CN213345900U - Low-incisura pedicle screw - Google Patents
Low-incisura pedicle screw Download PDFInfo
- Publication number
- CN213345900U CN213345900U CN202021801316.8U CN202021801316U CN213345900U CN 213345900 U CN213345900 U CN 213345900U CN 202021801316 U CN202021801316 U CN 202021801316U CN 213345900 U CN213345900 U CN 213345900U
- Authority
- CN
- China
- Prior art keywords
- inner core
- groove
- tensioning sleeve
- pedicle screw
- low
- 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 belongs to the internal fixation of backbone surgical medical instrument field, concretely relates to low incisura pedicle screw. A low incisura pedicle screw comprises an inner core and a tensioning sleeve; the upper end of the inner core is provided with two deformation angles, and a circular groove is formed between the two deformation angles; the lower end of the inner core is provided with a mortar groove, a ball screw is arranged in the mortar groove, the top of the ball screw is provided with a hexagonal hole corresponding to the hexagonal hole, and a mortar groove through hole is formed in the inner core; the sleeve wall of the tensioning sleeve is provided with two circular groove notches corresponding to the trend of the circular grooves, and the top edge of the tensioning sleeve is also provided with an annular groove.
Description
Technical Field
The utility model belongs to the internal fixation of backbone surgical medical instrument field, concretely relates to low incisura pedicle screw.
Background
Spinal deformity refers to the deviation of coronal, sagittal or axial positions of the spine from normal, manifesting as morphological abnormalities. In a population of patients with spinal deformities, a subset of patients will undergo corrective treatment using intravertebral fixation surgery. In a screw rod system used in a spinal internal fixation operation, the top of a pedicle screw is mostly designed into a screw-in jackscrew, and an orthopedic rod is fixed through the screw-in jackscrew. Although the screw-in type jackscrew has better fixing effect, the defects also obviously exist: the screw-in jackscrew needs to be provided with a thread track with a certain height for matching, the structure increases the overall height of the pedicle screw, the interference to surrounding tissues at the operation position is large after the pedicle screw is implanted, and the foreign body sensation of a patient is strong; and screw-in jackscrews need to be screwed each jackscrew in the use to fasten the inspection, need use a plurality of pedicle of vertebral arch nails in the backbone internal fixation operation, screw the inspection to every pedicle of vertebral arch nail, greatly increased the operation time, increased the risk that arouses patient's complication simultaneously.
In order to solve the problem, the utility model provides a low incisure, easy operation's pedicle screw, the utility model discloses hope to provide a low incisure pedicle screw.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low incisura pedicle screw 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 low incisura pedicle screw comprises an inner core and a tensioning sleeve; the upper end of the inner core is provided with two deformation angles, and a circular groove is formed between the two deformation angles; the lower end of the inner core is provided with a mortar groove, a ball screw is arranged in the mortar groove, the top of the ball screw is provided with a hexagonal hole corresponding to the hexagonal hole, and a mortar groove through hole is formed in the inner core; the sleeve wall of the tensioning sleeve is provided with two circular groove notches corresponding to the trend of the circular grooves, and the top edge of the tensioning sleeve is also provided with an annular groove.
Preferably, the inner core is provided with an expansion joint.
Preferably, the distance between the outer edges of the top parts of the two deformation angles is larger than the inner diameter of the top part of the tensioning sleeve.
Preferably, strip-shaped depressions are formed in the outer walls of the two deformation angles.
Preferably, the two deformation angles are both provided with fixing grooves, and correspondingly, the tensioning sleeve is provided with two fixing groove gaps.
Preferably, the inner core is provided with an inner core locking groove, and correspondingly, the tensioning sleeve is provided with a round hole.
Preferably, the inner core and the two deformation angles form an inner core-deformation angle assembly, and the height of the inner core-deformation angle assembly is less than or equal to that of the tensioning sleeve.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the expansion joint is arranged on the inner core, so that a ball screw can be conveniently installed in the mortar groove, and after the ball screw is installed in the mortar groove, the inner core is extruded to reduce the expansion joint and fix the ball screw;
(2) the distance between the outer edges of the tops of the two deformation angles is larger than the inner diameter of the top of the tensioning sleeve, so that the deformation angles deform due to extrusion of the tensioning sleeve in the lifting process of the tensioning sleeve, and finally the deformation angles tightly hold the orthopedic rod in the circular groove;
(3) the outer walls of the two deformation angles are provided with strip-shaped depressions, so that the two deformation angles are in a thin waist shape, and the deformation of the deformation angles is facilitated;
(4) the outer edges of the two deformation angles are provided with fixing grooves, so that the deformation angles are easy to deform in the process of lifting the tensioning sleeve to extrude the deformation angles; and is convenient to hold and take by matching with a tool;
(5) an inner core locking groove is formed in the inner core, and meanwhile, a round hole is formed in the tensioning sleeve; after the tensioning sleeve is lifted upwards, the round hole is aligned with the inner core locking groove, a drill bit with the diameter larger than that of the round hole is aligned with the round hole to knock the round hole, the edge of the round hole is inwards sunken and deformed and is embedded into the inner core locking groove, so that the inner core and the tensioning sleeve are integrally assembled, and the tensioning sleeve is limited to rotate or move up and down relative to the inner core;
(6) the height of the inner core-deformation angle combination body is less than or equal to that of the tensioning sleeve, so that the whole pedicle screw can still ensure the advantage of low incisura after the tensioning sleeve is lifted.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic illustration of the device of FIG. 1 with an orthopedic rod attached thereto;
FIG. 3 is a schematic view of a ball screw of the device of FIG. 1;
FIG. 4 is a schematic view of the core-horn assembly of the device of FIG. 1;
FIG. 5 is a schematic structural view of a core-angle-change-ball screw assembly of the device of FIG. 1;
FIG. 6 is a schematic view of the structure of a tensioning sleeve in the device of FIG. 1;
FIG. 7 is a top view of the device of FIG. 1;
FIG. 8 is a first cross-sectional view of the device of FIG. 1;
FIG. 9 is a second cross-sectional view of the device of FIG. 1;
description of reference numerals: 1. an inner core; 2. a tensioning sleeve; 3. a deformation angle; 4. a circular groove; 5. a mortar groove; 6. a ball head screw; 7. a hexagonal hole; 8. a mortar-shaped slot through hole; 9. a circular groove gap; 10. an annular groove; 11. an expansion joint; 12. strip-shaped depressions; 13. fixing grooves; 14. a notch of the fixing groove; 15. an inner core locking groove; 16. a circular hole; 17. an orthopedic rod.
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. 1-9, the present invention provides a technical solution of a low incisura pedicle screw:
a low-incisura pedicle screw comprises an inner core 1 and a tensioning sleeve 2, wherein the tensioning sleeve 2 is sleeved on the inner core 1. A mortar groove 5 is formed in the lower portion of the inner core 1, and the mortar groove 5 is used for mounting a ball head screw 6; in order to facilitate the installation of the ball head screw 6, an expansion joint 11 is arranged on the inner core 1, the inner core 1 can be expanded and contracted within a certain range due to the existence of the expansion joint 11, the ball head screw 6 is installed in the mortar groove 5, the inner core 1 is extruded, the expansion joint 11 is contracted, and the inner core 1 after pressure is removed can also keep the state when being extruded due to the good ductility of the inner core 1, so that the ball head screw 6 can be firmly fixed in the mortar groove 5. Be equipped with hexagonal hole 7 at ball head screw 6's top, it is corresponding, be equipped with mortar groove through-hole 8 on inner core 1, hexagonal hole 7 and mortar groove through-hole 8 are convenient for cooperate the drill bit, implant the operation to this pedicle screw. Two deformation angles 3 are further arranged on the top of the inner core 1, a round groove 4 is formed between the two deformation angles 3, and the round groove 4 is used for accommodating and fixing the orthopedic rod 17. Corresponding to the trend of the circular groove 4, two circular groove notches 9 are arranged on the sleeve wall of the tensioning sleeve 2, the circular groove notches 9 correspond to the positions of the circular grooves 4 on the inner core, and the circular groove notches 9 and the circular grooves 4 reserve spaces for installing the orthopedic rod 17. In order to facilitate the bending deformation of the deformation angle 3 towards the circular groove 4, the strip-shaped recess 12 is arranged on the outer edge surface of the deformation angle 3, so that the deformation angle 3 is in a 'thin waist' shape. In order to further make the deformation angle 3 easy to deform, the outer edge surfaces of the two deformation angles 3 are both provided with fixing grooves 13, and correspondingly, the tensioning sleeve 2 is provided with a fixing groove notch 14 to provide a connection interface for a matching tool. In order to further limit the position relation between the tensioning sleeve 2 and the inner core 1, an inner core locking groove 15 is formed in the inner core 1, and a circular hole 16 is formed in the tensioning sleeve 2. After the tensioning sleeve 3 is lifted upwards, the inner core locking groove 15 is just attached to the round hole 16.
In the use process, the fixing grooves 13 on the two sides of the inner core 1 are clamped through the matching tool, so that the whole pedicle screw is held and taken, the matching tool is used for connecting the hexagonal hole 7 at the top of the ball screw 6, the ball screw 6 is driven to rotate by rotating the matching tool, and the pedicle screw is screwed into the skeleton of the human body. A plurality of pedicle screws are screwed into the human skeleton by the same method. The orthopedic rod 17 is placed into the circular groove 4 of the pedicle screw which is connected into a line, the pedicle screw is connected to form a frame structure, the tensioning sleeve 2 is lifted by using a matched tool, the upper end face of the tensioning sleeve 2 is flush with the upper end face of the inner core 1, and therefore the deformation angle 3 of the inner core is limited to deform outwards, the orthopedic rod 17 is embraced by the inner core 1, the orthopedic rod 17 is locked, and the orthopedic rod 17 is prevented from being separated from the circular groove 4 of the inner core 1. In the process of lifting and pulling the tensioning sleeve 2, the shape correcting rod 7 is arranged in the circular groove 4 of the inner core 1, so that the deformation angle 3 cannot be bent inwards continuously, and the inner core 1 and the tensioning sleeve 2 form an extrusion relation according to the reaction force relationship, thereby realizing friction locking and preventing the tensioning sleeve 2 from slipping. And after the tensioning sleeve 2 is lifted up, the round hole 16 is just aligned with the inner core locking groove 15, a drill bit with the diameter larger than that of the round hole 16 is used for knocking the round hole 16, so that the edge of the round hole 16 is inwards sunken and deformed and is embedded into the inner core locking groove 15, so that the integral assembly between the inner core 1 and the tensioning sleeve 2 is realized, and the tensioning sleeve 2 is limited to rotate or move up and down relative to the inner core 1. Meanwhile, the height of the inner core-deformation angle combination body is less than or equal to that of the tensioning sleeve 2, so that the advantage of low notch of the whole pedicle screw can be still ensured after the tensioning sleeve 2 is lifted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A low incisura pedicle screw is characterized in that: comprises an inner core and a tensioning sleeve; the upper end of the inner core is provided with two deformation angles, and a circular groove is formed between the two deformation angles; the lower end of the inner core is provided with a mortar groove, a ball screw is arranged in the mortar groove, the top of the ball screw is provided with a hexagonal hole corresponding to the hexagonal hole, and a mortar groove through hole is formed in the inner core; the sleeve wall of the tensioning sleeve is provided with two circular groove notches corresponding to the trend of the circular grooves, and the top edge of the tensioning sleeve is also provided with an annular groove.
2. The low-incisura pedicle screw according to claim 1, wherein: the inner core is provided with an expansion joint.
3. The low-incisura pedicle screw according to claim 1, wherein: the distance between the outer edges of the top parts of the two deformation angles is larger than the inner diameter of the top part of the tensioning sleeve.
4. The low-incisura pedicle screw according to claim 1, wherein: and strip-shaped depressions are formed in the outer walls of the two deformation angles.
5. The low-incisura pedicle screw according to claim 1, wherein: and two deformation angles are provided with fixing grooves, correspondingly, and the tensioning sleeve is provided with two fixing groove gaps.
6. The low-incisura pedicle screw according to claim 1, wherein: an inner core locking groove is formed in the inner core, and correspondingly, a round hole is formed in the tensioning sleeve.
7. The low-incisura pedicle screw according to claim 1, wherein: the inner core and the two deformation angles form an inner core-deformation angle assembly, and the height of the inner core-deformation angle assembly is less than or equal to that of the tensioning sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021801316.8U CN213345900U (en) | 2020-08-24 | 2020-08-24 | Low-incisura pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021801316.8U CN213345900U (en) | 2020-08-24 | 2020-08-24 | Low-incisura pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213345900U true CN213345900U (en) | 2021-06-04 |
Family
ID=76147012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021801316.8U Active CN213345900U (en) | 2020-08-24 | 2020-08-24 | Low-incisura pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213345900U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673902A (en) * | 2022-04-29 | 2022-06-28 | 衡阳市牛角尖网络科技有限公司 | Tripod of stepless adjustment supporting legs angle |
-
2020
- 2020-08-24 CN CN202021801316.8U patent/CN213345900U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114673902A (en) * | 2022-04-29 | 2022-06-28 | 衡阳市牛角尖网络科技有限公司 | Tripod of stepless adjustment supporting legs angle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5643265A (en) | Dynamic compression polyaxial locking screw plate assembly | |
| US8512380B2 (en) | Posterior fixation system | |
| AU2014248622B2 (en) | Pedicle screw with reverse spiral cut and methods thereof | |
| KR100704150B1 (en) | Spinal Pedicle Screw | |
| WO2013085835A1 (en) | Reduced component bone plating system | |
| CN213345900U (en) | Low-incisura pedicle screw | |
| CN110801273B (en) | Bone repair fixing assembly capable of pre-tightening and stopping | |
| CN213345898U (en) | Low incisura vertebral lamina hook | |
| US9763718B2 (en) | Bone screw | |
| CN209734116U (en) | self-locking spinal nail-rod fixing system | |
| US10357286B2 (en) | Osteosynthesis system comprising means for straightening a bone anchoring element relative to a screw head and anchoring screw implemented in such a system | |
| CN214761410U (en) | Atlas lateral mass and posterior nodule combined fixing device | |
| CN212490102U (en) | Posterior atlantoaxial reposition fixing system | |
| CN212490112U (en) | Special screw for rib plate | |
| CN210811451U (en) | Degradable magnesium alloy bone fixing screw | |
| CN210749469U (en) | Adjustable sealing cap of elastic intramedullary nail | |
| CN213345899U (en) | Lower-mounted cervical vertebra screw | |
| CN208659526U (en) | Synthetism clamping device and synthetism locking system | |
| CN212346688U (en) | Novel cervical vertebra side piece screw fixed knot constructs | |
| CN213283294U (en) | Supporting device | |
| CN217244737U (en) | Double-groove bone anchor assembly for spinal fusion surgery | |
| CN218009913U (en) | Rotatable cervical vertebra screw fixing device | |
| CN214712756U (en) | Auxiliary device for implanting and taking out internal fixing screw | |
| CN211610028U (en) | Internal fixing screw for femoral neck fracture | |
| CN219557517U (en) | Combined door opening plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A low notch pedicle screw Effective date of registration: 20220316 Granted publication date: 20210604 Pledgee: Bank of Shaoxing Co.,Ltd. high tech Development Zone sub branch Pledgor: ZHEJIANG JIAYOU MEDICAL INSTRUMENT Co.,Ltd. Registration number: Y2022330000344 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230425 Granted publication date: 20210604 Pledgee: Bank of Shaoxing Co.,Ltd. high tech Development Zone sub branch Pledgor: ZHEJIANG JIAYOU MEDICAL INSTRUMENT Co.,Ltd. Registration number: Y2022330000344 |