CN213963599U

CN213963599U - Universal nail for thoracolumbar spine nail rod internal fixing system

Info

Publication number: CN213963599U
Application number: CN202022516846.4U
Authority: CN
Inventors: 高建华; 高山; 张晓娜; 武文斌
Original assignee: Beijing Hua Kang Tian Yi Bio Tech Co ltd
Current assignee: Beijing Hua Kang Tian Yi Bio Tech Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-08-17
Anticipated expiration: 2030-11-04

Abstract

The utility model discloses a universal nail used for an internal fixing system of thoracolumbar rod nails, which comprises a nail cap, a snap ring and a ball head nail; nailing a cap: the left end of the nail head is internally provided with nail cap threads, the right end of the nail cap is internally provided with a bottom hole, and the right end of the bottom hole is provided with a clamping ring groove; snap ring: the outer cambered surface of the clamping ring is rotatably connected with the inner wall of the bottom hole, a clamping ring spherical surface is arranged inside the clamping ring, and a through hole is formed in the right end of the clamping ring; ball head nailing: the left end of the universal nail is provided with the ball head, the right end of the ball head is provided with the neck, the left side of the ball head is provided with the ball head top surface, the ball head is connected with the inner wall of the bottom hole in a rotating mode, the right end of the outer arc surface of the ball head is connected with the spherical surface of the clamping ring in a sliding mode, the front side and the rear side of the left end of the nail cap are provided with the side surface grooves, the middle of the nail cap is provided with the U-shaped groove, the universal nail for the thoracolumbar vertebra nail rod internal fixing system only needs to be designed with one nail cap, all ball head nails can be met, the structure is simple, the assembly is simple, and the processing is convenient.

Description

Universal nail for thoracolumbar spine nail rod internal fixing system

Technical Field

The utility model relates to the technical field of medical appliances, in particular to an universal nail for an internal fixing system of thoracolumbar rod nails.

Background

Along with the improvement of living standard, the improvement of medical standard and the acceleration of living rhythm, doctors and patients have higher and higher requirements on a series of complications brought by the prior spine disease operations and operations, various spinal deformities comprise idiopathic and congenital scoliosis, kyphosis, single-segment or multi-segment spine fracture, single-segment or multi-segment spine instability, degenerative spine disease and the like, the thoracolumbar rod internal fixing system forms a frame structure which accords with the mechanical principle in a human body in a rod form to help maintain the normal function and physiological function of the human body, the thoracolumbar rod internal fixing system generally comprises one-way nails, universal nails, round rods, transverse connectors and screw plugs, the prior thoracolumbar rod internal fixing system is difficult to obtain good treatment of the spine disease, the movement of the post-operation patients is severely limited, the living of the patients is seriously inconvenient, the prior universal nails need to design nail cap structures with a plurality of specifications for different diameters, in addition, the existing universal nail has more parts, increases the cost and the operation difficulty, and simultaneously has influence on the orthopedic surgery because the parts increase the size and the weight of the multi-axis universal nail.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide an universal nail for chest lumbar vertebrae nail stick internal fixation system, only need design out a head of a nail just can satisfy all bulb nails, constitute simple structure, the assembly is simple, convenient processing can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a universal nail for an internal fixing system of a thoracolumbar rod comprises a nail cap, a snap ring and a ball head nail;

nailing a cap: the left end of the nail head is internally provided with nail cap threads, the right end of the nail cap is internally provided with a bottom hole, and the right end of the bottom hole is provided with a clamping ring groove;

snap ring: the outer cambered surface of the clamping ring is rotatably connected with the inner wall of the bottom hole, a clamping ring spherical surface is arranged inside the clamping ring, and a through hole is formed in the right end of the clamping ring;

ball head nailing: its left end is equipped with the bulb, the right-hand member of bulb is equipped with the neck, the left side of bulb is equipped with the bulb top surface, the bulb rotates with the inner wall of bottom hole to be connected, the extrados right-hand member and the snap ring sphere sliding connection of bulb, the assembly methods of snap ring has been adopted, the bulb is followed closely and is assembled in the head of a nail through the bottom hole of head of a nail, consequently, the bulb portion of bulb nail does not receive the restriction of bulb nail cortex bone screw thread and cancellous bone screw thread diameter, can assemble in a head of a nail to the bulb nail of different diameters, only need design a head of a nail and just can satisfy all bulb nails, constitute simple structure, the assembly is simple, and convenient processing.

Furthermore, side grooves are formed in the front side and the rear side of the left end of the nail cap, a U-shaped groove is formed in the middle of the nail cap, and the side grooves are matched with surgical instruments for use and used for holding the ball head nail.

Furthermore, a hexagonal groove is formed in the top surface of the ball head, and the hexagonal groove is matched with a hexagonal wrench of a surgical instrument for use, so that the ball head nail is implanted into a human body.

Furthermore, the left end of the nail body of the ball head nail is provided with a cortical bone thread, the right end of the nail body of the ball head nail is provided with a cancellous bone thread, the thread pitch of the cancellous bone thread is larger than that of the cortical bone thread, and the cortical bone thread and the cancellous bone thread can enable the ball head nail to be better held after being implanted into a human body.

Furthermore, the middle part of the clamping ring is provided with a bayonet, the outer contour of the bayonet is pressed to deform by extruding the bayonet, and the clamping ring is attached to the neck of the ball stud and assembled into the stud cap.

Compared with the prior art, the beneficial effects of the utility model are that: this a bulb nail for chest lumbar vertebrae nail stick internal fixation system has following benefit:

the screw thread of the nail head is matched with the screw plug in the thoracolumbar spine nail rod internal fixing system, the side groove is matched with a surgical instrument for use and is used for holding the ball head nail, the U-shaped groove is matched with the round rod in the thoracolumbar spine nail rod internal fixing system, the diameter of the bottom of the U-shaped groove is the same as that of the round rod and is matched with the round rod, the clamping ring groove is used for placing the clamping ring, the head of the ball head nail is placed in the bottom hole, the ball head nail is prevented from falling off the nail head under the action of the clamping ring, the spherical surface of the clamping ring is matched with the spherical surface of the ball head nail, the ball head nail can freely rotate in the nail head, the diameter size of the through hole is smaller than the maximum diameter size of the ball head nail and is prevented from falling off the nail head, the outer contour of the clamping opening is deformed by extruding the clamping opening and is attached to the neck of the ball head nail and is assembled in the nail head, the hexagonal groove is matched with the hexagonal wrench of the surgical instrument for use and implanting the ball head nail into a human body, the top surface of the ball head nail is contacted with the round rod and is matched with the spherical surface of the clamping ring, the convenient snap ring of neck assembles in the head of a nail, also can enlarge the home range of bulb nail, cortex bone screw thread and cancellous bone screw thread can let the bulb nail implant have better control power after the human body, the assembly methods of snap ring has been adopted, the bulb nail assembles in the head of a nail through the bottom hole of head of a nail, consequently, the bulb portion of bulb nail does not receive the restriction of bulb nail cortex bone screw thread and cancellous bone screw thread diameter, can assemble in a head of a nail cap to the bulb nail of different diameters, only need design a head of a nail and just can satisfy all bulb nails, constitute simple structure, the assembly is simple, convenient processing.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a sectional view of the internal structure of the present invention.

In the figure: 1 nail cap, 11 nail cap threads, 12 side grooves, 13U-shaped grooves, 14 clamping ring grooves, 15 bottom holes, 2 clamping rings, 21 clamping ring spherical surfaces, 22 through holes, 23 bayonets, 3-ball nails, 31 hexagonal grooves, 32-ball top surfaces, 33 balls, 34 necks, 35 cortical bone threads and 36 cancellous bone threads.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a universal nail for a thoracolumbar rod internal fixation system comprises a nail cap 1, a snap ring 2 and a ball head nail 3;

a nail cap 1: a screw cap thread 11 is arranged inside the left end of the screw cap, the screw cap thread 11 is matched with a screw plug in a thoracolumbar screw rod internal fixing system, a bottom hole 15 is arranged inside the right end of a screw cap 1, a clamping ring groove 14 is arranged at the right end of the bottom hole 15, the clamping ring groove 14 is used for placing a clamping ring 2, side grooves 12 are arranged on the front side and the rear side of the left end of the screw cap 1, the side grooves 12 are matched with surgical instruments for use and used for holding a ball head screw 3, and a U-shaped groove 13 is arranged in the middle of the screw cap 1;

snap ring 2: the outer arc surface of the clamping ring is rotationally connected with the inner wall of the bottom hole 15, a clamping ring spherical surface 21 is arranged inside the clamping ring 2, a through hole 22 is arranged at the right end of the clamping ring 2, and a bayonet 23 is arranged in the middle of the clamping ring 2;

and 3, ball stud: its left end is equipped with bulb 33, the right-hand member of bulb 33 is equipped with neck 34, through extrusion bayonet 23, press bayonet 23 outline deformation, the laminating is at the neck 34 of bulb nail 3, the left side of bulb 33 is equipped with bulb top surface 32, bulb 33 rotates with the inner wall of bottom hole 15 to be connected, the extrados right-hand member of bulb 33 and snap ring sphere 21 sliding connection, bulb top surface 32 inside of bulb 33 is equipped with hexagonal groove 31, the nail body left end of bulb nail 3 is equipped with cortical bone screw thread 35, the nail body right-hand member of bulb nail 3 is equipped with cancellous bone screw thread 36, the pitch of cancellous bone screw thread 36 is greater than the pitch of cortical bone screw thread 35, cortical bone screw thread 35 and cancellous bone screw thread 36 can let the bulb nail 3 have better power of controlling after implanting the human body.

When in use: the screw cap thread 11 is matched with a screw plug in a thoracolumbar spine nail rod internal fixing system, the side groove 12 is matched with a surgical instrument for use and is used for holding the ball head nail 3, the U-shaped groove 13 is matched with a round rod in the thoracolumbar spine nail rod internal fixing system, the diameter of the bottom of the U-shaped groove 13 is the same as that of the round rod and is matched with the round rod, the snap ring groove 14 is used for placing the snap ring 2, the bottom hole 15 is used for placing the head part of the ball head nail 3, the snap ring 2 prevents the ball head nail from being separated from the nail cap 1, the snap ring spherical surface 21 is matched with the spherical surface of the ball head nail 33, the ball head nail 3 can freely rotate in the nail cap 1, the diameter size of the through hole 22 is smaller than the maximum diameter size of the ball head nail 3 to prevent the ball head nail 3 from being separated from the nail cap 1, the snap 23 is pressed to deform the outer contour of the snap ring and is attached to the neck part 34 of the ball head nail 3 and is assembled in the nail cap 1, the hexagonal groove 31 is matched with the surgical instrument hexagonal wrench for use and is used for implanting the ball head nail 3 into a human body, the ball head top surface 32 is matched with the ball head nail spherical surface 33 and the clamping ring spherical surface 21 through the round rod contact, the neck 34 facilitates the clamping ring to be assembled in the nail cap, the moving range of the ball head nail 3 can be enlarged, and the cortical bone threads 35 and the cancellous bone threads 36 can enable the ball head nail 3 to have better holding force after being implanted into a human body.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a universal nail for chest lumbar vertebrae nail stick internal fixation system which characterized in that: comprises a nail cap (1), a snap ring (2) and a ball head nail (3);

nail cap (1): a nail cap thread (11) is arranged inside the left end of the nail head, a bottom hole (15) is arranged inside the right end of the nail cap (1), and a clamping ring groove (14) is arranged at the right end of the bottom hole (15);

snap ring (2): the outer arc surface of the clamping ring is rotationally connected with the inner wall of the bottom hole (15), a clamping ring spherical surface (21) is arranged inside the clamping ring (2), and a through hole (22) is arranged at the right end of the clamping ring (2);

ball stud (3): the left end of the ball head (33) is provided with a ball head (33), the right end of the ball head (33) is provided with a neck (34), the left side of the ball head (33) is provided with a ball head top surface (32), the ball head (33) is rotatably connected with the inner wall of the bottom hole (15), and the right end of the extrados surface of the ball head (33) is slidably connected with the clamping ring spherical surface (21).

2. The universal nail for thoracolumbar rod internal fixation system according to claim 1, wherein: both sides all are equipped with side groove (12) around the left end of nail cap (1), and the middle part of nail cap (1) is equipped with U type groove (13).

3. The universal nail for thoracolumbar rod internal fixation system according to claim 1, wherein: a hexagonal groove (31) is formed in the ball head top surface (32) of the ball head (33).

4. The universal nail for thoracolumbar rod internal fixation system according to claim 1, wherein: the left end of the nail body of the ball head nail (3) is provided with a cortical bone thread (35), the right end of the nail body of the ball head nail (3) is provided with a cancellous bone thread (36), and the thread pitch of the cancellous bone thread (36) is larger than that of the cortical bone thread (35).

5. The universal nail for thoracolumbar rod internal fixation system according to claim 1, wherein: the middle part of the snap ring (2) is provided with a bayonet (23).