CN213697145U - Universal fixed vertebral pedicle screw structure - Google Patents
Universal fixed vertebral pedicle screw structure Download PDFInfo
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- CN213697145U CN213697145U CN202022320645.7U CN202022320645U CN213697145U CN 213697145 U CN213697145 U CN 213697145U CN 202022320645 U CN202022320645 U CN 202022320645U CN 213697145 U CN213697145 U CN 213697145U
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- screw
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Abstract
The utility model provides an universal fixed pedicle of vertebral arch screw structure, include: a nail seat and a screw member; the top of the nail seat is provided with an installation groove; 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; a limiting accommodating groove is formed along the circumferential direction of the inner side surface of each arm part; 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 cone structure with the size which is sequentially reduced from top to bottom; the inner side surface of the lower duct part is provided with two oppositely arranged cylinder accommodating grooves; the screw part comprises a screw rod and a screw head, the screw head is a cone structure with the size sequentially reduced from top to bottom, and the screw head is clamped in by the upper hole channel part. This universal fixed pedicle of vertebral arch screw structure 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 structure.
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-mentioned shortcomings of the prior art, the technical problem solved by the present invention is to provide an universal fixation pedicle screw structure.
In order to achieve the above objects and other related objects, the present invention provides an universal fixation pedicle screw structure, including: a nail seat and a screw member;
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;
a limiting accommodating groove is formed along the circumferential direction of the inner side surface of each arm part; the limiting accommodating groove is positioned below the locking thread part; the bottom of the seat body is provided with a through hole channel, the through hole channel is communicated with the mounting groove and is positioned below the mounting groove, the through hole channel comprises an upper hole channel part and a lower hole channel part which are sequentially connected from top to bottom, the upper hole channel part is of a cone structure with sequentially reduced size from top to bottom, and the distance between the inner side surfaces of the two limiting accommodating grooves is larger than the diameter of the upper end of the upper hole channel part; the inner side surface of the lower duct part is provided with two oppositely arranged cylinder accommodating grooves which are symmetrically arranged by taking the middle plane as a middle axial plane; the bottom surface of each column containing groove is obliquely arranged relative to the central axis of the seat body, and the distance between the bottom surface of each column containing groove and the central axis of the seat body is sequentially increased from top to bottom;
the screw part include the screw pole with set up in the screwhead portion of screw pole upper end, be equipped with external screw thread portion on the screw pole, screwhead portion is the cone structure that the size from top to bottom reduces in proper order, it supplies to go up pore portion screwhead portion card is gone into.
Preferably, a convex part is arranged on the inner side surface of each arm part, the inner side surface of each convex part is arc-shaped, and the radius of the inner side surface of each convex part is smaller than that of the upper end surface of the screw head; each bulge is located between the locking thread part and the limiting and accommodating groove.
Preferably, each of the cylinder receiving grooves has an arc-shaped structure.
Preferably, the upper end face of the screw head has a driving groove.
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 structure has following beneficial effect:
the utility model discloses an universal fixed pedicle of vertebral arch screw structure 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 fixation structure 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 fixation structure according to the embodiment.
Fig. 3 is a schematic view of fig. 2 taken along line a-a.
Fig. 4 is a schematic structural view showing the upper portion of the nail holder of the universal pedicle screw fixation structure according to the embodiment.
Fig. 5 is a schematic structural view showing the lower part of the nail holder of the universal fixation pedicle screw structure of the embodiment.
Fig. 6 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. 7 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 nail seat
101 seat body
102 arm part
110 mounting groove
120 locking screw thread part
130 limit accommodating groove
140 through bore
141 upper hole part
142 lower hole part
150 column holding tank
160 raised part
Inner side surface of 161 convex part
200 screw member
210 screw rod
220 screw head
221 drive slot
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 7, the universal fixation pedicle screw structure of the present embodiment includes: the nail seat 100 and the screw member 200;
the top of the nail seat 100 is provided with a mounting groove 110, the mounting groove 110 is recessed downwards from the top of the nail seat 100 and radially penetrates through the nail seat 100, and the inner side surface of the mounting groove 110 is provided with a locking thread part 120;
the nail seat 100 comprises a seat body 101 and a nail arm arranged at the upper end of the seat body 101, wherein the nail arm comprises two oppositely arranged arm parts 102 which are respectively positioned at two sides of the mounting groove 110; each arm 102 is arc-shaped; the seat body 101 is cylindrical; a vertical plane passing through the central axis of the seat body 101 and having the same distance from the two arm portions 102 is a middle plane; the two arm parts 102 are symmetrically arranged by taking the middle plane as a middle axial plane;
a limit accommodating groove 130 is formed along the circumferential direction of the inner side surface of each arm portion 102; the limiting and accommodating groove 130 is positioned below the locking thread part 120; the bottom of the seat body 101 is provided with a through hole channel 140, the through hole channel 140 is communicated with the mounting groove 110, the through hole channel 140 is positioned below the mounting groove 110, the through hole channel 140 comprises an upper hole channel part 141 and a lower hole channel part 142 which are sequentially connected from top to bottom, the upper hole channel part 141 is a conical structure with the size sequentially reduced from top to bottom, and the distance between the inner side surfaces of the two limiting accommodating grooves 130 is larger than the diameter of the upper end of the upper hole channel part 141; the inner side surface of the lower tunnel part 142 is provided with two oppositely arranged cylinder accommodating grooves 150, and the two cylinder accommodating grooves 150 are symmetrically arranged by taking the middle plane as a middle axial plane; the bottom surface of each column accommodating groove 150 is obliquely arranged relative to the central axis of the seat body 101, and the distance between the bottom surface of each column accommodating groove 150 and the central axis of the seat body 101 is sequentially increased from top to bottom;
the screw member 200 includes a screw shaft 210 and a screw head 220 disposed at an upper end of the screw shaft 210, wherein the screw shaft 210 is provided with an external screw thread portion, the screw head 220 is a conical structure whose size decreases from top to bottom, and the screw head 220 is inserted into the upper hole portion 141.
The utility model discloses a set up spacing holding tank 130 and cylinder holding tank 150 on the nail seat 100 of universal fixed pedicle of vertebral arch screw structure, then the screw head 220 is in spacing holding tank 130, form the universal structure between nail seat 100 and the screw member 200, can realize the universal rotation, when the screw pole 210 is in the cylinder holding tank 150, form the universal structure that the relative swing angle is bigger between nail seat 100 and the screw member 200; when the screw head 220 is engaged in the upper hole 141, the connecting rod 50 will be pressed against the upper end of the screw member 200, and a fixed connection is formed between the nail seat 100 and the screw member 200.
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, fixed-angle pedicle screws 40 are respectively driven into the first vertebral body 10 and the third vertebral body 30, a connecting rod 50 and the two fixed-angle pedicle screws 40 are fixed to form a fixed beam structure, a universal fixed pedicle screw structure is installed on the second vertebral body 20, a force for lifting the nail seat 100 by taking the connecting rod 50 as a fulcrum is applied to a screw member 200 of the second vertebral body 20 or a screw plug is used for pressing the connecting rod 50 to lift the nail seat 100 upwards, at the moment, the connecting rod 50 is fixed, and the screw plug is rotated downwards by force to lift the nail seat 100; according to the accurate centering effect of the conical matching and the high coaxiality of the conical matching, the central axis of the nail seat 100 and the central axis of the screw member 200 are gradually superposed, and meanwhile, the screw member 200 drives the second centrum 20 which is protruded in a rotating mode to gradually reset to a normal state; finally, the pressure generated by the locking of the connecting rod 50 by the screw plug is added, and the structure for fixing connection between the nail seat 100 and the screw member 200 of the present invention can bear a large load.
A convex part 160 is arranged on the inner side surface of each arm part 102, the inner side surface 161 of each convex part 160 is in a circular arc shape, and the radius of the inner side surface 161 of each convex part 160 is smaller than that of the upper end surface of the screw head part 220; each of the protrusions 160 is between the locking screw part 120 and the retaining-receiving groove 130. The two protrusions 160 prevent the screw head 220 in the position-limiting accommodation groove 130 from moving outward, and limit the screw head 220. Because the nail seat 100 and the screw member 200 are made of titanium alloy material, the screw head 220 can enter the limit accommodating groove 130 through the two protrusions 160.
Each of the cylinder receiving grooves 150 has an arc-shaped structure. This structure facilitates movement of the screw shaft 210 within the cylinder receiving slot 150.
The upper end of the screw head 220 has a driving groove 221. This configuration facilitates installation of the screw member 200.
The utility model discloses an universal fixed pedicle of vertebral arch screw structure when operation in-process uses, can become fixed angle gradually by universal angle, can conveniently adorn the stick promptly in the art, operation such as reset to drive the centrum and reset, and form strong internal fixation structure at the postoperative.
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 (5)
1. A universal fixation pedicle screw structure, comprising: a nail seat (100) and a screw member (200);
the top of the nail seat (100) is provided with a mounting groove (110), the mounting groove (110) is recessed downwards from the top of the nail seat (100) and penetrates through the nail seat (100) along the radial direction, and the inner side surface of the mounting groove (110) is provided with a locking thread part (120);
the nail seat (100) comprises a seat body (101) and a nail arm arranged at the upper end of the seat body (101), wherein the nail arm comprises two oppositely arranged arm parts (102) which are respectively positioned at two sides of the mounting groove (110); each arm (102) is arc-shaped; the seat body (101) is cylindrical; a vertical plane passing through the central axis of the seat body (101) and having the same distance with the two arm parts (102) is a middle plane; the two arm parts (102) are symmetrically arranged by taking the middle plane as a middle axial plane;
a limiting and accommodating groove (130) is formed along the circumferential direction of the inner side surface of each arm part (102); the limiting and accommodating groove (130) is positioned below the locking thread part (120); the bottom of the seat body (101) is provided with a through hole channel (140), the through hole channel (140) is communicated with the mounting groove (110), the through hole channel (140) is located below the mounting groove (110), the through hole channel (140) comprises an upper hole channel part (141) and a lower hole channel part (142) which are sequentially connected from top to bottom, the upper hole channel part (141) is a conical structure with sequentially reduced size from top to bottom, and the distance between the inner side surfaces of the two limiting accommodating grooves (130) is larger than the diameter of the upper end of the upper hole channel part (141); the inner side surface of the lower duct part (142) is provided with two oppositely arranged cylinder accommodating grooves (150), and the two cylinder accommodating grooves (150) are symmetrically arranged by taking the middle plane as a middle axial plane; the bottom surface of each column accommodating groove (150) is obliquely arranged relative to the central axis of the seat body (101), and the distance between the bottom surface of each column accommodating groove (150) and the central axis of the seat body (101) is sequentially increased from top to bottom;
screw member (200) including screw pole (210) with set up in screw head (220) of screw pole (210) upper end, be equipped with external screw thread portion on screw pole (210), screw head (220) are the size from top to bottom and reduce the cone structure in proper order, it supplies to go up pore portion (141) screw head (220) are gone into.
2. The universal fixation pedicle screw structure of claim 1, wherein: a convex part (160) is arranged on the inner side surface of each arm part (102), the inner side surface (161) of each convex part (160) is arc-shaped, and the radius of the inner side surface (161) of each convex part (160) is smaller than that of the upper end surface of the screw head part (220); each of the protrusions (160) is located between the locking screw part (120) and the stopper receiving groove (130).
3. The universal fixation pedicle screw structure of claim 1, wherein: each cylinder accommodating groove (150) is of an arc-shaped structure.
4. The universal fixation pedicle screw structure of claim 1, wherein: the upper end face of the screw head (220) is provided with a driving groove (221).
5. The universal fixation pedicle screw structure of claim 1, wherein: the nail seat (100) and the screw piece (200) are made of titanium alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022320645.7U CN213697145U (en) | 2020-10-16 | 2020-10-16 | Universal fixed vertebral pedicle screw structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022320645.7U CN213697145U (en) | 2020-10-16 | 2020-10-16 | Universal fixed vertebral pedicle screw structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213697145U true CN213697145U (en) | 2021-07-16 |
Family
ID=76798487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022320645.7U Active CN213697145U (en) | 2020-10-16 | 2020-10-16 | Universal fixed vertebral pedicle screw structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213697145U (en) |
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2020
- 2020-10-16 CN CN202022320645.7U patent/CN213697145U/en active Active
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