CN213697144U - Universal fixed pedicle screw assembly - Google Patents
Universal fixed pedicle screw assembly Download PDFInfo
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- CN213697144U CN213697144U CN202022317449.4U CN202022317449U CN213697144U CN 213697144 U CN213697144 U CN 213697144U CN 202022317449 U CN202022317449 U CN 202022317449U CN 213697144 U CN213697144 U CN 213697144U
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Abstract
The utility model provides an universal fixed pedicle screw subassembly, include: the nail seat, the screw piece and the compression ring; the screw member comprises a screw rod and a screw head; the top of the nail seat is provided with an installation groove; the nail seat comprises a seat body and a nail arm, and a through hole channel is formed in the bottom of the seat body; the upper hole passage part of the through hole passage is a ball socket structure for supporting the lower part of the screw head; the size of the upper end of the upper hole channel part is smaller than that of the inner side surface of the mounting groove; the inner side surface of the lower duct part is provided with a cylinder accommodating groove; the lower part of the inner side surface of the compression ring is provided with a positioning concave part, the positioning concave part is of an inner conical structure with the size sequentially increased from top to bottom, and the compression ring is clamped between the nail seat and the upper part of the head of the screw. This universal fixed pedicle of vertebral arch screw subassembly when operation in-process uses, can become fixed angle by universal angle gradually to drive the centrum and reset, and form firm internal fixation structure at the postoperative.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to an universal fixed pedicle of vertebral arch screw subassembly.
Background
The pedicle screw is a commonly used internal fixing device for spinal surgery, generally comprises a universal pedicle screw and an angle-fixed pedicle screw, is fixed on the pedicle of a vertebral arch, and is matched with other internal implants such as a rod, a plug screw and the like to complete the internal fixation of the spinal column.
The spinal internal fixation generally requires the postoperative internal implant and the vertebral body to form strong internal fixation, the universal pedicle screw has lower load resistance than the fixed angle pedicle screw due to the structural characteristics, and the structural looseness is one of failure modes; fixed angle pedicle of vertebral arch screw anti-load capacity is stronger, accords with the requirement that the spinal surgery formed strong internal fixation, but fixed angle pedicle of vertebral arch screw nail seat can not move about like universal pedicle of vertebral arch screw in the art, causes the dress stick difficulty easily, and in a word, to the spinal internal fixation art, universal pedicle of vertebral arch screw postoperative has not hard up risk, and fixed angle pedicle of vertebral arch screw causes the dress stick difficulty easily in the art.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings of the prior art, the technical problem solved by the present invention is to provide an universal fixation pedicle screw assembly.
To achieve the above objects and other related objects, the present invention provides an universal fixation pedicle screw assembly, including: the nail seat, the screw piece and the compression ring;
the screw part comprises a screw rod and a screw head arranged at the upper end of the screw rod, an external thread part is arranged on the screw rod, the upper part of the screw head is of a conical structure with the size gradually reduced and increased from top to bottom, and the lower surface of the screw head is a spherical surface;
the top of the nail seat is provided with an installation groove, the installation groove is sunken downwards from the top of the nail seat and penetrates through the nail seat along the radial direction, and the inner side surface of the installation groove is provided with a locking thread part;
the nail seat comprises a seat body and a nail arm arranged at the upper end of the seat body, and the nail arm comprises two oppositely arranged arm parts which are respectively positioned at two sides of the mounting groove; each arm portion is arc-shaped; the seat body is cylindrical; a vertical plane passing through the central axis of the seat body and having equal distances from the two arm parts is a middle plane; the two arm parts are symmetrically arranged by taking the middle plane as a middle axial plane; the mounting groove extends to the interior of the seat body;
the bottom of the seat body is provided with a through hole channel; the through hole channel comprises an upper hole channel part and a lower hole channel part which are sequentially connected from top to bottom, and the upper hole channel part is a ball socket structure for supporting the lower part of the screw head; the size of the upper end of the upper hole channel part is smaller than that of the inner side surface of the mounting groove; the inner side surface of the lower hole passage part is provided with column body accommodating grooves, the groove bottom surface of each column body accommodating groove is obliquely arranged relative to the central axis of the seat body, and the distance between the groove bottom surface of each column body accommodating groove and the central axis of the seat body is sequentially increased from top to bottom;
the lower part of the inner side face of the compression ring is provided with a positioning concave part, the positioning concave part is of an inner conical structure with the size gradually increased from top to bottom, the positioning concave part corresponds to the upper part of the head of the screw, and the compression ring is used for being clamped between the screw seat and the upper part of the head of the screw.
Preferably, a side hole is arranged on the outer side surface of each arm, and the two side holes are symmetrically arranged by taking the middle plane as a middle axial plane; the side hole is positioned below the locking thread part; two limiting grooves which are oppositely arranged are formed in the outer side surface of the compression ring; when the lower end of the compression ring is inserted into the seat body, the hole wall of the side hole is punched to form a collision bag inserted into the limit groove.
Preferably, the number of the cylinder accommodating grooves is two, and the two cylinder accommodating grooves are symmetrically arranged by taking the middle plane as a middle axial plane.
Preferably, each of the cylinder receiving grooves has an arc-shaped structure.
Preferably, the diameter of the upper end of the upper hole part is smaller than the diameter of the inner side surface of the mounting groove.
Preferably, the upper end face of the screw head has a driving groove.
Preferably, the inner part of the through hole is provided with a hole internal thread.
Preferably, the nail seat and the screw piece are both made of titanium alloy materials.
As above, the utility model discloses an universal fixed pedicle of vertebral arch screw subassembly has following beneficial effect:
the utility model discloses an universal fixed pedicle of vertebral arch screw subassembly can become fixed angle by universal angle gradually when operation in-process uses to drive the centrum and reset, and form strong internal fixation structure at the postoperative.
Drawings
FIG. 1 is a schematic view showing the universal structure formed between the screw holder and the screw member of the universal pedicle screw assembly according to the embodiment.
FIG. 2 is a schematic view showing a fixed connection structure formed between the screw holder and the screw member of the universal pedicle screw assembly according to the embodiment.
FIG. 3 is a cross-sectional view of the universal pedicle screw assembly shown in this embodiment, illustrating the structure of the screw seat without a collision bag.
FIG. 4 is a perspective view of the universal pedicle screw assembly with a collision bag on the screw seat.
FIG. 5 is a cross-sectional view of the universal pedicle screw assembly with a collision bag in the screw receptacle.
FIG. 6 is a schematic view of the compression ring of the universal pedicle screw assembly according to the embodiment.
FIG. 7 is a schematic view showing the structure of the screw member of the universal pedicle screw assembly according to the embodiment.
Fig. 8 is a schematic structural view showing a second vertebral body protruding rotationally out of three first, second and third vertebral bodies arranged adjacently in sequence according to the present embodiment.
Fig. 9 is a structural diagram illustrating the second vertebral body, which is rotated and protruded out of the first vertebral body, the second vertebral body and the third vertebral body, which are adjacently arranged in sequence, of the embodiment, being restored to a normal state.
Description of the reference numerals
100 screw member
110 screw rod
Head of 120 screw
121 upper part of screw head
122 lower surface of screw head
123 drive slot
200 nail seat
201 seat body
202 arm part
210 mounting groove
211 locking screw part
220 through hole
221 upper hole channel part
222 lower tunnel part
223 tunnel internal thread
230 column holding groove
240 side hole
241 conflict packet
300 clamp ring
310 positioning recess
320 spacing groove
10 first vertebral body
20 second vertebral body
30 third vertebral body
40 fixed angle pedicle screw
50 connecting rod
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to the attached drawings. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", "distal", "proximal" and "a" used in the present specification are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and thus the present invention is considered to be within the scope of the present invention.
As shown in fig. 1 to 9, the universal fixation pedicle screw assembly of the present embodiment includes: the screw member 100, the nail seat 200 and the compression ring 300;
the screw member 100 comprises a screw rod 110 and a screw head 120 arranged at the upper end of the screw rod 110, wherein an external thread part is arranged on the screw rod 110, the upper part 121 of the screw head 120 is a conical structure with the size gradually decreasing and increasing from top to bottom, and the lower surface 122 of the screw head 120 is a spherical surface;
the top of the nail seat 200 is provided with a mounting groove 210, the mounting groove 210 is recessed downwards from the top of the nail seat 200 and radially penetrates through the nail seat 200, and the inner side surface of the mounting groove 210 is provided with a locking thread part 211;
the nail seat 200 comprises a seat body 201 and a nail arm arranged at the upper end of the seat body 201, wherein the nail arm comprises two oppositely arranged arm parts 202 which are respectively positioned at two sides of the mounting groove 210; each arm 202 is arc-shaped; the seat body 201 is cylindrical; a vertical plane passing through the central axis of the seat body 201 and having the same distance with the two arm portions 202 is a middle plane; the two arm portions 202 are symmetrically arranged with the middle plane as a middle axial plane; the mounting groove 210 extends to the inside of the seat body 201;
the bottom of the seat body 201 is provided with a through hole passage 220; the through hole 220 includes an upper hole portion 221 and a lower hole portion 222 which are sequentially connected from top to bottom, and the upper hole portion 221 is a ball-and-socket structure for supporting the lower portion of the screw head 120; the size of the upper end of the upper hole part 221 is smaller than the size of the inner side surface of the mounting groove 210; the inner side surface of the lower duct portion 222 is provided with column accommodating grooves 230, the bottom surface of each column accommodating groove 230 is inclined relative to the central axis of the seat body 201, and the distance between the bottom surface of each column accommodating groove 230 and the central axis of the seat body 201 increases from top to bottom;
the lower portion of the inner side surface of the clamp ring 300 is provided with a positioning recess 310, the positioning recess 310 is an inner conical structure with the size increasing from top to bottom, the positioning recess 310 corresponds to the upper portion 121 of the screw head 120, and the clamp ring 300 is used for being clamped between the screw seat 200 and the upper portion 121 of the screw head 120.
In the universal fixed pedicle screw assembly of the present invention, the top of the screw seat 200 is provided with a mounting groove 210, the bottom of the seat body 201 is provided with a through hole 220, the size of the upper end of the upper hole 221 of the through hole 220 is smaller than the size of the inner side of the mounting groove 210, the inner side of the lower hole 222 is provided with a column body accommodating groove 230, the column body accommodating groove 230 is a structure with the size increasing from top to bottom, when the screw head 120 is in the mounting groove 210, a universal structure is formed between the screw seat 200 and the screw member 100, i.e. universal rotation can be realized and the screw head 120 cannot be separated from the screw seat 200 from the lower hole 222 downwards; the ball and socket structure supports the screw head 120 when the ball and socket structure is held against the lower surface 122 of the screw head 120, with the central axis of the screw shaft 110 being collinear with the central axis of the nail seat 200, and the clamp ring 300 is configured to be clamped between the nail seat 200 and the upper portion 121 of the screw head 120, thereby forming a fixed connection between the nail seat 200 and the screw member 100.
The screw shaft 110 can rotate and swing and cannot be pulled out from the lower end of the nail seat 200 through the cooperation of the lower surface 122 of the screw head 120 and the ball and socket structure; the column receiving groove 230 is provided to allow the screw shaft 110 and the nail holder 200 to swing relatively at a large angle, thereby facilitating the installation of the connecting rod 50 in the operation.
In a first vertebral body 10, a second vertebral body 20 and a third vertebral body 30 which are sequentially and adjacently arranged, the second vertebral body 20 is protruded in a rotating mode, pedicle screws 40 with fixed angles are respectively driven into the first vertebral body 10 and the third vertebral body 30, a connecting rod 50 and the two pedicle screws 40 with fixed angles are fixed to form a fixed beam structure, a universal fixed pedicle screw assembly is installed on the second vertebral body 20, a force for lifting the nail seat 200 by taking the connecting rod 50 as a fulcrum is applied to a screw member 100 of the second vertebral body 20 or the connecting rod 50 is pressed by a screw plug, the connecting rod 50 applies pressure to the screw member 100 through a compression ring 300 to lift the nail seat 200 upwards, the connecting rod 50 is fixed at the moment, and the screw plug is screwed downwards by force to lift the nail seat 200 upwards; according to the accurate centering effect of the conical fit and the high coaxiality of the conical fit, the central axis of the nail seat 200 and the central axis of the screw member 100 are overlapped step by step, and meanwhile, the screw member 100 drives the second centrum 20 which is protruded in a rotating mode to reset step by step to a normal state; finally add the pressure that the plug screw locked the connective bar 50 and produced, this moment the utility model discloses a nail seat 200 and the structure that forms fixed connection between the screw member 100 can bear great load.
A side hole 240 is arranged on the outer side surface of each arm part 202, and the two side holes 240 are symmetrically arranged by taking the middle plane as a middle axial plane; the side hole 240 is below the locking screw portion 211; two oppositely arranged limiting grooves 320 are formed in the outer side face of the compression ring 300; when the lower end of the clamp ring 300 is inserted into the seat body 201, the hole wall of the side hole 240 is punched to form a collision packet 241 inserted into the limiting groove 320. The interference pack 241 limits the compression ring 300 to slide up and down in the mounting groove 210, and keeps the positioning recess 310 from separating from the upper portion 121 of the screw head 120, thereby preventing the screw member 100 from falling out.
The number of the column accommodating grooves 230 is two, and the two column accommodating grooves 230 are symmetrically arranged by taking the middle plane as a middle axial plane. This arrangement enables a relatively large angular relative swinging movement of the screw shaft 110 and the nail holder 200.
Each of the cylinder receiving slots 230 has an arcuate configuration that facilitates movement of the screw shaft 110 within the cylinder receiving slot 230.
For convenience of processing, the inner side surface of the mounting groove 210 is arc-shaped, and the diameter of the upper end of the upper hole part 221 is smaller than that of the inner side surface of the mounting groove 210.
The upper end of the screw head 120 has a driving groove 123. This configuration facilitates installation of the screw member 100.
The through hole 220 is internally provided with a hole internal thread 223, and the arrangement of the hole internal thread 223 can facilitate the installation of the screw rod 110.
The nail seat 200 and the screw member 100 are made of titanium alloy material. This structure is convenient for the equipment of the universal fixed pedicle screw assembly of this embodiment.
The utility model discloses an universal fixed pedicle of vertebral arch screw subassembly when operation in-process uses, can become fixed angle by universal angle gradually, can make things convenient for in the art promptly to adorn the stick, operation such as reset to drive the centrum and reset, and form strong internal fixation structure at the postoperative. Utilize the accurate centering action of circular cone and the higher characteristic of circular cone complex axiality among this universal fixed pedicle of vertebral arch screw subassembly, become set screw with universal screw, the convenience of the operation of reinforcing has improved the security of product.
To sum up, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A universal fixation pedicle screw assembly, comprising: the screw component (100), the screw seat (200) and the compression ring (300);
the screw component (100) comprises a screw rod (110) and a screw head (120) arranged at the upper end of the screw rod (110), an external thread part is arranged on the screw rod (110), the upper part (121) of the screw head (120) is a conical structure of which the size is gradually reduced and increased from top to bottom, and the lower surface (122) of the screw head (120) is a spherical surface;
the top of the nail seat (200) is provided with a mounting groove (210), the mounting groove (210) is recessed downwards from the top of the nail seat (200) and penetrates through the nail seat (200) along the radial direction, and the inner side surface of the mounting groove (210) is provided with a locking thread part (211);
the nail seat (200) comprises a seat body (201) and a nail arm arranged at the upper end of the seat body (201), and the nail arm comprises two oppositely arranged arm parts (202) which are respectively positioned at two sides of the mounting groove (210); each arm (202) is arc-shaped; the seat body (201) is cylindrical; a vertical plane passing through the central axis of the seat body (201) and having the same distance with the two arm parts (202) is a middle plane; the two arm parts (202) are symmetrically arranged by taking the middle plane as a middle axial plane; the mounting groove (210) extends to the inside of the seat body (201);
the bottom of the seat body (201) is provided with a through hole (220); the through hole (220) comprises an upper hole part (221) and a lower hole part (222) which are sequentially connected from top to bottom, and the upper hole part (221) is a ball-and-socket structure for supporting the lower part of the screw head (120); the size of the upper end of the upper hole part (221) is smaller than that of the inner side surface of the mounting groove (210); the inner side surface of the lower hole passage part (222) is provided with column body accommodating grooves (230), the groove bottom surface of each column body accommodating groove (230) is obliquely arranged relative to the central axis of the seat body (201), and the distance between the groove bottom surface of each column body accommodating groove (230) and the central axis of the seat body (201) is sequentially increased from top to bottom;
the lower part of the inner side face of the compression ring (300) is provided with a positioning concave part (310), the positioning concave part (310) is of an inner conical structure with the size increasing from top to bottom, the positioning concave part (310) corresponds to the upper part (121) of the screw head (120), and the compression ring (300) is used for being clamped between the screw seat (200) and the upper part (121) of the screw head (120).
2. The universal fixation pedicle screw assembly according to claim 1, wherein: a side hole (240) is arranged on the outer side surface of each arm part (202), and the two side holes (240) are symmetrically arranged by taking the middle plane as a middle axial plane;
the side hole (240) is positioned below the locking thread part (211);
two limiting grooves (320) which are oppositely arranged are formed in the outer side surface of the compression ring (300); when the lower end of the compression ring (300) is inserted into the seat body (201), the hole wall of the side hole (240) is punched to form a collision bag (241) inserted into the limiting groove (320).
3. The universal fixation pedicle screw assembly according to claim 1, wherein: the number of the column body accommodating grooves (230) is two, and the two column body accommodating grooves (230) are symmetrically arranged by taking the middle plane as a middle axis plane.
4. The universal fixation pedicle screw assembly according to claim 1 or 3, wherein: each cylinder accommodating groove (230) is of an arc-shaped structure.
5. The universal fixation pedicle screw assembly according to claim 1, wherein: the diameter of the upper end of the upper hole part (221) is smaller than that of the inner side surface of the mounting groove (210).
6. The universal fixation pedicle screw assembly according to claim 1, wherein: the upper end face of the screw head (120) is provided with a driving groove (123).
7. The universal fixation pedicle screw assembly according to claim 1, wherein: the inner part of the through hole (220) is provided with a hole internal thread (223).
8. The universal fixation pedicle screw assembly according to claim 1, wherein: the nail seat (200) and the screw piece (100) are made of titanium alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022317449.4U CN213697144U (en) | 2020-10-16 | 2020-10-16 | Universal fixed pedicle screw assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022317449.4U CN213697144U (en) | 2020-10-16 | 2020-10-16 | Universal fixed pedicle screw assembly |
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| Publication Number | Publication Date |
|---|---|
| CN213697144U true CN213697144U (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022317449.4U Active CN213697144U (en) | 2020-10-16 | 2020-10-16 | Universal fixed pedicle screw assembly |
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| CN (1) | CN213697144U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113813033A (en) * | 2021-09-24 | 2021-12-21 | 浙江省立同德医院 | Angle-adjustable self-locking type lumbosacral anterior channel vertebral arch fixing nail plate fixing method and system |
-
2020
- 2020-10-16 CN CN202022317449.4U patent/CN213697144U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113813033A (en) * | 2021-09-24 | 2021-12-21 | 浙江省立同德医院 | Angle-adjustable self-locking type lumbosacral anterior channel vertebral arch fixing nail plate fixing method and system |
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