CN103784187A - Minimally invasive wedge-shaped locking vertebral pedicle screw - Google Patents
Minimally invasive wedge-shaped locking vertebral pedicle screw Download PDFInfo
- Publication number
- CN103784187A CN103784187A CN201410064129.9A CN201410064129A CN103784187A CN 103784187 A CN103784187 A CN 103784187A CN 201410064129 A CN201410064129 A CN 201410064129A CN 103784187 A CN103784187 A CN 103784187A
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- China
- Prior art keywords
- wedge
- locking
- screw
- briquetting
- nail
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- 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 minimally invasive wedge-shaped locking vertebral pedicle screw. The minimally invasive wedge-shaped locking vertebral pedicle screw comprises a screw body 1, a jackscrew 2, locking wedges 3 and a pressing block 4. A screw part is arranged on the screw body 1, a screw base is arranged at the upper end of the screw part, a screw rod hole and a screw holding hole are formed in the side face of the screw base, a jackscrew hole is formed in the top end of the screw base, two open slots are formed in the wall of the jackscrew hole, locking wedge slopes are arranged on the lower portions of the locking wedges, wedge handles are arranged on the upper portions of the locking wedges, barbs are arranged on the wedge handles and used for demounting the locking wedges, an arc groove which is opened downwards is formed in the pressing block, two pressing block slopes are arranged on the upper sections of the two outer sides of the arc groove, and two guide bosses are arranged on the lower sections of the two outer sides of the arc groove. In the process of use, the screw part is screwed into a vertebral body, a bent spine rod 5 is inserted into a spine rod hole, the pressing block and the two locking wedges are sequentially pushed to the spine rod along the open slots, and the jackscrew is screwed into to press the locking wedges and the pressing block to lock the spine rod. By means of a wedge-shaped slope pressurization anti-loose locking mode, the minimally invasive wedge-shaped locking vertebral pedicle screw has the high self-locking anti-loose function.
Description
Technical field
The present invention relates to orthopedic medical device field.
Background technology
Minimally Invasive Surgery is widely used in recent years, and the application of Wicresoft's pedicle nail in spinal operation is also more and more.The patent No.: CN200820178613.4 discloses a kind of Wicresoft pedicle nail, is applicable to treat the diseases such as thoracic and lumbar vertebral posterior short segment wound, tumor and unstable spine.Current Wicresoft's pedicle nail, mainly formed by nail seat and the locking jackscrew of the screw, attachment screw and the spinal rod that screw in spinal vertebral, the locking mode of its spinal rod, that the line way of contact forming by the jackscrew end face compression spinal rod face of cylinder is locked, analyze from locking mode, the face way of contact is than the locking stability of the line way of contact is larger, anti-loosening property is higher.
Summary of the invention
The invention discloses a kind of Wicresoft wedge lock pedicle nail, adopt the locking mode of the face contact type cuniform increase power pressurization that locking anti-loosening property is higher, comprise rivet nut, jackscrew, locking wedge, briquetting, described rivet nut is provided with screw division, be used for screwing in spinal vertebral, the upper end of described screw division is provided with nail seat, the side of described nail seat is provided with the Yu Chiding hole, spinal rod hole of perforation, the top of described nail seat is provided with top wire hole, described top wire hole communicates with spinal rod hole, the inwall of described top wire hole is provided with two open slots, be used for coordinating special spanner rotation rivet nut and place described briquetting and two locking wedges, described briquetting is provided with the arc groove under shed, the arc surface of described arc groove requires to coordinate with the face of cylinder of spinal rod, the epimere in described arc groove two outsides is provided with two briquetting inclined-planes, hypomere is provided with two guide ledges, the bottom of described locking wedge is provided with locking wedge inclined-plane, described locking wedge inclined-plane is used for coordinating described briquetting inclined-plane locking spinal rod, the top of described locking wedge is provided with wedge handle, the end face of described wedge handle is made as plane, described wedge handle is provided with the syndeton such as barb or screw thread for retracting locking wedge, when use, first screw division is screwed in to spinal vertebral, again curved good spinal rod is inserted to spinal rod hole, then successively briquetting and two locking wedges are put into two open slots and make the inclined-plane of locking wedge and the arc groove of briquetting is pushed into nail rod by the laminating of the inclined-plane of briquetting, screw in again jackscrew also by compressing locking wedge and briquetting by locking firm spinal rod.This Wicresoft's wedge lock pedicle nail has adopted wedge shape inclined-plane pressurization anti-loosening locking, has larger coupling mechanism force and locking power, has therefore strengthened the steadiness of spinal operation, thereby can effectively improve the success rate of operation.
Accompanying drawing explanation:
Fig. 1 is the schematic diagram of a kind of Wicresoft of the present invention wedge lock pedicle nail;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the schematic diagram of rivet nut in a kind of Wicresoft of the present invention wedge lock pedicle nail;
Fig. 4 is the top view of Fig. 3;
Fig. 5 is the schematic diagram of locking wedge in a kind of Wicresoft of the present invention wedge lock pedicle nail;
Fig. 6 is the schematic diagram of briquetting in a kind of Wicresoft of the present invention wedge lock pedicle nail;
In accompanying drawing: 1. rivet nut; 2. jackscrew; 3. locking wedge; 4.Briquetting; 5. spinal rod; 6. screw division; 7. nail seat, 8. spinal rod hole; 9. top wire hole; 10. open slot; 11. locking wedge inclined-planes; 12. wedge handles; 13. barbs; 14. arc grooves; 15 briquetting inclined-planes; 16. guide ledges.
Embodiment:
Fig. 1 to Fig. 6 shows the embodiment of a kind of Wicresoft of the present invention wedge lock pedicle nail.
Fig. 1 to Fig. 2 shows the assembly relation of the each parts of a kind of Wicresoft of the present invention wedge lock pedicle nail and spinal rod, and it comprises rivet nut 1, jackscrew 2, locking wedge 3, briquetting 4, spinal rod 5.
Fig. 3 to Fig. 4 shows the structure of rivet nut 1, described rivet nut 1 is provided with screw division 6, be used for screwing in spinal vertebral, the upper end of described screw division 6 is provided with nail seat 7, the side of described nail seat 7 is provided with the spinal rod hole 8 of perforation and holds nail hole, and the top of described nail seat 7 is provided with a nail silk hole 9, and described top wire hole 9 communicates with spinal rod hole 8, the inwall in described nail silk hole 9 is provided with two open slots 10, for coordinating special spanner rotation rivet nut 1 and placing described briquetting 4 and two locking wedges 3.
Fig. 5 shows the structure of locking wedge 3, the bottom of described locking wedge 3 is provided with locking wedge inclined-plane 11, described locking wedge inclined-plane 11 is for coordinating briquetting inclined-plane 15 to lock spinal rod 5, the top of described locking wedge 3 is provided with wedge handle 12, the end face of described wedge handle 12 is made as plane, and described wedge handle 12 is provided with the syndetons such as barb 13 or screw thread for retracting locking wedge 3.
Fig. 6 shows the structure of briquetting 4, described briquetting 4 is provided with the arc groove 14 under shed, the arc surface of described arc groove 14 requires to coordinate with the face of cylinder of spinal rod 5, and the epimere in 14 liang of outsides of described arc groove is provided with two briquetting inclined-planes 15, hypomere is provided with two guide ledges 16.
When use, first screw division 6 is screwed in to spinal vertebral, again curved good spinal rod 5 is inserted to spinal rod hole 8, then successively briquetting 4 and two locking wedges 3 are put into two open slots 10, and the arc groove of briquetting 4 14 is pushed into spinal rod 5, fitted in locking wedge inclined-plane 11 and briquetting inclined-plane 15, screw in again jackscrew 2 also by compressing locking wedge 3 and briquetting 4 by locking firm spinal rod 5, this Wicresoft's wedge lock pedicle nail has adopted wedge shape inclined-plane pressurization anti-loosening locking, there is larger coupling mechanism force and locking power, therefore strengthened the steadiness of spinal operation, thereby can effectively improve the success rate of operation.
Claims (4)
1. Wicresoft's wedge lock pedicle nail, comprise rivet nut (1), jackscrew (2), briquetting (4), described rivet nut (1) is provided with screw division (6), the upper end of described screw division (6) is provided with nail seat (7), the side of described nail seat (7) is provided with the spinal rod hole (8) of perforation, the top of described nail seat (7) is provided with nail silk hole (9), described briquetting (4) is provided with the arc groove (14) under shed, the epimere that it is characterized in that described arc groove (14) two outsides is provided with two briquetting inclined-planes (15), the hypomere in described arc groove (14) two outsides is provided with two guide ledges (16), described a kind of Wicresoft wedge lock pedicle nail also comprises locking wedge (3), the bottom of described locking wedge (3) is provided with locking wedge inclined-plane (11), described locking wedge inclined-plane (11) is for coordinating briquetting inclined-plane (15) locking spinal rod (5), the top of described locking wedge (3) is provided with wedge handle (12), the inwall in described nail silk hole (9) is provided with two open slots (10) for coordinating special spanner rotation rivet nut and placing described briquetting (4) and two locking wedges (3).
2. a kind of Wicresoft wedge lock pedicle nail according to claim 1, the end face that it is characterized in that described wedge handle (12) is plane.
3. a kind of Wicresoft wedge lock pedicle nail according to claim 1, is characterized in that described wedge handle (12) is provided with the syndetons such as barb (13) or screw thread and is used for retracting locking wedge (3).
4. a kind of Wicresoft wedge lock pedicle nail according to claim 1, is characterized in that the locking of spinal rod (5) to adopt the anti-loosening locking mode of wedge shape inclined-plane pressurization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410064129.9A CN103784187B (en) | 2014-02-19 | 2014-02-19 | A kind of Wicresoft wedge lock pedicle nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410064129.9A CN103784187B (en) | 2014-02-19 | 2014-02-19 | A kind of Wicresoft wedge lock pedicle nail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103784187A true CN103784187A (en) | 2014-05-14 |
| CN103784187B CN103784187B (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410064129.9A Active CN103784187B (en) | 2014-02-19 | 2014-02-19 | A kind of Wicresoft wedge lock pedicle nail |
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| CN (1) | CN103784187B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241127A (en) * | 1996-12-20 | 2000-01-12 | 托马斯·T·海德尔 | Pedicle screw system for osteosynthesis |
| US6113601A (en) * | 1998-06-12 | 2000-09-05 | Bones Consulting, Llc | Polyaxial pedicle screw having a loosely coupled locking cap |
| US20060036242A1 (en) * | 2004-08-10 | 2006-02-16 | Nilsson C M | Screw and rod fixation system |
| US20070043355A1 (en) * | 2003-05-28 | 2007-02-22 | Stephane Bette | Connecting device for spinal osteosynthesis |
| CN101198284A (en) * | 2005-04-25 | 2008-06-11 | 新特斯有限责任公司 | Bone anchor with locking cap and method of spinal fixation |
| CN102164551A (en) * | 2008-07-24 | 2011-08-24 | 英格纽姆股份公司 | Locking mechanism with two-piece washer |
| CN202637080U (en) * | 2012-07-06 | 2013-01-02 | 常州市康辉医疗器械有限公司 | Minimally invasive hollow pedicle screw |
| 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 |
| CN203710116U (en) * | 2014-02-19 | 2014-07-16 | 山东航维骨科医疗器械股份有限公司 | Wedge-shaped minimally-invasive locking pedicle screw |
-
2014
- 2014-02-19 CN CN201410064129.9A patent/CN103784187B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241127A (en) * | 1996-12-20 | 2000-01-12 | 托马斯·T·海德尔 | Pedicle screw system for osteosynthesis |
| US6113601A (en) * | 1998-06-12 | 2000-09-05 | Bones Consulting, Llc | Polyaxial pedicle screw having a loosely coupled locking cap |
| US20070043355A1 (en) * | 2003-05-28 | 2007-02-22 | Stephane Bette | Connecting device for spinal osteosynthesis |
| US20060036242A1 (en) * | 2004-08-10 | 2006-02-16 | Nilsson C M | Screw and rod fixation system |
| CN101198284A (en) * | 2005-04-25 | 2008-06-11 | 新特斯有限责任公司 | Bone anchor with locking cap and method of spinal fixation |
| CN102164551A (en) * | 2008-07-24 | 2011-08-24 | 英格纽姆股份公司 | Locking mechanism with two-piece washer |
| CN202637080U (en) * | 2012-07-06 | 2013-01-02 | 常州市康辉医疗器械有限公司 | Minimally invasive hollow pedicle screw |
| 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 |
| CN203710116U (en) * | 2014-02-19 | 2014-07-16 | 山东航维骨科医疗器械股份有限公司 | Wedge-shaped minimally-invasive locking pedicle screw |
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| Publication number | Publication date |
|---|---|
| CN103784187B (en) | 2015-11-25 |
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