CN203328785U - Low-incisura simple universal vertebral pedicle screw - Google Patents
Low-incisura simple universal vertebral pedicle screw Download PDFInfo
- Publication number
- CN203328785U CN203328785U CN2012205970388U CN201220597038U CN203328785U CN 203328785 U CN203328785 U CN 203328785U CN 2012205970388 U CN2012205970388 U CN 2012205970388U CN 201220597038 U CN201220597038 U CN 201220597038U CN 203328785 U CN203328785 U CN 203328785U
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- screw
- briquetting
- incisura
- pedicle screw
- low
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Abstract
The utility model provides a low-incisura simple universal vertebral pedicle screw. The vertebral pedicle screw comprises a screw body, a screw cap and a pressing block. The low-incisura simple universal vertebral pedicle screw is characterized in that the screw body is provided with a semi-circular screw head, the screw head can lower an incisura, an U-shaped groove hole used for installing a connecting bar is formed in the screw cap, the U-shaped groove hole is provided with internal threads, an inner round groove is formed in the connecting position between the screw cap and the screw body so as to enable a bone rongeur not to be used during operation, a pressing block pressing groove is formed in the connecting position between the screw cap and the pressing block so that the pressing block can be prevented from dropping out, an opening groove used for installing the connecting bar is formed in the pressing block, and an anti-dropping pressing block locking ring is arranged on the pressing block. When installed during operation, the low-incisura simple universal vertebral pedicle screw is firstly implanted into the centrum, the connecting bar is placed into the U-shaped groove of the screw cap, a locking jack screw is screwed into the upper portion of the connecting bar, and downward pressure generated by the locking jack screw is sequentially transmitted to the semi-circular screw head of the screw body to realize angle locking and fixing. Therefore, the low-incisura simple universal vertebral pedicle screw can realize simple surgical operation, is low in incisura, and can guarantee safety and effectiveness of universal locking more simply and effectively.
Description
Technical field
The present invention relates to a kind of bone surgery medical apparatus, be specifically related to a kind of for backbone correcting and interior fixing low incisura simple universal pedicle screw.
Background technology
At present, for spinal trauma, slippage, degenerative disease and other single hops or several sections of fracture postcentrum shakiness, adopt spinal column internal fixation device to fix more.Present holder kind on the market is more, but major part is all passed through other corresponding components compositions such as pedicle screw, pedicle of vertebral arch Universal screw nail, pitman.Universal pedicle screw resets by lifting, and pedicle screw and internal fixation bar etc. are contacted firmly.Existing Universal pedicle screw is comprised of screw, the head of a nail, briquetting, in operation process, for activity easy for installation, that do not affect the universal head of a nail, often need to sting bone, and be subject to the structural limitations incisura higher.Make like this operation wound large, healing is slow, easily causes the complication of wound face.The structure that simultaneously general restriction briquetting is deviate from the market is to make a call to two blind holes at the head of a nail and both sides corresponding to briquetting, pack into after screw and briquetting and squeeze out the blind hole that two raised points head into briquetting by apparatus in the blind hole of the head of a nail, under normal circumstances restricted briquetting axially movable the assurance do not come off, but in practical operation, extruding force and the protruding degree of depth all can not get accurately controlling and cause briquetting to occur that stuck or phenomenon that deviate from happens occasionally.The clinical practice of Universal pedicle screw exists many disadvantages as can be seen here.
Summary of the invention
For solving the problem existed in above-mentioned technology, the purpose of this invention is to provide a kind of low incisura simple universal pedicle screw.Above-mentioned low incisura simple universal vertebral pedicle bolt structure is simple, incisura is low, universal structure is simple and easy stable, during operation, without stinging bone, just can guarantee the motility of the head of a nail.
For achieving the above object, the technical solution used in the present invention is to provide a kind of low incisura simple universal pedicle screw, above-mentioned pedicle screw comprises screw, the head of a nail, briquetting, it is characterized in that screw is provided with the semicircle ailhead, this ailhead can reduce incisura, the head of a nail has U-shaped groove, U-shaped groove that pitman is installed and is provided with female thread, have the indent circular groove with the screw junction, while making to perform the operation without stinging bone, and the briquetting junction is provided with the briquetting indent can prevent that briquetting from deviating from, briquetting is provided with open slot that pitman is installed and the briquetting retainer of Anti-extrusion.
The present invention hangs down incisura simple universal pedicle screw, and against existing technologies, it is simple in structure, easy to process.Screw is provided with the semicircle ailhead, it is characterized in that the semicircle ailhead can make the Universal pedicle screw incisura reduce by 1/2 ailhead height; The head of a nail has U-shaped slotted eye, U-shaped slotted eye that pitman is installed and is provided with female thread, have the indent circular groove with the screw junction, it is characterized in that this indent circular groove in when operation without removing little joint, the indent circular groove is just in time relative with the U-shaped groove of the head of a nail simultaneously, can effectively reduce to machine the reducing that rear U-shaped groove is caused by stress.The head of a nail and briquetting junction are provided with the briquetting indent that the restriction briquetting is deviate from; Briquetting is provided with the briquetting retainer and the open slot of pitman is installed, the external diameter that it is characterized in that the briquetting retainer is slightly larger than the briquetting indent internal diameter on the cap of top, can produce elastic deformation when briquetting is packed in conjunction with the open slot on briquetting, pack into after by briquetting indent restriction can't deviate from again, simultaneously unrestricted in the axial direction.Therefore low incisura simple universal pedicle screw can provide lower incisura for operation, and can reduce wound face and can simplify operation technique again without stinging bone during operation.Brand-new briquetting locking theory allows processing is more simple, structure stability and safety more.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is head of a nail structural representation;
Fig. 3 is the bolt structure schematic diagram;
Fig. 4 is the briquette structure schematic diagram;
Fig. 5 is the briquetting partial enlarged drawing.
In figure:
1, screw 2, semicircle ailhead 3, the head of a nail 4, female thread
5, locking jackscrew 6, pitman 7, briquetting 8, indent circular groove
9, briquetting indent 10, U-shaped groove 11, open slot 12, briquetting retainer
The specific embodiment:
By reference to the accompanying drawings the structure of the low incisura simple universal pedicle screw of the present invention is illustrated.
As shown in drawings, above-mentioned low incisura simple universal pedicle screw comprises screw (1), the head of a nail (3), briquetting (7).Screw (1) is provided with semicircle ailhead (2) can reduce incisura, the head of a nail (3) has U-shaped groove (10), U-shaped groove (10) that pitman (6) is installed and is provided with female thread (4), have indent circular groove (8) with screw (1) junction, while making to perform the operation without stinging bone, be provided with briquetting indent (9) with briquetting (7) junction and can prevent that briquetting (7) from deviating from, briquetting (7) is provided with open slot (11) that pitman (6) is installed and the briquetting retainer (12) of Anti-extrusion.
The present invention is low, and incisura simple universal pedicle screw is achieved in that
Screw (1) is provided with semicircle ailhead (2), and semicircle ailhead (2) can make the Universal pedicle screw incisura reduce by 1/2 ailhead height, thus can reduce the head of a nail (3) 1/2 ailhead height, thus can reduce incisura.The head of a nail (3) has indent circular groove (8) with screw (1) junction, this indent circular groove (8) is installed time in operation and is taken up space and greatly reduce, without bone is stung in contiguous position, just can realize the motility of the head of a nail (3), and while indent circular groove (8) is just in time relative with the U-shaped groove (10) of the head of a nail (3) can reduce to machine the reducing that rear U-shaped groove (10) is caused by stress effectively.The head of a nail (3) is provided with briquetting (7) junction the briquetting indent (9) that restriction briquetting (7) is deviate from, briquetting (7) is provided with briquetting retainer (12) and the open slot (11) of pitman is installed, the external diameter of briquetting retainer (12) is slightly larger than briquetting indent (9) internal diameter on top cap (3), briquetting (7) while packing into because open slot (11) can produce elastic deformation, pack into after external diameter briquetting (7) because the internal diameter of briquetting indent (9) is greater than briquetting retainer (12) can't deviate from again, simultaneously unrestricted in the axial direction.
During low incisura simple universal pedicle screw assembling, the circular hole by screw (1) through the head of a nail (3) lower end, be pressed into briquetting (7).First will hang down incisura simple universal pedicle screw and implant vertebral body when operation is installed, put into pitman (6) in the U-shaped groove (10) of the head of a nail (3), screw in locking jackscrew (5) in the top of pitman (6), lock as shown in Figure 1 after jackscrew (5) screws in to produce on the semicircle ailhead (2) that downward pressure is sent to screw (1) successively and realize that angle lock fastens.So low incisura simple universal pedicle screw can realize that operation technique is simple, incisura is low, again can more simple and effective assurance universal lock safe and effective.
Claims (3)
1. one kind low incisura simple universal pedicle screw, screw is wherein used the semicircle ailhead, it is characterized in that the semicircle ailhead can make the Universal pedicle screw incisura reduce by 1/2 ailhead height.
2. low incisura simple universal pedicle screw according to claim 1, it is characterized in that head of a nail bottom position is provided with indent circular groove, when operation without removing little joint, the indent circular groove is just in time relative with the U-shaped groove of the head of a nail simultaneously, can effectively reduce to machine the reducing that rear U-shaped groove is caused by stress.
3. low incisura simple universal pedicle screw according to claim 1, it is characterized in that the head of a nail and briquetting junction are provided with the briquetting indent that the restriction briquetting is deviate from, briquetting is provided with the briquetting retainer and the open slot of pitman is installed, the external diameter of briquetting retainer is slightly larger than the briquetting indent internal diameter on the cap of top, can produce elastic deformation when briquetting is packed in conjunction with the open slot on briquetting, pack into after by briquetting indent restriction can't deviate from again, simultaneously unrestricted in the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205970388U CN203328785U (en) | 2012-11-14 | 2012-11-14 | Low-incisura simple universal vertebral pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205970388U CN203328785U (en) | 2012-11-14 | 2012-11-14 | Low-incisura simple universal vertebral pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203328785U true CN203328785U (en) | 2013-12-11 |
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ID=49697493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205970388U Expired - Lifetime CN203328785U (en) | 2012-11-14 | 2012-11-14 | Low-incisura simple universal vertebral pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203328785U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016150351A1 (en) * | 2015-03-24 | 2016-09-29 | 昆明医科大学第二附属医院 | Self-adaptable pediculate screw |
| WO2016150352A1 (en) * | 2015-03-24 | 2016-09-29 | 昆明医科大学第二附属医院 | Low-profile pedicle screw with adjustment control function |
| CN106037993A (en) * | 2016-07-08 | 2016-10-26 | 北京大学人民医院 | Sacrum prosthesis |
-
2012
- 2012-11-14 CN CN2012205970388U patent/CN203328785U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016150351A1 (en) * | 2015-03-24 | 2016-09-29 | 昆明医科大学第二附属医院 | Self-adaptable pediculate screw |
| WO2016150352A1 (en) * | 2015-03-24 | 2016-09-29 | 昆明医科大学第二附属医院 | Low-profile pedicle screw with adjustment control function |
| CN106037993A (en) * | 2016-07-08 | 2016-10-26 | 北京大学人民医院 | Sacrum prosthesis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |