) is gradually reduced along the direction far away from the U-shaped body (101), self-tapping threads (104) are arranged on the outer peripheral wall of the stud (102), and first locking threads (105) are arranged on the inner wall of one side, close to the U-shaped body (101), of the circular through hole (103); the solid bolt (2) peripheral wall is provided with second locking screw thread (201) with first locking screw thread (105) looks adaptation, solid bolt (2) are close to second locking screw thread (201) one end is provided with hexagonal bolt head (202), first broken recess (203) have been seted up to solid bolt (2) peripheral wall, just first broken recess (203) are located between second locking screw thread (201) and hexagonal bolt head (202).

2. The improved U-shaped hollow pedicle screw with the solid plug as claimed in claim 1, wherein: the peripheral wall of the U-shaped body (101) is provided with a second breaking groove (106).

3. The improved U-shaped hollow pedicle screw with the solid plug as claimed in claim 1, wherein: the diameter D of the circular through hole (103) is 2mm, and the diameter D of the solid bolt (2) is 2 mm.

4. The improved U-shaped hollow pedicle screw with the solid plug as claimed in claim 1, wherein: and a regular hexagonal groove is formed at one end, close to the first locking thread (105), of the circular through hole (103).

5. The improved U-shaped hollow pedicle screw with the solid plug as claimed in claim 4, wherein: the cross section of the regular hexagonal groove is the same as that of the hexagonal bolt head (202).