CN210697782U - MISS universal pedicle screw - Google Patents
MISS universal pedicle screw Download PDFInfo
- Publication number
- CN210697782U CN210697782U CN201920165655.2U CN201920165655U CN210697782U CN 210697782 U CN210697782 U CN 210697782U CN 201920165655 U CN201920165655 U CN 201920165655U CN 210697782 U CN210697782 U CN 210697782U
- Authority
- CN
- China
- Prior art keywords
- groove
- miss
- wall
- nail
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model discloses a MISS universal pedicle screw, which comprises a locking jackscrew, a screw cap and a screw body, wherein one end of the screw body is connected with a ball head, one end of the screw cap is provided with a spherical groove, the screw body passes through the inner cavity of the screw cap and is installed in the spherical groove through the rotation of the ball head, two U-shaped grooves which are symmetrically arranged are arranged on the side wall of the screw cap, two limiting through grooves which are symmetrically arranged are arranged on the side wall of the screw cap, two symmetrical guide grooves are arranged on the inner wall of the screw cap along the axial direction of the screw cap, one end of each guide groove extends to the corresponding limiting through groove, two same pressing blocks and a connecting rod which is used in a matching way are also arranged inside the screw cap, one end of each pressing block is provided with an arc-shaped groove, the radian of the arc-shaped groove is the same as that of the outer wall of the connecting rod, the other end of each pressing block is provided with a semi-spherical, provides convenience for the operation and is worth popularizing.
Description
Technical Field
The utility model relates to the field of medical equipment, specifically a MISS universal pedicle screw.
Background
At present, spinal internal fixation devices are mostly adopted to fix unstable vertebral bodies after spinal trauma, spondylolisthesis, degenerative diseases and other single-segment or multi-segment fractures. The fixator in the market is more in variety, but most of the fixator is composed of pedicle screws, universal pedicle screws, connecting rods and other corresponding parts. The universal pedicle screw is reset by lifting, so that the pedicle screw is firmly contacted with the inner fixing rod and the like. The existing universal pedicle screw consists of a screw, a screw cap and a pressing block, and in order to be convenient to install and not influence the movement of the universal screw cap in the operation process, the existing universal pedicle screw needs to bite bones frequently and is higher in incisura due to structural limitation. Therefore, the operation wound is large and the healing is slow, and the complication of the wound surface is easy to cause. Meanwhile, the structure for limiting the pressing block to be separated generally on the market is that two blind holes are formed in two sides corresponding to the nail cap and the pressing block, two protruding points are extruded out of the blind holes of the nail cap through an instrument after screws and the pressing block are loaded into the blind holes, the blind holes of the pressing block are pushed into the blind holes, the pressing block which is limited under the normal condition can move axially and is guaranteed not to fall off, and the pressing force and the protruding depth cannot be accurately controlled in actual operation, so that the phenomenon that the pressing block is blocked or separated from the pressing block occurs occasionally. Therefore, the clinical application of the universal pedicle screw has a plurality of defects.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an universal pedicle of vertebral arch screw of MISS to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a MISS universal pedicle screw comprises a locking jackscrew, a screw cap and a screw body, wherein one end of the screw body is connected with a ball head, one end of the screw cap is provided with a spherical groove, the screw body penetrates through an inner cavity of the screw cap and is rotatably installed in the spherical groove through the ball head, two U-shaped grooves which are symmetrically arranged are formed in the side wall of the screw cap, two limiting through grooves which are symmetrically arranged are formed in the side wall of the screw cap, two symmetrical guide grooves are formed in the inner wall of the screw cap along the axial direction of the screw cap, one end of each guide groove extends to the corresponding limiting through groove, two same pressing blocks and a connecting rod which is used in a matched mode are further arranged inside the screw cap, one end of each pressing block is provided with an arc-shaped groove, the radian of each arc-shaped groove is the same as that of the outer wall of the corresponding connecting rod, the other end of each pressing block is provided with a semi-spherical groove which is matched, the sliding groove is internally provided with a limiting rod in a sliding manner, an elastic part is arranged between one end of the limiting rod and the inner groove wall of the sliding groove, and the limiting rod is matched with the guide groove and the sliding groove
As a further aspect of the present invention: the top of the inner wall of the nail cap is provided with internal threads, and the locking jackscrew is in threaded connection with the nail cap.
As a further aspect of the present invention: the elastic piece is a spring piece.
As a further aspect of the present invention: the plane of the limiting through groove is perpendicular to the plane of the center line of the U-shaped groove.
As a further aspect of the present invention: the outer surface of the nail body is provided with external threads.
As a further aspect of the present invention: the density of the external thread is gradually reduced from the near end to the far end of the nail body.
As a further aspect of the present invention: and the top of the locking jackscrew is provided with a hexagonal hole.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses simple structure, high durability and convenient use, when MISS universal pedicle of vertebral arch screw assembles, elastic connection has spacing stick in the briquetting, spacing stick slides to spacing installation of realizing the briquetting under the cooperation of leading to groove and guide way is used along the guide way, prevent that it from taking place to drop, when needs are dismantled the briquetting, in pushing up the sliding tray with spacing stick through the thimble, thereby make spacing stick and spacing logical inslot separation, it can to take out the briquetting again, thereby realize the fast loading and unloading and spacing anticreep of briquetting, the operation treatment of being convenient for.
Drawings
Fig. 1 is a schematic structural view of a MISS universal pedicle screw.
Figure 2 is a side view of a MISS gimbaled pedicle screw.
Figure 3 is a cross-sectional view of a MISS gimbaled pedicle screw.
Fig. 4 is a top view of the nut in the MISS gimbaled pedicle screw.
Figure 5 is a top view of the compact in the MISS gimbaled pedicle screw.
Figure 6 is a cross-sectional view of the compact in the MISS gimbaled pedicle screw.
Fig. 7 is a bottom view of the MISS gimbaled pedicle screw central compact.
In the figure: locking jackscrew 1, nail cap 2, spacing logical groove 3, bulb 4, external screw thread 5, the nail body 6, connective bar 7, U type groove 8, hexagonal hole 9, guide way 10, briquetting 11, arc wall 12, hemisphere groove 13, sliding tray 14, spacing stick 15 and elastic component 16.
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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 7, in the embodiment of the present invention, a MISS universal pedicle screw includes a locking jackscrew 1, a screw cap 2 and a screw body 6, wherein one end of the screw body 6 is connected with a ball head 4, one end of the screw cap 2 is provided with a spherical groove, the screw body 6 passes through an inner cavity of the screw cap 2 and is rotatably installed in the spherical groove through the ball head 4, the top of the inner wall of the screw cap 2 is provided with an internal thread, and the locking jackscrew 1 is in threaded connection with the screw cap 2; the side wall of the nail cap 2 is provided with two symmetrically-arranged U-shaped grooves 8, the side wall of the nail cap 2 is provided with two symmetrically-arranged limiting through grooves 3, the inner wall of the nail cap 2 is provided with two symmetrical guide grooves 10 along the axial direction, one end of each guide groove 10 extends to the corresponding limiting through groove 3, two identical pressing blocks 11 and a connecting rod 7 which is matched with the pressing blocks are further arranged inside the nail cap 2, one end of each pressing block 11 is provided with an arc-shaped groove 12, the radian of each arc-shaped groove 12 is identical to that of the outer wall of each connecting rod 7, the other end of each pressing block 11 is provided with a hemispherical groove 13, each hemispherical groove 13 is matched with the spherical surface of the ball head 4, the outer wall of each pressing block 11 is matched with the inner wall of the nail cap 2, a sliding groove 14 which is perpendicular to the outer wall of each pressing block 11 is arranged inside the pressing block 11, each sliding groove 14 is internally provided with a limiting rod 15 in a sliding mode, an elastic; the elastic piece 16 is a spring piece; the plane of the limiting through groove 3 is vertical to the plane of the center line of the U-shaped groove 8; the outer surface of the nail body 6 is provided with an external thread 5; the density of the external thread 5 is gradually reduced from the near end to the far end of the nail body 6; the top of the locking jackscrew 1 is provided with a hexagonal hole 9; when in use, the MISS universal pedicle screw is firstly assembled, the screw body 6 penetrates through the inner cavity of the screw cap 2 and is movably arranged in the spherical groove of the screw cap 2 through the ball head 4, the pressing block 11 is placed in the inner cavity of the screw cap 2, the limiting rod 15 slides into the limiting through groove 3 along the guide groove 10, the elastic part 16 is in a compressed state when the limiting rod 15 is in the guide groove 10, when the limiting rod slides into the limiting through groove 3, the elastic part 16 freely extends, so that the limiting rod 15 is clamped into the limiting through groove 3, the limiting installation of the pressing block 11 is realized, the pressing block 11 is prevented from falling off, the hemispherical groove 13 is attached to the surface of the ball head 4, the connecting rod 7 is placed into the screw cap 2 along the U-shaped groove 8, the side surface of the connecting rod 7 is attached to the arc-shaped groove 12, after the angle of the screw body 6 is adjusted, the locking jackscrew 1 is screwed into the screw cap 2 through a hexagonal wrench, so that the connecting rod 7 and the pressing block 11 are sequentially, when needs are dismantled briquetting 11, push up spacing stick 15 through the thimble and go into sliding tray 14 to make spacing stick 15 and spacing logical groove 3 separate, take out briquetting 11 again can, thereby realize briquetting 11's fast loading and unloading and spacing anticreep, the operation treatment of being convenient for.
The utility model discloses a theory of operation is:
when in use, the MISS universal pedicle screw is firstly assembled, the screw body 6 penetrates through the inner cavity of the screw cap 2 and is movably arranged in the spherical groove of the screw cap 2 through the ball head 4, the pressing block 11 is placed in the inner cavity of the screw cap 2, the limiting rod 15 slides into the limiting through groove 3 along the guide groove 10, the elastic part 16 is in a compressed state when the limiting rod 15 is in the guide groove 10, when the limiting rod slides into the limiting through groove 3, the elastic part 16 freely extends, so that the limiting rod 15 is clamped into the limiting through groove 3, the limiting installation of the pressing block 11 is realized, the pressing block 11 is prevented from falling off, the hemispherical groove 13 is attached to the surface of the ball head 4, the connecting rod 7 is placed into the screw cap 2 along the U-shaped groove 8, the side surface of the connecting rod 7 is attached to the arc-shaped groove 12, after the angle of the screw body 6 is adjusted, the locking jackscrew 1 is screwed into the screw cap 2 through a hexagonal wrench, so that the connecting rod 7 and the pressing block 11 are sequentially pressed, when needs are dismantled briquetting 11, push up spacing stick 15 through the thimble and go into sliding tray 14 to make spacing stick 15 and spacing logical groove 3 separate, take out briquetting 11 again can, thereby realize briquetting 11's fast loading and unloading and spacing anticreep, the operation treatment of being convenient for.
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 or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a universal pedicle of vertebral arch screw of MISS, includes locking jackscrew (1), head of a nail (2) and the nail body (6), its characterized in that: one end of the nail body (6) is connected with a ball head (4), one end of the nail cap (2) is provided with a spherical groove, the nail body (6) penetrates through an inner cavity of the nail cap (2) and is rotatably installed in the spherical groove through the ball head (4), two U-shaped grooves (8) which are symmetrically arranged are formed in the side wall of the nail cap (2), two limiting through grooves (3) which are symmetrically arranged are formed in the side wall of the nail cap (2), two symmetrical guide grooves (10) are formed in the inner wall of the nail cap (2) along the axial direction of the nail cap, one end of each guide groove (10) extends to the corresponding limiting through groove (3), two same pressing blocks (11) and a connecting rod (7) which is matched with the pressing blocks for use are further arranged inside the nail cap (2), one end of each pressing block (11) is provided with an arc-shaped groove (12), the radian of each arc-shaped groove (12) is the same as that of the outer wall of, hemisphere groove (13) and the sphere phase-match of bulb (4), the outer wall of briquetting (11) and the inner wall phase-match of nail cap (2), inside of briquetting (11) is seted up rather than outer wall looks vertically sliding tray (14), slidable mounting has spacing stick (15) in sliding tray (14), be equipped with elastic component (16) between the one end of spacing stick (15) and the interior cell wall of sliding tray (14), spacing stick (15) and guide way (10) and sliding tray (14) phase-match.
2. The MISS universal pedicle screw of claim 1, wherein: the top of the inner wall of the nail cap (2) is provided with an internal thread, and the locking jackscrew (1) is in threaded connection with the nail cap (2).
3. The MISS universal pedicle screw of claim 1, wherein: the elastic piece (16) is a spring piece.
4. The MISS universal pedicle screw of claim 1, wherein: the plane of the limiting through groove (3) is vertical to the plane of the center line of the U-shaped groove (8).
5. The MISS universal pedicle screw of claim 1, wherein: the outer surface of the nail body (6) is provided with an external thread (5).
6. The MISS universal pedicle screw of claim 5, wherein: the density of the external thread (5) is gradually reduced from the near end to the far end of the nail body (6).
7. The MISS universal pedicle screw of claim 1, wherein: and the top of the locking jackscrew (1) is provided with a hexagonal hole (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920165655.2U CN210697782U (en) | 2019-01-30 | 2019-01-30 | MISS universal pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920165655.2U CN210697782U (en) | 2019-01-30 | 2019-01-30 | MISS universal pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210697782U true CN210697782U (en) | 2020-06-09 |
Family
ID=70924342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920165655.2U Active CN210697782U (en) | 2019-01-30 | 2019-01-30 | MISS universal pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210697782U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113349909A (en) * | 2021-05-07 | 2021-09-07 | 四川大学华西医院 | Disconnect-type screw |
-
2019
- 2019-01-30 CN CN201920165655.2U patent/CN210697782U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113349909A (en) * | 2021-05-07 | 2021-09-07 | 四川大学华西医院 | Disconnect-type screw |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8784455B2 (en) | Bone anchoring device | |
| AU2006270487A1 (en) | Bi-polar bone screw assembly | |
| WO2007114834A1 (en) | Multi-axial, double locking bone screw assembly | |
| CN210697782U (en) | MISS universal pedicle screw | |
| CN203647452U (en) | Vertebral pedicle compressing and locking device of spine screw-rod system | |
| CN201070386Y (en) | Universal vertebra arch root screw | |
| US20150289916A1 (en) | Bone screws having more than three leads | |
| CN205433863U (en) | Universal fixed, little dynamic dual -purpose pedicle screw | |
| CN105434021B (en) | A kind of pedicle screw | |
| US20180132902A1 (en) | Uniplanar pedicle screw | |
| CN210749449U (en) | Pressure measuring threaded fastening nail for orthopedic surgery | |
| CN107260282B (en) | double-U screw | |
| CN106037915B (en) | Rotating cutting ferrule type screw on nut | |
| CN207970139U (en) | A kind of interlocking formula pedicle screw sighting device | |
| CN216724712U (en) | Bidirectional locking nail cap system | |
| CN203291001U (en) | Thread type lag screw system and special composite screw driver thereof | |
| CN203802557U (en) | Spinal column vertebral body slip reset fixing support | |
| CN208838151U (en) | A kind of bone nail extractor | |
| CN220967417U (en) | Human body reference frame fixing instrument | |
| CN106510822B (en) | Combined pelvis drift minimally invasive internal fixing device | |
| CN211381693U (en) | Pedicle screw lifting restorer | |
| CN216090736U (en) | Universal hollow locking screw | |
| CN103349565B (en) | Thread type lag screw system and special compound opener thereof | |
| CN211484859U (en) | Plug fixed block | |
| CN203458463U (en) | Crushed bone fixator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |