CN2820112Y - Pedicle of vertebral arch screw - Google Patents
Pedicle of vertebral arch screw Download PDFInfo
- Publication number
- CN2820112Y CN2820112Y CN 200520087471 CN200520087471U CN2820112Y CN 2820112 Y CN2820112 Y CN 2820112Y CN 200520087471 CN200520087471 CN 200520087471 CN 200520087471 U CN200520087471 U CN 200520087471U CN 2820112 Y CN2820112 Y CN 2820112Y
- Authority
- CN
- China
- Prior art keywords
- screw
- pedicle
- vertebral arch
- utility
- model
- 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.)
- Expired - Fee Related
Links
- 238000010079 rubber tapping Methods 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000000693 hamate bone Anatomy 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 208000015122 neurodegenerative disease Diseases 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Images
Abstract
The utility model relates to a vertebral arch pedicle screw which comprises a self-tapping screw thread rod and a screw head part, wherein the screw head is provided with a groove hole for installing and connecting a rod, and the groove is provided with inner screw threads. The inner screw threads of the groove hole at the head part of the screw is striction type screw threads. An angle A of the screwing in direction is positive 20 DEG to 60 DEG, and the angle B of the other end surface is 0 DEG to negative 15 DEG. A pulling groove is also arranged on one side wall of the groove hole of the screw head part. A structure is simple, supporting force is strong, and the internal fixation of a vertebral arch pedicle is firm. The connections with a connecting rod, etc., are reliable. A screw plug is screwed in the groove hole to generate the component force which faces to the center, the tension for a side wall is reduced, and a tooth and a wire are not easy to stagger and slide to cause looseness. The side wall at the head part of the screw can not be supported. The utility model is suitable for the installation and the fixation in the vertebral arch pedicle and is used for the correction and the internal fixation of a spinal column in the mode that the utility model is connected with the connecting rod.
Description
Technical field
This utility model relates to a kind of bone surgery medical apparatus, specifically a kind of pedicle screw that is used for backbone correcting and internal fixation.
Background technology
We know, at present, to the disease of spinal trauma, slippage, degenerative disease and other unstable spine, adopt the spinal fixation device to fix more.Existing spinal fixation device is more, mainly contains the Ha Shi rod, and apparatuses such as Shandong Ge Shi rod are installed composition by pedicle screw, universal pedicle screw, hamulus of hamate bone etc.Existing pedicle screw and hamulus of hamate bone etc. are unreliable with being connected of pitman, and are easily loosening, the stripped thread and strut head side wall of grinding one's teeth easily, and then usually fracture or buckling phenomenon appear, and operation wound is big, fixedly owes firm, and the complication that causes thus is more.
Summary of the invention
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of simple in structure, and support force is strong, firm at the pedicle of vertebral arch internal fixation, be connected reliably with pitman, plug screw etc., the stripped thread that is difficult for grinding one's teeth causes becoming flexible, stressed rational pedicle screw.
The technical scheme in the invention for solving the above technical problem is: a kind of pedicle screw, it comprises self-tapping screw bar and screw head, screw head has the slotted eye that pitman is installed, slotted eye is provided with female thread, the female thread that it is characterized in that the screw head slotted eye is for tightening up the type screw thread, its angle A that is screwed into direction is positive 20-60 degree, and other end angle B negative 15 degree that are 0-.
The sidewall of screw head slotted eye described in the utility model is provided with and lifts groove.
The female thread of this utility model screw head slotted eye is for tightening up the type screw thread, against existing technologies, it is simple in structure, and support force is strong, and is firm at the pedicle of vertebral arch internal fixation, be connected reliably with pitman, plug screw etc., plug screw is pushed down pitman and is screwed into the axial force that produces behind the slotted eye and reacts on the type screw thread negative angle face that tightens up, and produces the component to the center, has reduced the tension force of oppose side wall, the stripped thread that is difficult for grinding one's teeth causes becoming flexible, and can not strut the sidewall of screw head.This utility model is suitable for installing and fixing in pedicle of vertebral arch, is used for backbone correcting and internal fixation by being connected with pitman.
Description of drawings
The utility model will be further described below in conjunction with accompanying drawing:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that cuing open of Fig. 1 shown sketch map;
Fig. 3 is the local enlarged diagram of Fig. 2.
1. self-tapping screw bars among the figure, 2. screw head, 3. slotted eye, 4. female thread 5. lifts groove.
The specific embodiment
From Fig. 1, Fig. 2 as can be seen, a kind of pedicle screw of this utility model, it comprises self-tapping screw bar 1 and screw head 2, self-tapping screw bar 1 is in pedicle of vertebral arch.Self-tapping screw bar 1 and screw head 2 can integrative-structures, also can adopt the form of universal connection, become universal pedicle screw.Screw head 2 has the slotted eye 3 that pitman is installed, and is used for pushing down installation pitman etc. by plug screw.
Characteristics of the present utility model are: slotted eye 3 is provided with female thread 4, and female thread 4 is for tightening up the type screw thread, and its direction that is screwed into is an angle A, and this angle A is positive 20-60 degree, and other end (force side after compressing) is angle B, and this angle B is negative 15 degree of 0-.Like this, itself and be provided with corresponding externally threaded plug screw and cooperate, can well fixedly mount pitman, and tighten up function.Use when installing, be screwed into the plug screw that matches after in the slotted eye 3 of screw head 2, putting into pitman, plug screw is pushed down the axial force that produces behind the pitman and is reacted on the type screw thread negative angle face that tightens up, generation is to the component at center, produce the effect of tightening up so tighten the back to the center, reduced the tension force of oppose side wall, the stripped thread that is difficult for grinding one's teeth causes becoming flexible, and can not strut the sidewall of screw head.Its anti-loosing effect is remarkable, and the stress that pedicle nail or universal pedicle nail sidewall is produced can reduce to lock the time makes structure safety and stability more, can reduce top installation system head volume under the prerequisite of sufficient intensity keeping, and prevents to strut sidewall.
The sidewall of screw head 2 slotted eyes 3 described in the utility model is provided with and lifts groove 5.Lift groove 5 and be rectangle or ellipse garden shape, and be provided with the degree of depth of 0.3-1.8 millimeter.The pitman diameter is different to be changed length according to selecting for use.Lift that groove 5 is used for and specific purpose tool cooperates, snap in this with specific purpose tool and lift and to carry out pressure bar behind the groove and reset, after specific purpose tool snaps in, have and well control function.
The female thread of this utility model screw head slotted eye is for tightening up the type screw thread, and it is simple in structure, and support force is strong, and is firm at the pedicle of vertebral arch internal fixation, is connected reliably with pitman, plug screw etc., and the stripped thread that is difficult for grinding one's teeth causes becoming flexible, and can not strut the sidewall of screw head.This utility model is suitable for installing and fixing in pedicle of vertebral arch, is used for backbone correcting and internal fixation by being connected with pitman.
Claims (3)
1, a kind of pedicle screw, it comprises self-tapping screw bar and screw head, screw head has the slotted eye that pitman is installed, slotted eye is provided with female thread, the female thread that it is characterized in that the screw head slotted eye is for tightening up the type screw thread, its angle A that is screwed into direction is positive 20-60 degree, and other end angle B negative 15 degree that are 0-.
2, pedicle screw as claimed in claim 1 is characterized in that: the sidewall of screw head slotted eye is provided with and lifts groove.
3, pedicle screw as claimed in claim 2 is characterized in that: lifting groove is rectangle or ellipse garden shape, and is provided with the degree of depth of 0.3-1.8 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087471 CN2820112Y (en) | 2005-09-22 | 2005-09-22 | Pedicle of vertebral arch screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520087471 CN2820112Y (en) | 2005-09-22 | 2005-09-22 | Pedicle of vertebral arch screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2820112Y true CN2820112Y (en) | 2006-09-27 |
Family
ID=37016660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520087471 Expired - Fee Related CN2820112Y (en) | 2005-09-22 | 2005-09-22 | Pedicle of vertebral arch screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2820112Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103179912A (en) * | 2010-10-27 | 2013-06-26 | 华沙整形外科股份有限公司 | Low profile extension attachments for bone anchors |
-
2005
- 2005-09-22 CN CN 200520087471 patent/CN2820112Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103179912A (en) * | 2010-10-27 | 2013-06-26 | 华沙整形外科股份有限公司 | Low profile extension attachments for bone anchors |
| CN103179912B (en) * | 2010-10-27 | 2015-09-09 | 华沙整形外科股份有限公司 | Low profile for bone anchor locking member extends attachment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060927 Termination date: 20120922 |