CN105708534A - Screw cap of posterior minimally invasive screw-rod system for thoracolumbar vertebral fracture - Google Patents
Screw cap of posterior minimally invasive screw-rod system for thoracolumbar vertebral fracture Download PDFInfo
- Publication number
- CN105708534A CN105708534A CN201610014830.9A CN201610014830A CN105708534A CN 105708534 A CN105708534 A CN 105708534A CN 201610014830 A CN201610014830 A CN 201610014830A CN 105708534 A CN105708534 A CN 105708534A
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- CN
- China
- Prior art keywords
- screw cap
- nail
- head
- screw
- clamp block
- 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.)
- Pending
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
Abstract
The invention discloses a screw cap of a posterior minimally invasive screw-rod system for thoracolumbar vertebral fracture. The screw cap is characterized in that the outer side of the screw cap is provided with top-horizontal trapezoid-shaped convex threads (1), a plum-blossom-shaped groove (2) is formed in the middle of the screw cap, and is provided with reverse concave threads (3), the near end of the screw cap is provided with a U-shaped clamp block (4), and the screw cap is connected with the U-shaped clamp block through a movable embedding manner. The sizes of the above system parts are as follows: the diameter of the screw cap is 6-8 mm, and the thickness of the screw cap is 2-6 mm; the length of the U-shaped clamp block is 4-14 mm, the width of the U-shaped clamp block is 2-6 mm, and the height of the U-shaped clamp block is 6-12 mm. The near end of the screw cap is provided with the U-shaped clamp block, or is flat without the clamp block; the triangular, quadrangular, pentagonal, hexagonal or plum-blossom-shaped groove is formed in the middle of the screw cap. According to the screw cap provided by the invention, the design of the top-horizontal trapezoid-shaped convex threads on the outer side of the screw cap is beneficial for increasing the fixation strength of the screw cap and a screw tail; the plum-blossom-shaped groove is provided with the reverse concave threads, so that the slippage of the screw cap can be prevented when an internal fixation system is removed after fracture healing; due to the design of the U-shaped clamp block on the near end of the screw cap, the compressive stress between the screw cap and a main rod can be decomposed to the greatest extent, and thus the stability of the screw-rod system can be enhanced.
Description
Technical field
The present invention is applied to clinical orthopaedics, is the internal fixation system of a kind of lumbar vertebra compression fracture, belongs to medical device.It applies to human body
Thoracic vertebra, lumbar vertebra posterior longitudinal ligament completely unstable fracture closed reduction internal fixation apparatus.The application of this equipment, is i.e. conducive to alleviating
Operation wound, advantageously reduces again operation and hospital stays.
Background technology
The Therapeutic Method of lumbar vertebra compression fracture, in development, varies.Roy-Camille etc. started to apply pedicle screw in 1961
Fix in carrying out lumbar vertebra compression fracture with steel plate.Through semicentennial clinical practice and multicenter study analysis, it is believed that pedicle of vertebral arch screw
Nail treatment lumbar vertebra compression fracture is effective.Fracture or dislocation system also to pedicle screw-rod system evolution by nail-plate.Operation wound also with
Internal fixation system improvement and surgical proficiency level improves and reduces.At present, pedicle screw-rod system has become Thoracolumbar disk instability bone
The main flow of folding Posterior fixation treatment.Pedicle screw-rod system can provide stable interior fixing for lumbar vertebra compression fracture, controls the rotation of fracture well
Power, effectively strut the vertebral body of compression, recover Stability Analysis of Structures between vertebral body.Along with the proposition of BO theory, unstable lumbar vertebra compression fracture
Interior fixing is reset to closure reset transformation by opening, in order to alleviate soft tissue injury.But, it is thus achieved that and maintain Thoracolumbar disk to close
It is extremely difficult for closing reset.The internal fixation apparatus being correlated with now occurs, but still haves much room for improvement.We devise
A kind of lumbar vertebra compression fracture way of escape Wicresoft nail-stick system, is i.e. conducive to alleviating operation wound, advantageously reduces again operating time.
Summary of the invention
The invention aims to overcome the deficiency of existing lumbar vertebra compression fracture fracture or dislocation equipment, it is provided that a kind of effective interior
Fixation device.This novel system is i.e. conducive to alleviating operation wound, advantageously reduces again operating time.It it is Thoracolumbar disk instability bone
Folding, the optimum selection of the complete patient of posterior longitudinal ligament.
To achieve these goals, the present invention adopts the following technical scheme that:
The head of a nail of a kind of lumbar vertebra compression fracture way of escape Wicresoft nail-stick system, is characterized in that being set to upper flat trapezoidal convex thread (1) outside the head of a nail,
Being set to Flos Mume groove (2) in the middle of the head of a nail, Flos Mume groove is provided with reverse recessed screw thread (3), and head of a nail near-end is provided with U-shaped fixture block (4),
Head of a nail activity mutually embedding with U-shaped fixture block.Said system part size is: head of a nail diameter 6-8mm, thickness 2-6mm.U-shaped card block length
4-14mm, wide 2-6mm, high 6-12mm.Head of a nail near-end is provided with U-shaped fixture block or plane without fixture block.Be set in the middle of the head of a nail triangle, four
Angle, five jiaos, hexagonal and Flos Mume groove.
The operation principle of the present invention is: after anaesthetizing successfully, and patient takes prone position on Orthopedic operation bed, routine disinfection drape.
" C-arm " Fluoroscopy location hinders vertebra, inserts guide pin through neighbouring vertebral body pedicle of vertebral arch superior articular process and transverse process intersection, cut into
Mouth skin 2cm, inserts ductal ectasia, and places hollow screw tap along guide pin, carries out tapping, and application hollow pedicle crow-bar is fixed
Reset sleeve implants long-tail pedicle nail with long-tail pedicle nail through guide pin, and outside percutaneous, reset system distraction reduction fracture, rotated
Arm inserts T-bar guide pin in pedicle nail tail, inserts T-bar through this guide pin.T-bar main rod pre-bending as required.Location
Sheet controls the main rod degree of depth.It is screwed into the head of a nail respectively and locks.Go to allowance for bark outer reset system.Fracture pedicle nail long-tail and T-shaped handle.
Check dressing system, close otch and wrap up.Omnidistance operation under " C-arm " monitors.
Beneficial effect:
One, safety: percutaneous is inserted pedicle nail and be need not otch and appear paraspinal muscle.Omnidistance operation under " C-arm " monitors,
Guide pin is inserted with transverse process intersection through hindering vertebra neighbouring vertebral body pedicle of vertebral arch superior articular process, will not injured nerve, blood vessel.
Two, effectiveness: having at present multiple lumbar vertebra compression fracture way of escape Wicresoft system on the market, clinical practice is extensive.Native system is existing
Improve on the basis of having internal fixation system, it is adaptable to Thoracolumbar disk unstable fracture, and the patient that posterior longitudinal ligament is complete.This novel system
I.e. be conducive to alleviating operation wound, advantageously reduce again operating time.
It is an advantage of the current invention that: the present invention provide outside the head of a nail flat trapezoidal convex thread be designed with beneficially increase fixing with nail tail strong
Degree.When taking internal fixation system after the reverse recessed screw thread design beneficially union of fracture of Flos Mume groove, the prevention head of a nail slips.Head of a nail near-end U
Type fixture block is designed with and the most at utmost decomposes compressive stress between the head of a nail and main rod, the stability of strengthening nail bar system.
Accompanying drawing explanation
Fig. 1 is the front view of the head of a nail of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Icon: (1) upper flat trapezoidal convex thread, (2) Flos Mume groove, (3) reverse recessed screw thread, (4) U-shaped fixture block.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3 shows, the head of a nail of a kind of lumbar vertebra compression fracture way of escape Wicresoft nail-stick system, it is characterized in that outside the head of a nail
Being set to upper flat trapezoidal convex thread (1), be set to Flos Mume groove (2) in the middle of the head of a nail, Flos Mume groove is provided with reverse recessed screw thread (3), nail
Cap near-end is provided with U-shaped fixture block (4), head of a nail activity mutually embedding with U-shaped fixture block.Said system part size is: head of a nail diameter 6-8mm,
Thickness 2-6mm.U-shaped card block length 4-14mm, wide 2-6mm, high 6-12mm.Head of a nail near-end is provided with U-shaped fixture block or plane without fixture block.
Triangle, corner, five jiaos, hexagonal and Flos Mume groove it is set in the middle of the head of a nail.
Claims (3)
1. a head of a nail for lumbar vertebra compression fracture way of escape Wicresoft nail-stick system, is characterized in that being set to upper flat trapezoidal convex thread outside the head of a nail
(1), being set to Flos Mume groove (2) in the middle of the head of a nail, Flos Mume groove is provided with reverse recessed screw thread (3), and head of a nail near-end is provided with U-shaped fixture block
(4), head of a nail activity mutually embedding with U-shaped fixture block.
The head of a nail of lumbar vertebra compression fracture the most according to claim 1 way of escape Wicresoft nail-stick system, is characterized in that: head of a nail diameter
6-8mm, thickness 2-6mm, U-shaped card block length 4-14mm, wide 2-6mm, high 6-12mm.
The head of a nail of lumbar vertebra compression fracture the most according to claim 1 way of escape Wicresoft nail-stick system, is characterized in that: head of a nail near-end sets
Having U-shaped fixture block and plane without fixture block two kinds, the Flos Mume groove of the head of a nail is designed to triangle, corner, five jiaos, hexagonal or new hexagonal prunus mume (sieb.) sieb.et zucc.
Flower groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610014830.9A CN105708534A (en) | 2016-01-03 | 2016-01-03 | Screw cap of posterior minimally invasive screw-rod system for thoracolumbar vertebral fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610014830.9A CN105708534A (en) | 2016-01-03 | 2016-01-03 | Screw cap of posterior minimally invasive screw-rod system for thoracolumbar vertebral fracture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105708534A true CN105708534A (en) | 2016-06-29 |
Family
ID=56147691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610014830.9A Pending CN105708534A (en) | 2016-01-03 | 2016-01-03 | Screw cap of posterior minimally invasive screw-rod system for thoracolumbar vertebral fracture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105708534A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2873119Y (en) * | 2006-02-20 | 2007-02-28 | 郭谦 | Spine U-shape vertebral pedicle nail |
| DE102011111403A1 (en) * | 2011-04-13 | 2012-10-18 | Humantech Germany Gmbh | Tulip head screw for repositioning vertebral body with e.g. various indications, has tulip head thread whose diameter in region of outer circumferential predetermined breaking edge is greater than diameter of remaining of thread |
| US20120330364A1 (en) * | 2007-02-27 | 2012-12-27 | The Center For Orthopedic Research And Education, Inc. | Modular pedicle screw system |
| CN102973314A (en) * | 2011-09-07 | 2013-03-20 | 常州市康辉医疗器械有限公司 | Thoracolumbar spine posterior minimally invasive bone cement spine internal fixation system and application |
| CN202821566U (en) * | 2012-07-06 | 2013-03-27 | 常州市康辉医疗器械有限公司 | Novel universal vertebral pedicle screw |
| CN203303139U (en) * | 2013-06-21 | 2013-11-27 | 赵宏卫 | Minimally-invasive long-tail spine internal fixation system |
| CN203647452U (en) * | 2013-12-09 | 2014-06-18 | 嘉兴德康医疗器械有限公司 | Vertebral pedicle compressing and locking device of spine screw-rod system |
-
2016
- 2016-01-03 CN CN201610014830.9A patent/CN105708534A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2873119Y (en) * | 2006-02-20 | 2007-02-28 | 郭谦 | Spine U-shape vertebral pedicle nail |
| US20120330364A1 (en) * | 2007-02-27 | 2012-12-27 | The Center For Orthopedic Research And Education, Inc. | Modular pedicle screw system |
| DE102011111403A1 (en) * | 2011-04-13 | 2012-10-18 | Humantech Germany Gmbh | Tulip head screw for repositioning vertebral body with e.g. various indications, has tulip head thread whose diameter in region of outer circumferential predetermined breaking edge is greater than diameter of remaining of thread |
| CN102973314A (en) * | 2011-09-07 | 2013-03-20 | 常州市康辉医疗器械有限公司 | Thoracolumbar spine posterior minimally invasive bone cement spine internal fixation system and application |
| CN202821566U (en) * | 2012-07-06 | 2013-03-27 | 常州市康辉医疗器械有限公司 | Novel universal vertebral pedicle screw |
| CN203303139U (en) * | 2013-06-21 | 2013-11-27 | 赵宏卫 | Minimally-invasive long-tail spine internal fixation system |
| CN203647452U (en) * | 2013-12-09 | 2014-06-18 | 嘉兴德康医疗器械有限公司 | Vertebral pedicle compressing and locking device of spine screw-rod system |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |
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