CN202365902U - Lock-mounted axial infusion internal fixator for lumbosacral vertebrae - Google Patents
Lock-mounted axial infusion internal fixator for lumbosacral vertebrae Download PDFInfo
- Publication number
- CN202365902U CN202365902U CN2011205207823U CN201120520782U CN202365902U CN 202365902 U CN202365902 U CN 202365902U CN 2011205207823 U CN2011205207823 U CN 2011205207823U CN 201120520782 U CN201120520782 U CN 201120520782U CN 202365902 U CN202365902 U CN 202365902U
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- China
- Prior art keywords
- screw rod
- end screw
- hole
- small end
- screw
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Abstract
A lock-mounted axial infusion internal fixator for lumbosacral vertebrae comprises an axial infusion fixator and two locking screws; the axial infusion fixator comprises a large end screw rod and a small end screw rod; a transverse through hole is formed at the joint of the large end screw rod and the small end screw rod; an axial through hole is formed at the axis of the large end screw rod and the small end screw rod; internal threads and an open slot are formed at the end part of the large end screw rod; a locking screw hole used for holding the locking screw is formed on the large end screw rod; two ends of the locking screw hole on the large end screw rod are designed into horn mouths; likewise, a locking screw hole used for holding the locking screw is formed on the small end screw rod; two ends of the locking screw hole on the small end screw rod are designed into horn mouths; and each locking screw is composed of a screw rod and a column-shaped locking nail, and one end of the screw rod is designed to be hexagonal.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, and particularly a kind of waist sacrum vertebral body countershaft is to the converged fixed device.
Background technology
How the lumbosacral disc disease carries out the treatment of little, the thorough decompression of wound, fixing-stable, is the research focus and the difficult point of field of spinal surgery always, also is the key point of vertebral column minimally invasive technical development.The axial presented in internal fixation of waist sacral system has Wicresoft's advantage, and the most outstanding characteristics are through the axial presented in internal fixation of rumpbone anterior approach, can reduce operation wound to greatest extent, reduces the generation of " spinal fusion is sick ".This art formula has broken through traditional approach mode (forward and backward approach); Creatively through the capable waist sacral of rumpbone anterior approach axon to presented in internal fixation; Utilize the mis instruments of dissecting gap and special use before the rumpbone through rumpbone anterior approach arrival sacral, drill rumpbone and L5/S1 intervertebral space, accomplish the decompression of L5/S1 intervertebral space and the implantation of integrating materials through service pipe; Then the axial restraint screw is inserted along passage, thereby accomplish that waist sacral axis struts, discectomy, intervertebral bone-graft fusion fix.But this system has destroyed spine structure when reducing pressure, and makes axial restraint screw torsional rotation force reduce, and often needs associating way of escape cervical arc root screw internal fixing system with the enhancing spinal stability, thereby causes this operation wound increase, time lengthening, medical expense height.
Summary of the invention
The purpose of this utility model is to overcome the above-mentioned deficiency of prior art and provide a kind of waist sacral locking axis to the presented in internal fixation device.
The technical scheme of this utility model is: a kind of waist sacral locking axis is made up of axial converged fixed device and two lock screw to the presented in internal fixation device.
Described axial converged fixed device is made up of big end screw rod and small end screw rod; The joint portion of big end screw rod and small end screw rod is provided with a cross through hole; The axis of big end screw rod and small end screw rod is provided with an axially extending bore, holds the end of screw rod to be provided with female thread and open slot greatly.On big end screw rod, be provided with a screw hole that is used for laying lock screw, holding greatly that the two ends of screw hole are designed to horn mouth on the screw rod.Be provided with a screw hole that is used for laying lock screw too at the small end screw rod, the two ends of screw hole are designed to horn mouth on the small end screw rod.
Described lock screw is made up of screw rod and cylindrical locking nail, and an end of screw rod is designed to hexagon.
During use, two lock screw percutaneous cervical arc root under the supervision of C arm type machine screws in respectively in the screw hole on big end screw rod of axial converged fixed device and the small end screw rod, prevents that axial converged fixed device rotation displacement is to strengthen spinal stability.After axially the converged fixed device fixes, the protrusion position of lock screw is bitten broken subcutaneous.
This utility model compared with prior art has following characteristics:
The waist sacral locking axis that this utility model provides has been set up lock screw to the presented in internal fixation device; Prevent that through lock screw axial converged fixed device rotation displacement is to strengthen spinal stability; Remove the operation of associating way of escape cervical arc root screw internal fixing system; Reduce tissue injury, shorten operating time, reduce medical expense, realized that really the waist sacrum merges Wicresoft's advantage of axial restraint.
Further describe below in conjunction with accompanying drawing and the specific embodiment detailed structure this utility model.
Description of drawings
Accompanying drawing 1 is the structural representation of this utility model;
Accompanying drawing 2 is the structural representation of axial converged fixed device;
Accompanying drawing 3 is the right view in the accompanying drawing 2;
Accompanying drawing 4 is the structural representation of lock screw.
The specific embodiment
A kind of waist sacral locking axis is made up of axial converged fixed device 1 and two lock screw 2 to the presented in internal fixation device.
Described axial converged fixed device 1 is made up of big end screw rod 1-1 and small end screw rod 1-2; The joint portion of big end screw rod 1-1 and small end screw rod 1-2 is provided with a cross through hole 1-5; Big end screw rod 1-1 and small end screw rod 1-2 axis are provided with an axially extending bore 1-6, hold the end of screw rod 1-1 to be provided with female thread 1-7 and open slot 1-4 greatly.On big end screw rod 1-1, be provided with a screw hole 1-3 who is used for laying lock screw 2, the two ends of holding screw rod 1-1 to go up screw hole 1-3 greatly are designed to horn mouth.On small end screw rod 1-2, be provided with a screw hole 1-4 who is used for laying lock screw 2 too, the two ends that small end screw rod 1-2 goes up screw hole 1-4 are designed to horn mouth.
Described lock screw 2 is made up of screw rod 2-1 and cylindrical locking nail 2-2, and the end of screw rod 2-1 is designed to hexagon.
Claims (1)
1. a waist sacral locking axis is characterized in that to the presented in internal fixation device: be made up of axial converged fixed device and two lock screw;
Described axial converged fixed device is made up of big end screw rod and small end screw rod; The joint portion of big end screw rod and small end screw rod is provided with a cross through hole; The axis of big end screw rod and small end screw rod is provided with an axially extending bore, holds the end of screw rod to be provided with female thread and open slot greatly; On big end screw rod, be provided with a screw hole that is used for laying lock screw, holding greatly that the two ends of screw hole are designed to horn mouth on the screw rod; On the small end screw rod, be provided with a screw hole that is used for laying lock screw too, the two ends of screw hole are designed to horn mouth on the small end screw rod;
Described lock screw is made up of screw rod and cylindrical locking nail, and an end of screw rod is designed to hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205207823U CN202365902U (en) | 2011-12-14 | 2011-12-14 | Lock-mounted axial infusion internal fixator for lumbosacral vertebrae |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205207823U CN202365902U (en) | 2011-12-14 | 2011-12-14 | Lock-mounted axial infusion internal fixator for lumbosacral vertebrae |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202365902U true CN202365902U (en) | 2012-08-08 |
Family
ID=46589628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205207823U Expired - Fee Related CN202365902U (en) | 2011-12-14 | 2011-12-14 | Lock-mounted axial infusion internal fixator for lumbosacral vertebrae |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202365902U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104173099A (en) * | 2014-08-29 | 2014-12-03 | 南华大学 | Locking screw of minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system |
-
2011
- 2011-12-14 CN CN2011205207823U patent/CN202365902U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104173099A (en) * | 2014-08-29 | 2014-12-03 | 南华大学 | Locking screw of minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20141214 |
|
| EXPY | Termination of patent right or utility model |