CN210541781U - Pedicle screw - Google Patents
Pedicle screw Download PDFInfo
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- CN210541781U CN210541781U CN201920695662.3U CN201920695662U CN210541781U CN 210541781 U CN210541781 U CN 210541781U CN 201920695662 U CN201920695662 U CN 201920695662U CN 210541781 U CN210541781 U CN 210541781U
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- nail seat
- positioning
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- seat
- extension
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Abstract
The utility model relates to a pedicle screw, including extension piece, nail seat, extension piece coupling mechanism and bulb nail, the nail seat is connected with bulb nail assembly, and its innovation point lies in: the two extension pieces are rigid extension pieces, are oppositely arranged on two sides of the nail seat and are detachably connected with the nail seat through an extension piece connecting mechanism; extension piece coupling mechanism includes connective bar and jackscrew, the jackscrew is established in the nail seat, and the jackscrew simultaneously with extension piece and nail seat threaded connection, the connective bar radially passes the nail seat, and the connective bar is located the jackscrew below and offsets rather than. The utility model discloses not only conveniently separate extension piece and nail seat, extension piece can not produce broken face or sharp blade with nail seat after-separating moreover.
Description
Technical Field
The utility model particularly relates to a pedicle screw suitable for backbone percutaneous wicresoft system uses belongs to apparatus technical field for the orthopedics art.
Background
Compared with the traditional open surgery with large trauma, high risk and long recovery period, the spine minimally invasive surgery for the patients with the spine diseases has the advantages of small tissue damage, quick recovery, low cost, good psychological effect of the patients and the like.
Currently, the structure of the pedicle screws in the prior art has the following drawbacks:
firstly, because two extension pieces in the pedicle screw are of a C-shaped integrated structure and are of a semi-open structure, the operation space is greatly limited, the opening area on a human body cannot be increased, rod penetration is convenient, the operation wound of a patient is large, and the recovery period is long;
secondly, the traditional extension pieces are all flexible extension pieces which are plastic products (such as PPSU plastic), when the flexible extension pieces are placed in a patient body, the flexible extension pieces can harm the human body, particularly, when the operation is performed, the extension pieces need to be lifted, and in the process, the flexible extension pieces can be distorted and deformed, so that the strength is lost, and the effects of correcting and resetting the spine of the patient are greatly influenced;
the third, because be equipped with the extension section rather than each other as an organic whole on the nail seat, and the transition linking department of extension section and nail seat body is equipped with the opening, flexible extension piece and the extension section assembled connection of nail seat, after the operation is accomplished, utilize specialized tool to follow the opening department extension section of breaking, and flexible extension piece is taken off in the parallel connection area, and the nail seat is kept somewhere the human body in, operation time has not only been increased like this, and the extension section can be kept over defects such as broken face or sharp blade after breaking from the nail seat, this defect can be produced after the operation and irritated, also constantly amazing muscle recovery, lead to patient's wound to resume slowly.
Disclosure of Invention
The utility model aims at: the pedicle screw is convenient to separate the extension piece from the screw seat, and the broken surface or the sharp cutting edge cannot be generated after the extension piece is separated from the screw seat.
In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a pedicle screw, includes extension piece, nail seat, extension piece coupling mechanism and bulb nail, nail seat and bulb nail assembly are connected, and its innovation point lies in:
a. the two extension pieces are rigid extension pieces, are oppositely arranged on two sides of the nail seat and are detachably connected with the nail seat through an extension piece connecting mechanism;
b. extension piece coupling mechanism includes connective bar and jackscrew, the jackscrew is established in the nail seat, and the jackscrew simultaneously with extension piece and nail seat threaded connection, the connective bar radially passes the nail seat, and the connective bar is located the jackscrew below and offsets rather than.
In the above technical scheme, one end of the extension piece is provided with the elastic piece arranged along the axial direction of the extension piece, the inner wall of the elastic piece is provided with the positioning protrusion, the outer wall of the nail seat is provided with the positioning pit, and the positioning protrusion of the elastic piece is arranged in the positioning pit of the nail seat.
In the technical scheme, an axial guide rail is arranged at the end part of one end of the extension piece, a guide rail groove is formed in the side wall of the nail seat, and the axial guide rail of the extension piece is in sliding fit with the guide rail groove of the nail seat.
In the technical scheme, the end part of the nail seat and the position close to the guide rail groove are provided with the guide inclined plane, and the axial guide rail of the extension piece is in sliding fit with the guide rail groove of the nail seat through the guide inclined plane.
In the above technical solution, the positioning protrusion of the elastic sheet is a circular protrusion, or a square protrusion, or a triangular protrusion.
In the technical scheme, a ball stud reversing and positioning mechanism is arranged in the stud seat and comprises a positioning clamping seat, a positioning connecting sheet and a retaining gasket, the positioning connecting sheet is located between the positioning clamping seat and the retaining gasket, the positioning clamping seat is in threaded connection with the positioning connecting sheet, the ball stud is provided with a ball head part integrated with the ball stud, and the ball head part of the ball stud is in threaded connection with an inner spherical surface of the positioning clamping seat.
In the above technical scheme, the end face of the positioning clamping seat is provided with a plurality of separately arranged positioning bosses, the retaining gasket is provided with a positioning bayonet, the retaining gasket is clamped on the positioning connection piece, and the positioning bosses of the positioning clamping seat are clamped in the positioning bayonet of the retaining gasket.
In the above technical scheme, the extension sheet is in an arc sheet shape, and the extension sheet is a titanium alloy rigid extension sheet or a stainless steel rigid extension sheet.
The utility model discloses the positive effect who has is: after the rigid extension piece and the pedicle screw are adopted, because the extension piece of the utility model is provided with two pieces, and the extension pieces are rigid extension pieces, the two extension pieces are oppositely arranged at two sides of the screw seat, and the two extension pieces are detachably connected with the screw seat through the extension piece connecting mechanism; the advantages of such a structure are: one of the rigid extension pieces of the utility model is provided with a left piece and a right piece which are respectively inserted at the two sides of the nail seat and are of an open structure, when a rod (a connecting rod) is penetrated, the connecting rod is only required to be directly inserted between the two extension pieces and directly enter the nail seat after penetrating subcutaneous tissues under the premise of ensuring that the opening area of a patient is not increased; secondly, the extension piece of the utility model is a rigid extension piece, which replaces the technical proposal of the flexible extension piece made of plastic in the prior art, the utility model can not generate harm to the human body in the specific operation process, when the extension piece needs to be lifted, the rigid extension piece can not generate distortion and deformation, the rigidity strength can not be lost, and the effects of correcting and resetting the spine of the patient can be ensured;
because extension piece coupling mechanism includes connective bar and jackscrew, the jackscrew is established in the nail seat, and the jackscrew simultaneously with extension piece and nail seat threaded connection, the connective bar radially passes the nail seat, and the connective bar is located the jackscrew below and offsets rather than, consequently, the utility model discloses directly get into between two extension pieces through taking out the instrument, make extension piece and nail seat separation, the utility model discloses can be under the nail seat prerequisite not destroyed, take off the extension piece fast, overcome among the prior art through the nail seat extension section of rupture, lead to nail seat can produce defects such as broken surface or sharp blade, shortened the recovery cycle at patient's wound position.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
3 FIG. 32 3 is 3 a 3 schematic 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 31 3; 3
FIG. 3 is an enlarged schematic view of section B of FIG. 1;
FIG. 4 is a schematic view of the extension of FIG. 1;
FIG. 5 is a schematic perspective view of the staple holder of FIG. 1;
FIG. 6 is a schematic perspective view of the ball stud reversing and positioning mechanism of the present invention;
FIG. 7 is an exploded perspective view of FIG. 6;
fig. 8 is a schematic perspective view of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, but is not limited thereto.
As shown in fig. 1, 2, 3, 4, 5, 6, 7 and 8, a pedicle screw comprises an extension plate 1, a screw seat 2, an extension plate connecting mechanism 3 and a ball stud 4, wherein the screw seat 2 is assembled and connected with the ball stud 4,
a. the two extension pieces 1 are rigid extension pieces, the two extension pieces 1 are oppositely arranged on two sides of the nail seat 2, and the two extension pieces 1 are detachably connected with the nail seat 2 through extension piece connecting mechanisms 3;
b. extension piece coupling mechanism 3 includes connective bar 31 and jackscrew 32, jackscrew 32 is established in nail seat 2, and jackscrew 32 simultaneously with extension piece 1 and 2 threaded connection of nail seat, connective bar 31 radially passes nail seat 2, and connective bar 31 is located the jackscrew 32 below and offsets rather than.
As shown in fig. 1, 3 and 4, in order to facilitate quick positioning assembly and separation of the extension piece and the nail seat, an elastic piece 5 arranged along the axial direction of the extension piece 1 is arranged at one end of the extension piece 1, a positioning protrusion 51 is arranged on the inner wall of the elastic piece 5, a positioning pit 21 is arranged on the outer wall of the nail seat 2, and the positioning protrusion 51 of the elastic piece 5 is arranged in the positioning pit 21 of the nail seat 2. The utility model discloses an elastic piece 5 is formed by the direct line cutting processing on the extension piece. When the extension piece is taken off to needs, the utility model discloses direct get into between two extension pieces through taking out the instrument, support the location arch 51, make the protruding 51 locating of extension 1 break away from in the locating hole pit of nail seat 2, like this, the utility model discloses can be under the nail seat prerequisite of not destroying, take off the extension piece fast, neither need break the nail seat, can not make the nail seat produce defects such as broken face or blade yet, shortened the recovery cycle at patient's wound position.
As shown in fig. 3, 4 and 5, in order to quickly position and connect the extension piece and the nail seat, an axial guide rail 11 is arranged at the end of one end of the extension piece 1, a guide rail groove 22 is arranged on the side wall of the nail seat 2, and the axial guide rail 11 of the extension piece 1 is in sliding fit with the guide rail groove 22 of the nail seat 2. During assembly, the axial guide rail 11 of the extension piece 1 slides along the guide rail groove 22 and the positioning projection 51 slides into the positioning recess of the nail seat.
As shown in fig. 3 and 5, in order to facilitate the guiding of the extension piece, a guiding inclined surface 23 is provided at the end of the nail seat 2 and near the guiding groove 22, and the axial guiding rail 11 of the extension piece 1 is in sliding fit with the guiding groove 22 of the nail seat 2 through the guiding inclined surface 23.
In order to make the utility model discloses the structure is more reasonable, the location arch 51 of flexure strip 5 is circular arch, or square bulge, or triangle-shaped arch. Of course, the shape is not limited to this, and other shapes of the protrusion may be used, and the shape of the elastic piece 5 matches with the shape of the positioning recess of the nail seat 2.
As shown in fig. 3, 6, and 7, in order to facilitate unidirectional fixation and universal adjustment of the ball stud, a ball stud reversing positioning mechanism 6 is arranged in the stud base 2, the ball stud reversing positioning mechanism 6 includes a positioning stud base 61, a positioning connecting piece 62, and a retaining gasket 63, the positioning connecting piece 62 is located between the positioning stud base 61 and the retaining gasket 63, the positioning stud base 61 is in threaded connection with the positioning connecting piece 62, the ball stud 4 is provided with a ball head portion 41 integrated with the ball stud 4, and the ball head portion 41 of the ball stud 4 is in threaded connection with an inner spherical surface of the positioning stud base 61.
As shown in fig. 7, for assembly, a plurality of separately arranged positioning bosses 611 are provided on an end surface of the positioning clamping seat 61, the retaining pad 63 is provided with a positioning bayonet 631, the retaining pad 63 is clamped on the positioning connecting piece 62, and the positioning bosses 611 of the positioning clamping seat 61 are clamped in the positioning bayonets 631 of the retaining pad 63. The retaining pad 63 is provided with an opening to make the retaining pad 63 have certain expansion and contraction properties, so as to facilitate assembly.
The specific adjusting process of the ball stud 4 is as follows: firstly, the ball head part 41 of the ball stud 4 is in threaded connection with the inner spherical surface of the positioning clamping seat 61, then the positioning connecting piece 62 is screwed into the positioning clamping seat 61, and then the positioning bayonet 631 of the retaining gasket 63 is pressed on the end surface of the positioning connecting piece 62 and is assembled with the positioning boss 611 of the positioning clamping seat 61; if the ball stud 4 is in a unidirectional fixed mode, the positioning connecting piece 62 is rotated by a tool to move downwards, the inner spherical surface of the positioning connecting piece 62 abuts against the end surface of the ball head part 41 of the ball stud 4, the anti-backing gasket 63 has an anti-backing and anti-rotation function in the process, the positioning connecting piece 62 is continuously pressurized and rotated, so that the positioning clamping seat 61 continuously generates a reaction force on the positioning clamping seat 61 until the positioning clamping seat 61 completely presses the ball head part 41 of the ball stud 4, and a fixed single-shaft state is achieved;
when the ball stud 4 needs to be converted into a universal mode, the positioning connecting piece 62 is rotated reversely by a tool to move upwards, the positioning connecting piece 62 is separated from the ball head part 41 of the ball stud 4 and abuts against the retaining gasket 63, and the ball stud 4 can rotate around the inner spherical surface of the positioning connecting piece 62 at any angle.
The extension piece 1 is arc sheet, and the extension piece 1 is titanium alloy rigid extension piece, or stainless steel rigid extension piece.
The utility model discloses the advantage of structure is:
firstly, the rigid extension pieces of the utility model are provided with a left piece and a right piece which are respectively inserted at two sides of the nail seat and are of an open structure, when a rod (connecting rod) is penetrated, the connecting rod is only required to be directly inserted between the two extension pieces under the premise of ensuring that the opening area of a patient is not increased, and the connecting rod penetrates subcutaneous tissues and directly enters the U-shaped nail seat;
secondly, the extension piece of the utility model is a rigid extension piece, which replaces the technical proposal of the flexible extension piece made of plastic in the prior art, the utility model can not generate harm to the human body in the specific operation process, when the extension piece needs to be lifted, the rigid extension piece can not generate distortion and deformation, the rigidity strength can not be lost, and the effects of correcting and resetting the spine of the patient can be ensured;
third, the utility model discloses directly get into between two extension pieces through taking out the instrument, make extension piece and nail seat separation, the utility model discloses can take off the extension piece fast under the nail seat prerequisite of not destroying, overcome among the prior art through the nail seat extension section of rupture, lead to nail seat can produce defects such as broken face or sharp blade, shortened the recovery cycle at patient's wound position.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The utility model provides a pedicle screw, includes extension piece (1), nail seat (2), extension piece coupling mechanism (3) and bulb nail (4), nail seat (2) and bulb nail (4) be assembled between/be connected between, its characterized in that:
a. the nail seat is characterized in that the number of the extension pieces (1) is two, the extension pieces (1) are rigid extension pieces, the two extension pieces (1) are oppositely arranged on two sides of the nail seat (2), and the two extension pieces (1) are detachably connected with the nail seat (2) through extension piece connecting mechanisms (3);
b. extension piece coupling mechanism (3) include connective bar (31) and jackscrew (32), jackscrew (32) are established in nail seat (2), and jackscrew (32) simultaneously with extension piece (1) and nail seat (2) threaded connection, connective bar (31) radially pass nail seat (2), and connective bar (31) are located jackscrew (32) below and offset with it.
2. The pedicle screw according to claim 1, wherein: the one end of extension piece (1) is equipped with along its axial arrangement's flexure strip (5), be equipped with location arch (51) on the inner wall of flexure strip (5), be equipped with location pit (21) on the outer wall of nail seat (2), the location arch (51) of flexure strip (5) are established in location pit (21) of nail seat (2).
3. The pedicle screw according to claim 1, wherein: the end part of one end of the extension piece (1) is provided with an axial guide rail (11), the side wall of the nail seat (2) is provided with a guide rail groove (22), and the axial guide rail (11) of the extension piece (1) is in sliding fit with the guide rail groove (22) of the nail seat (2).
4. A pedicle screw as claimed in claim 3, wherein: the end part of the nail seat (2) and the part close to the guide rail groove (22) are provided with a guide inclined plane (23), and the axial guide rail (11) of the extension piece (1) is in sliding fit with the guide rail groove (22) of the nail seat (2) through the guide inclined plane (23).
5. A pedicle screw as claimed in claim 2, wherein: the positioning bulge (51) of the elastic sheet (5) is a circular bulge, a square bulge or a triangular bulge.
6. The pedicle screw according to claim 1, wherein: the ball stud reversing positioning mechanism is characterized in that a ball stud reversing positioning mechanism (6) is arranged in the stud seat (2), the ball stud reversing positioning mechanism (6) comprises a positioning clamping seat (61), a positioning connecting piece (62) and a stopping gasket (63), the positioning connecting piece (62) is located between the positioning clamping seat (61) and the stopping gasket (63), the positioning clamping seat (61) is in threaded connection with the positioning connecting piece (62), the ball stud (4) is provided with a ball head portion (41) which is integrated with the ball stud (4), and the ball head portion (41) of the ball stud (4) is in threaded connection with an inner spherical surface of the positioning clamping seat (61).
7. A pedicle screw as claimed in claim 6, wherein: the end face of the positioning clamping seat (61) is provided with a plurality of positioning bosses (611) which are separately arranged, the retaining gasket (63) is provided with a positioning bayonet (631), the retaining gasket (63) is clamped on the positioning connecting sheet (62), and the positioning bosses (611) of the positioning clamping seat (61) are clamped in the positioning bayonet (631) of the retaining gasket (63).
8. The pedicle screw according to claim 1, wherein: the extension piece (1) is arc-shaped and flaky, and the extension piece (1) is a titanium alloy rigid extension piece or a stainless steel rigid extension piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920695662.3U CN210541781U (en) | 2019-05-15 | 2019-05-15 | Pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920695662.3U CN210541781U (en) | 2019-05-15 | 2019-05-15 | Pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210541781U true CN210541781U (en) | 2020-05-19 |
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ID=70666136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920695662.3U Active CN210541781U (en) | 2019-05-15 | 2019-05-15 | Pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210541781U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111467026A (en) * | 2020-05-25 | 2020-07-31 | 迪恩医疗科技有限公司 | Special tool for removing pedicle screw extension sheet |
-
2019
- 2019-05-15 CN CN201920695662.3U patent/CN210541781U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111467026A (en) * | 2020-05-25 | 2020-07-31 | 迪恩医疗科技有限公司 | Special tool for removing pedicle screw extension sheet |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 213000 No. 10 Jinsha River Road, Xinbei District, Jiangsu, Changzhou Patentee after: DEAN MEDICAL TECHNOLOGY Co.,Ltd. Address before: 213000 No.10 Jinshajiang Road, North District, Changzhou City, Jiangsu Province Patentee before: DEAN MEDICAL TECHNOLOGY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |