CN202270059U - One-way automatically distracting pedicle screw for correcting and fixing vertebral column - Google Patents
One-way automatically distracting pedicle screw for correcting and fixing vertebral column Download PDFInfo
- Publication number
- CN202270059U CN202270059U CN2011203081322U CN201120308132U CN202270059U CN 202270059 U CN202270059 U CN 202270059U CN 2011203081322 U CN2011203081322 U CN 2011203081322U CN 201120308132 U CN201120308132 U CN 201120308132U CN 202270059 U CN202270059 U CN 202270059U
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- nail
- head
- pedicle screw
- packing washer
- nail body
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Abstract
The utility model relates to a one-way automatically distracting pedicle screw for correcting and fixing a vertebral column, comprising a nail cap, a packing washer and a nail body, wherein the nail body passes through the nail cap and is limited and fixed through the packing washer; a U-shaped deep groove is formed on the nail cap; inner threads are arranged at inner walls of two sides of the deep groove; and grooves which are vertical to an axial direction of the nail cap are formed on two lateral walls; a round runway hole and a single-side horn mouth are formed on the tail end of the nail cap; the U-shaped groove is formed on the packing washer; a joint between a nail head and the nail body is composed of a column and a round table; and the column part coordinates with the round runway hole and the horn mouth on the tail end of the nail cap to realize single-plane movement. The one-way automatically distracting pedicle screw provided by the utility model has the advantages that: single-plane movement can be realized; movement degree between the nail body and a nut is determined by size of an opening of the horn mouth; single-plane screws with different movement degree requirements are designed as to different requirements of operations; and the nail bodies with different diameters and lengths are provided according to difference of thread sizes of multiple specifications of the nail bodies, and are applied to different occasions.
Description
[technical field]
This utility model relates to the orthopedic medical device technical field, specifically, is a kind of backbone correcting and fixed unidirectional automatic distraction pedicle screw of being used for.
[background technology]
At present traffic stud rod internal fixation system carries out resetting and fixing of skeleton aspect spinal injury and treatment of diseases, being widely used behind the spinal column.Usually securing members such as pedicle screw, hook are implanted and fixed, connect through pitman and play a supportive role with vertebral body.
Used traditional in the past single shaft pedicle screw to carry out fixture, if to carry out 2 above vertebral bodys fixedly the time, Chang Yinyi side pedicle screw is implanted back head of a nail direction and is fixed, head of a nail U type groove is not placed the pitman very difficulty that seems not making with straight line.Regular meeting makes pedicle nail take place to become flexible if place also by force in some osteoporotic cases.Particularly the Different Plane vertebral body is carried out fixed situation for needs; As when treating scoliosis; Fixedly the time, need allow the mobility in certain plane, use uni-axial screws not allow to carry out any adjustment, this is very inconvenience concerning operation technique; Usually need screw directly be fixed on different plane, put into so that pitman can well connect.Nonetheless, also can't satisfy the active requirement in monoplane well.
And universal pedicle screw has overcome above drawback, because its universal characteristic is promptly followed closely the three-dimensional rotation that can make certain angle between body and head of a nail U-lag, makes the associating of nail-rod very easy.Can not fully on same straight line, also can pass through the direction and the angle of the U type groove of adjustment screw even implant the screw of the same side,, reduce curved excellent difficulty to cooperate inserting of rod.But limit it only in the situation of monoplane motion for carrying out like this needs of scoliosis, adopt the mobility of universal its permission of pedicle screw excessive again.
Therefore, single shaft pedicle screw and universal pedicle screw exist its drawback at present, all can not satisfy situation about requiring like this only needs of scoliosis monoplane mobility at present well.
[utility model content]
The purpose of this utility model is to overcome the deficiency of prior art, and a kind of backbone correcting and fixed unidirectional automatic distraction pedicle screw of being used for is provided.
The purpose of this utility model realizes through following technical scheme:
A kind of backbone correcting and fixed unidirectional automatic distraction pedicle screw of being used for is made up of the head of a nail, packing washer and nail body, and the nail body passes the head of a nail, and spacing fixing through packing washer.
The described head of a nail has U moldeed depth groove, and deep trouth both sides inwall is provided with female thread, and has on the two side and the axial vertical groove of the head of a nail; Wherein, head of a nail lower end is provided with spherical mortar cup I, and has circular runway shape hole and one-sided horn mouth endways, moves in the monoplane in order to restriction nail body.
Described packing washer has U type groove, and the two edges convexity is stuck in the groove of the head of a nail in order to spacing, and the packing washer lower end is provided with spherical mortar cup II.
Described nail body head is provided with spherical mortar body and inner hexagonal hole, and spherical mortar end of body is provided with some steps, and the spherical mortar body of nail body head and the spherical mortar cup II on spherical mortar cup I on the head of a nail and the packing washer are slidingly matched; Nail body body portion is provided with the reducing screw thread; The nail body is made up of a cylinder and round platform with nail body head junction, and wherein, column part matches with terminal circular racetrack hole and the one-sided horn mouth of the head of a nail, realizes the motor function of screw in the monoplane.
The assemble flow of this utility model is: at first will follow closely the circular runway through hole that body passes the head of a nail, its bulb mortar body cooperates with the spherical mortar cup I of the head of a nail; Packing washer is snapped in, like Fig. 2, the spherical mortar cup II of packing ring cooperates with the spherical mortar body of nail body again, and the two edges convexity is stuck in the groove of the head of a nail.Assembling back nail body and packing washer can not be deviate from from the head of a nail, and assembling back nail body should be able to be realized the monoplane swing on the head of a nail.
This utility model can be applicable to backbone correcting and technical field such as fixing.
Compared with prior art, the good effect of this utility model is:
This utility model can be realized the monoplane motion, when rod presses down, can strut automatically.
Mobility between this utility model nail body and nut is determined by bell-mouthed openings of sizes, for the operation of different demands, can design the monoplane screw that different mobilities require.
This utility model can have plurality of specifications according to the difference of nail body thread size, is furnished with the nail body of different-diameter and length, is applicable to different occasions.
[description of drawings]
The schematic three dimensional views of Fig. 1 this utility model; Figure 1A struts and neutral condition contrast sketch map one for it, and 1B struts and neutral condition contrast sketch map two for it;
System's installation diagram of Fig. 2 this utility model;
Fig. 3 this utility model assembly 1---head of a nail sketch map; 3A is a schematic three dimensional views one, and 3B is a schematic three dimensional views two, and 3C is a front view, and 3D is the section right view;
Fig. 4 this utility model assembly 2---packing washer sketch map; 4A is a schematic three dimensional views one, and 4B is a schematic three dimensional views two;
Fig. 5 this utility model assembly 3---nail body sketch map; 5A is a schematic three dimensional views, and 5B is a front view;
Label in the accompanying drawing is respectively: 1, the head of a nail, 2, packing washer, 3, the nail body, 4, U moldeed depth groove, 5, female thread; 6, groove, 7, spherical mortar cup I, 8, circular runway shape hole, 9, horn mouth, 10:U type groove; 11, convexity, 12, spherical mortar cup II, 13, spherical mortar body, 14, cylinder; 15, round platform, 16, the reducing screw thread, 17, inner hexagonal hole, 18, step.
[specific embodiment]
Below provide this utility model a kind of specific embodiment that is used for backbone correcting and fixed unidirectional automatic distraction pedicle screw.
Embodiment 1
Accompanying drawing 1A, 1B are the schematic three dimensional views of this utility model.This utility model is a kind of backbone correcting and fixed unidirectional automatic distraction pedicle screw of being used for; Single shaft pedicle screw different from the past and universal pedicle screw; It allows to move in the monoplane; Like accompanying drawing 1A, 1B, the nail body is implanted the back head of a nail can realize the mobility with respect to the center line certain angle.
Accompanying drawing 2 is system's installation diagram of this utility model.Accompanying drawing 3A, 3B, 3C, 3D, 4A, 4B, 5A, 5B are respectively the sketch map of this utility model three assemblies.This utility model is made up of the head of a nail 1, packing washer 2 and nail body 3.Nail body 3 passes the head of a nail 1, and spacing fixing through packing washer 2.The head of a nail 1 is provided with U moldeed depth groove 4, in order to put pitman; The deep trouth inboard is provided with female thread 5, compresses plug screw and can carry out the fixing of pitman through what screw-in was complementary; Two medial walls have groove 6, are used for carrying out spacing to packing washer 2; Head of a nail lower end is provided with spherical mortar cup I 7, cooperates with nail body bulb 13, makes system can as universal nail, carry out activity; Head of a nail end has circular runway hole 8 and one-sided horn mouth 9, cooperates the one-way movement of accomplishing screw with the nail body.Packing washer 2 is provided with U type groove 10, in order to cooperate with pitman, under the effect that compresses plug screw, carries out the fixing of screw; The packing ring two edges are provided with convexity 11, are stuck in the groove 6 of the head of a nail two medial walls, and recess width is slightly larger than ledge width, so that packing ring can axially carry out minute movement; The packing ring lower end is provided with spherical mortar cup II 12, cooperate with nail body bulb 13, but under the effect of power the staple body portion.Nail body head is a spherical mortar body 13, and there are some steps 18 end, is used for and being fixed and clamped of packing ring mortar cup; Nail body head end is provided with inner hexagonal hole 17, is used for being connected with last nail device; The nail body is provided with screw thread 16; Nail body head is provided with a cylinder 14 and a round platform 15 with nail body connecting portion, and column part 14 cooperates with the terminal circular runway hole 8 of the head of a nail, realized one-way movement, and the openings of sizes of horn mouth 9 has determined the activity point of view of one-way movement.
This utility model is because the unique design structure at its head of a nail place, top; Can accomplish one-way movement; In the process of infra pressure bar; Automatically strut towards a direction, pitman can through this pedicle screw that has unidirectional mobility connect at an easy rate adjacent two not conplane vertebral body, and need not to apply extra moment of torsion.To some specific spinal disease, need carry out manual work adjustment or localized spinal disease when treating (like skoliosis) to spinal column like some, adopt this kind screw can realize easily that rod fixes with being connected of screw.
The above only is the preferred implementation of this utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from this utility model design; Can also make some improvement and retouching, these improvement and retouching also should be regarded as in the protection domain of this utility model.
Claims (7)
1. one kind is used for backbone correcting and fixed unidirectional automatic distraction pedicle screw, it is characterized in that, is made up of the head of a nail, packing washer and nail body, and the nail body passes the head of a nail, and spacing fixing through packing washer.
2. a kind of backbone correcting and fixed unidirectional automatic distraction pedicle screw of being used for as claimed in claim 1 is characterized in that the described head of a nail has U moldeed depth groove, and deep trouth both sides inwall is provided with female thread, and has on the two side and the axial vertical groove of the head of a nail.
3. a kind of backbone correcting and fixed unidirectional automatic distraction pedicle screw of being used for as claimed in claim 1 is characterized in that described head of a nail lower end is provided with spherical mortar cup I, and has circular runway shape hole and one-sided horn mouth endways.
4. a kind of backbone correcting and fixed unidirectional automatic distraction pedicle screw of being used for as claimed in claim 1 is characterized in that described packing washer has U type groove, and the two edges convexity is stuck in the groove of the head of a nail.
5. a kind of backbone correcting and fixed unidirectional automatic distraction pedicle screw of being used for as claimed in claim 1 is characterized in that described packing washer lower end is provided with spherical mortar cup II.
6. a kind of backbone correcting and fixed unidirectional automatic distraction pedicle screw of being used for as claimed in claim 1; It is characterized in that; Described nail body head is provided with spherical mortar body and inner hexagonal hole; Spherical mortar end of body is provided with some steps, and the spherical mortar body of nail body head and the spherical mortar cup II on spherical mortar cup I on the head of a nail and the packing washer are slidingly matched; Nail body body portion is provided with the reducing screw thread; The nail body is made up of a cylinder and round platform with nail body head junction.
7. a kind of backbone correcting and fixed unidirectional automatic distraction pedicle screw of being used for as claimed in claim 6 is characterized in that, described column part matches with terminal circular racetrack hole and the one-sided horn mouth of the head of a nail, and the restriction screw moves in the monoplane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203081322U CN202270059U (en) | 2011-08-23 | 2011-08-23 | One-way automatically distracting pedicle screw for correcting and fixing vertebral column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203081322U CN202270059U (en) | 2011-08-23 | 2011-08-23 | One-way automatically distracting pedicle screw for correcting and fixing vertebral column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202270059U true CN202270059U (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203081322U Expired - Fee Related CN202270059U (en) | 2011-08-23 | 2011-08-23 | One-way automatically distracting pedicle screw for correcting and fixing vertebral column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202270059U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014005378A1 (en) * | 2012-07-06 | 2014-01-09 | 常州市康辉医疗器械有限公司 | Minimally invasive and percutaneous internal fixation device |
-
2011
- 2011-08-23 CN CN2011203081322U patent/CN202270059U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014005378A1 (en) * | 2012-07-06 | 2014-01-09 | 常州市康辉医疗器械有限公司 | Minimally invasive and percutaneous internal fixation device |
| CN103519876A (en) * | 2012-07-06 | 2014-01-22 | 常州市康辉医疗器械有限公司 | Internal fixing device for minimally-invasive percutaneous penetration |
| CN103519876B (en) * | 2012-07-06 | 2015-07-15 | 常州市康辉医疗器械有限公司 | Internal fixing device for minimally-invasive percutaneous penetration |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20190823 |