CN211066969U

CN211066969U - Pedicle screw

Info

Publication number: CN211066969U
Application number: CN201921334625.6U
Authority: CN
Inventors: 朱安礼; 谷传卫; 陈晓宇; 卢小贵
Original assignee: SUZHOU GEMMED MEDICAL INSTRUMENT CO Ltd
Current assignee: SUZHOU GEMMED MEDICAL INSTRUMENT CO Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-07-24
Anticipated expiration: 2029-08-16

Abstract

The utility model provides a pedicle screw, which comprises a pedicle screw body, a sighting bracket, a guide tube and a locking cross screw, wherein the pedicle screw body comprises a head part and a screw rod, the head part comprises two opposite vertical plates, and the screw rod is provided with an oblique angle hole matched with the locking cross screw; the aiming support comprises a supporting rod and a guide rod which are vertically connected with each other, two clamping grooves matched with a vertical plate are formed in two sides of one end of the supporting rod, the guide rod is fixedly connected with the side face of the supporting rod close to the other end of the supporting rod, a round hole aligned to an oblique angle hole is formed in the top of the guide rod, the round hole is coaxial with the oblique angle hole, one end of the guide tube penetrates through the round hole and is right opposite to the oblique angle hole, a through hollow cavity is formed between two ends of the guide tube, and the hollow cavity is matched with. The utility model aims at providing a pedicle screw increases a piece of locking cross screw, and operation easy operation is fixed more firmly reliable, and the operation phase is painful lighter, can be early carry out the function exercise.

Description

Pedicle screw

Technical Field

The utility model relates to a backbone internal fixation machinery technical field, concretely relates to pedicle screw.

Background

Since Boucher proposed internal fixation via pedicle screws in 1959, since it was effective in providing three-column fixation of the spine, it has been widely used in spinal surgery for various diseases including spinal fractures, degenerative diseases, tumors, tuberculosis, etc., however, loosening and removal of screws is common in patients with osteoporosis. Aiming at the loosening and extraction of the screw, Santoni is equivalent to 2009 which proposes a cortical bone trajectory screw technology (CBT), and compared with the traditional pedicle screw, the CBT has the characteristics of large extraction resistance force, small wound and the like, so the pedicle screw is widely applied to clinic; however, there is still a situation where the screw is loosened and extracted for patients with severe osteoporosis in clinical work, and for this reason, a fixing system having a stronger extraction resistance is required.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pedicle of vertebral arch nail increases a piece of locking cross screw, and operation easy operation is fixed more firmly reliable, for the fusion technique provides a better fusion condition between the way of escape lumbar vertebrae body, and the operation phase is painful lighter, can be early carry out the function exercise.

The utility model provides a following technical scheme:

a pedicle screw comprises a sighting bracket, a guide tube and a locking cross screw, wherein the pedicle screw body comprises a head part and a screw rod, the head part comprises two opposite vertical plates, and the screw rod is provided with an oblique angle hole matched with the locking cross screw;

aiming support includes bracing piece and the guide bar that mutually perpendicular connected, the one end both sides of bracing piece be equipped with two with the draw-in groove that vertical board matches, the guide bar with the bracing piece is close to the side fixed connection of the other end, the top of guide bar is equipped with the alignment the round hole in bevel hole, the round hole with bevel hole is coaxial, the one end of stand pipe is passed the round hole and with bevel hole is just right, be equipped with the well cavity that runs through between the both ends of stand pipe, well cavity with locking cross screw matches.

Preferably, a handle is arranged at one end of the guide pipe, which is arranged at the top of the guide rod.

Preferably, a lantern ring is arranged on the handle, and the handle is fixedly sleeved on the guide pipe through the lantern ring.

Preferably, the two vertical plates are arc-shaped plates.

Preferably, one end of the guide rod is embedded in the support rod.

Preferably, the supporting rod is connected with the head portion through the clamping groove in a tight fit mode with the vertical plate.

The utility model has the advantages that: compared with the traditional screw technology, one locking cross screw is added, so that the axial extraction force in the vertebral body is greatly increased; the locking cross screw is added, so that the operation is simple, the fixation is firmer and more reliable, a better fusion condition is provided for posterior lumbar interbody fusion, the pain in the operation period is less, and the function exercise can be performed in the early stage; in the technology, two screws are fixed in a crossed manner, so that the holding force of the screws is enhanced, and the bone fracture plate has more advantages in patients with osteoporosis; the technique has better early postoperative fixing strength.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a front view of the present invention;

fig. 3 is a first schematic view of the implantation of the present invention;

fig. 4 is a second schematic view of the implantation of the present invention;

labeled as: 1. a pedicle screw body; 2. a guide tube; 3. locking the cross screw; 4. a head portion; 5. a screw; 6. a vertical plate; 7. a card slot; 8. an aiming stand; 9. a support bar; 10. a guide bar; 11. a handle; 12. and (4) oblique angle holes.

Detailed Description

As shown in fig. 1-2, a pedicle screw comprises a pedicle screw body 1, a aiming bracket 8, a guide tube 2 and a locking cross screw 3, wherein the pedicle screw body 1 comprises a head 4 and a screw rod 5, the head 4 comprises two opposite vertical plates 6, the two vertical plates 6 are arc-shaped plates, and the screw rod 5 is provided with an oblique hole 12 matched with the locking cross screw 3 for implanting the locking cross screw 3;

the aiming support 8 comprises a support rod 9 and a guide rod 10 which are vertically connected with each other, two clamping grooves 7 matched with the vertical plate 6 are formed in two sides of one end of the support rod 9, and the support rod 9 and the head 4 are connected with the vertical plate 6 through the clamping grooves 7 in a tight fit mode and are convenient to mount and dismount;

the guide rod 10 is fixedly connected with the side face, close to the other end, of the support rod 9, specifically, one end of the guide rod 10 is embedded in the support rod 9, a round hole aligned with the oblique angle hole 12 is formed in the top of the guide rod 10, the round hole is coaxial with the oblique angle hole 12, one end of the guide tube 2 penetrates through the round hole and is right opposite to the oblique angle hole 12, it is effectively guaranteed that the locking cross screw 3 can accurately enter the oblique angle hole 12, a penetrating hollow cavity is formed between the two ends of the guide tube 2, and the hollow cavity is matched with the locking cross screw 3;

wherein, the one end that the guide tube 2 was located the guide bar 10 top is equipped with handle 11, is holding up when punching and implanting locking cross screw 3 and is playing stabilizing effect, is equipped with the lantern ring on handle 11, and handle 11 is located on guide tube 2 through the lantern ring is fixed ground cover.

As shown in fig. 1-4, when a pedicle screw is implanted, the support rod 9 is coaxial with the pedicle screw body 1 so as to position the implantation position of the pedicle screw body 1, the pedicle screw body 1 is implanted into a corresponding bone, the locking cross screw 3 is implanted into the oblique angle hole 12 on the screw rod 5 along the hollow cavity of the guide tube 2, and then the support rod 9 is detached from the head 4 of the pedicle screw body 1, thereby completing the implantation of the pedicle screw body 1;

pedicle screw body 1 and locking cross screw 3 cross locking have increased pedicle screw body 1 resistance to plucking effect, and cross locking effectively prevents that pedicle screw body 1 from appearing not hard up the condition in cancellous bone and taking place simultaneously, increases one piece of locking cross screw 3, and operation easy operation fixes more firmly reliably, for the way of escape lumbar interbody fusion provides a better condition that fuses. The pain in the perioperative period is light, and the functional exercise can be performed in the early stage; the pedicle screw body 1 and the locking cross screw 3 are fixed in a cross mode, so that the holding force of the pedicle screw body 1 is enhanced, and the pedicle screw is more advantageous to patients with osteoporosis.

Although the present invention 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 in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pedicle screw is characterized by comprising a pedicle screw body, a sighting bracket, a guide tube and a locking cross screw, wherein the pedicle screw body comprises a head and a screw rod, the head comprises two opposite vertical plates, and the screw rod is provided with an oblique angle hole matched with the locking cross screw;

2. A pedicle screw as claimed in claim 1, wherein the guide tube is provided with a handle at one end thereof located at the top of the guide rod.

3. A pedicle screw as claimed in claim 2, wherein the handle is provided with a collar, and the handle is fixedly sleeved on the guide tube through the collar.

4. A pedicle screw as claimed in claim 1, wherein the two vertical plates are arc-shaped plates.

5. A pedicle screw as claimed in claim 1, wherein one end of the guide rod is embedded in the support rod.

6. The pedicle screw according to claim 1, wherein the support rod and the head are tightly connected with the vertical plate through the clamping groove.