CN104173099A - Locking screw of minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system - Google Patents
Locking screw of minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system Download PDFInfo
- Publication number
- CN104173099A CN104173099A CN201410436467.0A CN201410436467A CN104173099A CN 104173099 A CN104173099 A CN 104173099A CN 201410436467 A CN201410436467 A CN 201410436467A CN 104173099 A CN104173099 A CN 104173099A
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- CN
- China
- Prior art keywords
- screw
- locking
- internal fixation
- fixation system
- wicresoft
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- 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.)
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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
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
Abstract
The invention discloses a locking screw of a minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system. The locking screw comprises an axial fixing screw and an unidirectional locking screw, wherein the axial fixing screw and the unidirectional locking screw are connected with each other, a plurality of through holes are formed in the axial fixing screw, inner threads are arranged in the through holes, and one end of the unidirectional locking screw is movably connected with the inside of the through holes. The axial fixing screw comprises a screw front portion and a screw rear portion, and a through hole is formed in the screw front portion and the screw rear portion. The locking screw is simple in structure, reasonable in design, and capable of improving anti-rotation stability, a thread portion at the small end of the locking screw is rotatably locked in the through holes in the axial fixing screw for unidirectional locking so that the locking screw is not prone to exit, and the locking screw has the anti-rotation, anti-compression, anti-stretching, and anti-bending functions.
Description
Technical field
The invention belongs to medical instruments field, specifically, relate to a kind of Wicresoft waist sacral locking axis to merging internal fixation system lock screw.
Background technology
Lumbosacral fusion is the common modus operandi of one for the treatment of clinically the diseases such as waist sacral degenerated, shakiness.Current routine clinical anterior approach easy damaged internal organs, blood vessel and nerve, posterior approach disturbs large to spinal column physiological function, do not meet the biomethanics structure of spinal column.In the recent decade, along with Wicresoft's theory and scientific and technical development, taking the front road of peritoneoscope lockhole, mini-invasive incision, obtained rapid progress through fixing the fusion etc. as the Novel lumbar anterior minimally invasive operation of representative of Intradermal.
All adopt outer putting property to perform the operation to fixing in waist sacrum intervertebral fusion both at home and abroad at present, its wound is large, hemorrhage many, easy infection, and rehabilitation duration is long etc.The people such as the Cragg by the U.S. in 2004 propose, in axially merging between waist sacral, fixing invasive surgery is that interior technique for fixing is merged in a kind of new Wicresoft occurring in recent years, and be used widely in American-European countries, in China since 2006 in clinical middle application, it is little that it has wound, goes out insufficiency of blood, not easy infection, the many merits such as rehabilitation is fast and retained the complete structure of spinal column, and in its fusion, fixed rate is higher, the hospital stays is short.Therefore, the extremely favor of spinal surgeons, its clinical practice is also the trend increasing year by year.
Though but in clinical research, find to fix and there is better anteflexion and lateral stability in the axial fusion of waist sacral, and poor on rotational stabilization.Often need to be aided with in the nail-stick system of the waist sacral way of escape fixing for improving anti-rotational stability, so axial fusion internal fixation operation and screw-rod internal fixation operation, and surgery cost costliness, numerous compatriots are difficult to bear, and this operation technique is cumbersome, operating time is long, and wound increases thereupon, hemorrhagely also increases.
So invent a kind of for waist sacral locking axis to merge in fixing lock screw, just become a problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned defect, provides a kind of simple in structure, reasonable in design and Wicresoft's waist sacral locking axis that can improve anti-rotational stabilization to merging internal fixation system lock screw.
For addressing the above problem, the technical solution adopted in the present invention is:
A kind of Wicresoft waist sacral locking axis, to merging internal fixation system lock screw, comprises interconnective axial restraint screw and monodirectional locking screw, is provided with some through holes on axial restraint screw, is provided with female thread in through hole; One end of monodirectional locking screw is movably connected in through hole.
Described axial restraint screw comprises screw front portion and screw rear portion, on screw front portion and screw rear portion, is respectively arranged with a through hole.
The other end of monodirectional locking screw is provided with six cylinder ends.
The anterior diameter of described screw is less than screw rear portion diameter, and screw front portion and screw rear portion are respectively arranged with screw thread.
The afterbody at described screw rear portion has endoporus, is provided with screw thread in endoporus, and is provided with interlock breach.
In the rear-end endoporus of screw, be provided with interior hexagonal.
The shape of interlock breach can be determined by actual needs, and the cross sectional shape of interlock breach can be rectangle.
Described monodirectional locking screw comprises small end threaded portion and large end threaded portion, and the screw thread of holding greatly threaded portion is cancellous threads; Described small end threaded portion is connected with the through hole whorl on axial restraint screw.
The bottom of small end threaded portion is round bottom.
The small end threaded portion of monodirectional locking screw and to hold greatly the Length Ratio of threaded portion be the most appropriate selection between 1:1.2-1.8, and the diameter of small end threaded portion and large end threaded portion is than being 1:1.08-1.3.
The screw front portion of axial restraint screw and the Length Ratio at screw rear portion are the most appropriate selections between 1:0.5-2, and screw is anterior and the diameter ratio at screw rear portion is 1:1.05-2.
Owing to having adopted above-mentioned technical scheme, compared with prior art, the present invention is simple in structure, reasonable in design, can improve anti-rotational stabilization, in the through hole of small end threaded portion rotation interlocking on axial restraint screw, carry out monodirectional locking, make it to be difficult for exiting, there is anti-rotation, incompressible, stretch-proof, counter-bending function.
Below in conjunction with the drawings and specific embodiments, the invention will be further described simultaneously.
Brief description of the drawings
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is the structural representation of an embodiment of the present invention axial restraint screw;
Fig. 3 is the structural representation of an embodiment of the present invention monodirectional locking screw;
Fig. 4 is the right view of Fig. 2.
Detailed description of the invention
Embodiment:
As shown in Figure 1, a kind of Wicresoft waist sacral locking axis, to merging internal fixation system lock screw, comprises interconnective axial restraint screw and monodirectional locking screw 2, is provided with some through holes 13 on axial restraint screw, in through hole 13, is provided with female thread; One end of monodirectional locking screw 2 is movably connected in through hole 13.
Described axial restraint screw comprises screw anterior 11 and screw rear portion 12, on screw anterior 11 and screw rear portion 12, is respectively arranged with a through hole 13.
The other end of monodirectional locking screw 2 is provided with six cylinder ends 21.
As shown in Figure 2, anterior 11 diameters of described screw are less than screw rear portion diameter 12, and screw anterior 11 and screw rear portion 12 are respectively arranged with screw thread.
As shown in Figure 4, the afterbody at described screw rear portion 12 has endoporus 15, is provided with screw thread and interior hexagonal in endoporus 15, and is provided with interlock breach 14.The shape of interlock breach 14 can be determined by actual needs, and the cross sectional shape of interlock breach 14 can be rectangle.
As shown in Figure 3, described monodirectional locking screw 2 comprises small end threaded portion 22 and large end threaded portion 23, and the screw thread of holding greatly threaded portion 23 is cancellous threads, and the bottom of small end threaded portion 22 is round bottom; Described small end threaded portion 22 is threaded with the through hole 13 on axial restraint screw.
Consider the problem of actual use, the Length Ratio of the small end threaded portion 22 of monodirectional locking screw 2 and large end threaded portion 23 is the most appropriate selection between (1:1.2)-(1:1.8), and the diameter of small end threaded portion 22 and large end threaded portion 23 is than being (1:1.08)-(1:1.3).Meanwhile, the Length Ratio at screw anterior 11 and screw rear portion 12 is the most appropriate selection between (1:0.5)-(1:2), and the diameter at screw anterior 11 and screw rear portion 12 is than being (1:1.05)-(1:2).In aforementioned proportion, incompressible, stretch-proof of the present invention, bending resistance are best, and have best anti-rotational stabilization.
The present invention is simple in structure, reasonable in design, can improve anti-rotational stabilization, in the through hole of small end threaded portion rotation interlocking on axial restraint screw, carries out monodirectional locking, makes it to be difficult for exiting, and has anti-rotation, incompressible, stretch-proof, counter-bending function.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or akin technical scheme with the present invention, all belongs to protection scope of the present invention.
Claims (10)
1. Wicresoft's waist sacral locking axis, to merging an internal fixation system lock screw, is characterized in that: comprise interconnective axial restraint screw and monodirectional locking screw, be provided with some through holes on axial restraint screw, be provided with female thread in through hole; One end of monodirectional locking screw is movably connected in through hole.
According to the Wicresoft's waist sacral locking axis described in claim 1 to merging internal fixation system lock screw, it is characterized in that: described axial restraint screw comprises the anterior and screw rear portion of screw, on screw front portion and screw rear portion, is respectively arranged with a through hole.
According to the Wicresoft's waist sacral locking axis described in claim 2 to merging internal fixation system lock screw, it is characterized in that: the anterior diameter of described screw is less than screw rear portion diameter, the anterior and screw rear portion of screw is respectively arranged with screw thread.
According to the Wicresoft's waist sacral locking axis described in claim 3 to merging internal fixation system lock screw, it is characterized in that: the afterbody at described screw rear portion has endoporus, is provided with screw thread in endoporus, and be provided with interlock breach.
According to the Wicresoft's waist sacral locking axis described in claim 4 to merging internal fixation system lock screw, it is characterized in that: in the rear-end endoporus of screw, be provided with interior hexagonal.
According to the Wicresoft's waist sacral locking axis described in claim 4 to merging internal fixation system lock screw, it is characterized in that: the cross sectional shape of interlock breach can be rectangle.
According to the Wicresoft's waist sacral locking axis described in claim 1 to merging internal fixation system lock screw, it is characterized in that: described monodirectional locking screw comprises small end threaded portion and large end threaded portion, and the screw thread of holding greatly threaded portion is cancellous threads; Described small end threaded portion is connected with the through hole whorl on axial restraint screw.
According to the Wicresoft's waist sacral locking axis described in claim 7 to merging internal fixation system lock screw, it is characterized in that: the bottom of small end threaded portion is round bottom.
According to the Wicresoft's waist sacral locking axis described in claim 7 to merging internal fixation system lock screw, it is characterized in that: the axially small end threaded portion of monodirectional locking screw and to hold greatly the Length Ratio of threaded portion be the most appropriate selection between 1:1.2-1.8, and the diameter of small end threaded portion and large end threaded portion is than being 1:1.08-1.3.
According to the Wicresoft's waist sacral locking axis described in claim 7 to merging internal fixation system lock screw, it is characterized in that: the screw front portion of hold-down screw and the Length Ratio at screw rear portion are the most appropriate selections between 1:0.5-2, and screw is anterior and the diameter ratio at screw rear portion is 1:1.05-2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410436467.0A CN104173099A (en) | 2014-08-29 | 2014-08-29 | Locking screw of minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410436467.0A CN104173099A (en) | 2014-08-29 | 2014-08-29 | Locking screw of minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104173099A true CN104173099A (en) | 2014-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410436467.0A Pending CN104173099A (en) | 2014-08-29 | 2014-08-29 | Locking screw of minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system |
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| CN (1) | CN104173099A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111184564A (en) * | 2019-12-26 | 2020-05-22 | 南华大学附属南华医院 | Novel unilateral locking lumbosacral vertebrae axial fusion internal fixation system |
| CN112155703A (en) * | 2020-10-23 | 2021-01-01 | 江佩师 | Internal fixation device for axial fusion of lumbosacral vertebrae with built-in lock pins |
Citations (7)
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|---|---|---|---|---|
| EP1214914A2 (en) * | 2000-12-18 | 2002-06-19 | Herbert Bernsteiner | Locking screw for implants |
| FR2895664A1 (en) * | 2005-12-29 | 2007-07-06 | Fournitures Hospitalieres Ind | Transcalcaneal screw for maintaining nail during arthrodesis of ankle, has threaded portion cooperating with tapping of opening of nail, where screwing of portion continues until tapered portion is encased in inlet of funnel |
| US20090326533A1 (en) * | 2006-11-17 | 2009-12-31 | Synthes Usa, Llc | Intramedullary Nail Including Stable Locking Bolts |
| CN202365902U (en) * | 2011-12-14 | 2012-08-08 | 宋西正 | Lock-mounted axial infusion internal fixator for lumbosacral vertebrae |
| CN203493719U (en) * | 2013-10-11 | 2014-03-26 | 鲁晓波 | Intramedullary fixing main nail for tubular bone fracture and fixer comprising intramedullary fixing main nail |
| CN103800064A (en) * | 2014-01-22 | 2014-05-21 | 苏州大学 | Double-locking intramedullary nail structure |
| CN204121147U (en) * | 2014-08-29 | 2015-01-28 | 南华大学 | A kind of Wicresoft lumbosacral spine locking axis is to fusion internal fixation system lock screw |
-
2014
- 2014-08-29 CN CN201410436467.0A patent/CN104173099A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1214914A2 (en) * | 2000-12-18 | 2002-06-19 | Herbert Bernsteiner | Locking screw for implants |
| FR2895664A1 (en) * | 2005-12-29 | 2007-07-06 | Fournitures Hospitalieres Ind | Transcalcaneal screw for maintaining nail during arthrodesis of ankle, has threaded portion cooperating with tapping of opening of nail, where screwing of portion continues until tapered portion is encased in inlet of funnel |
| US20090326533A1 (en) * | 2006-11-17 | 2009-12-31 | Synthes Usa, Llc | Intramedullary Nail Including Stable Locking Bolts |
| CN202365902U (en) * | 2011-12-14 | 2012-08-08 | 宋西正 | Lock-mounted axial infusion internal fixator for lumbosacral vertebrae |
| CN203493719U (en) * | 2013-10-11 | 2014-03-26 | 鲁晓波 | Intramedullary fixing main nail for tubular bone fracture and fixer comprising intramedullary fixing main nail |
| CN103800064A (en) * | 2014-01-22 | 2014-05-21 | 苏州大学 | Double-locking intramedullary nail structure |
| CN204121147U (en) * | 2014-08-29 | 2015-01-28 | 南华大学 | A kind of Wicresoft lumbosacral spine locking axis is to fusion internal fixation system lock screw |
Non-Patent Citations (2)
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| 李阳等: "基于三维重建技术的腰骶椎轴向融合术入路的相关解剖学测量", 《中国临床解剖学杂志 》 * |
| 马向阳: "腰骶椎带锁轴向融合固定的影像学研究", 《中国优秀硕士学位论文全文数据库 医药卫生科技辑（月刊）》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111184564A (en) * | 2019-12-26 | 2020-05-22 | 南华大学附属南华医院 | Novel unilateral locking lumbosacral vertebrae axial fusion internal fixation system |
| CN112155703A (en) * | 2020-10-23 | 2021-01-01 | 江佩师 | Internal fixation device for axial fusion of lumbosacral vertebrae with built-in lock pins |
| CN112155703B (en) * | 2020-10-23 | 2022-09-02 | 江佩师 | Internal fixation device for axial fusion of lumbosacral vertebrae with built-in lock pins |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141203 |
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| RJ01 | Rejection of invention patent application after publication |