CN112515754B

CN112515754B - Medical instrument screw

Info

Publication number: CN112515754B
Application number: CN202011483254.5A
Authority: CN
Inventors: 张炜鹏; 张宝祥; 袁志山; 王振强; 梁思远; 姜英奇; 李君涛; 廖赞; 杨阳
Original assignee: Grinm Medical Instrument Beijing Co ltd
Current assignee: Grinm Medical Instrument Beijing Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2022-02-22
Anticipated expiration: 2040-12-15
Also published as: CN112515754A

Abstract

The application relates to the field of medical equipment, in particular to a medical equipment screw, which comprises a screw main body, a reinforcing rod arranged in the screw main body and an accessory detachably connected with the screw main body, wherein the accessory is used for connecting a traction piece, and the strength of the reinforcing rod is greater than that of the screw main body. The screw fracture reduction device has the advantages that the possibility that the medical instrument screw is fractured in the treatment process is reduced, and the clinical treatment effect is guaranteed.

Description

Medical instrument screw

Technical Field

The application relates to the field of medical equipment, in particular to a medical equipment screw.

Background

The medical device screw includes a bone screw, a maxillofacial surgical screw, an anchorage screw, and the like according to the use. Generally, the screw of the medical instrument is integrally processed by titanium alloy materials and mainly comprises a head part, a neck part and a body part; wherein, the head is designed into different shapes according to different screw systems and is mainly used for connecting the traction piece.

However, in the long treatment process, the inventor finds that the screw of the current medical appliance has the risk of being broken in the alveolar bone under the action of orthodontic force, and when the screw is broken, the screw needs to be taken out through maxillofacial surgery, so that the clinical effect can be influenced in both the breaking and the maxillofacial surgery.

In view of the above-mentioned related art, the inventors consider that there is a defect that the screw of the medical instrument is broken during the treatment to affect the correction effect.

Disclosure of Invention

In order to reduce the possibility of fracture of a medical instrument screw in the treatment process and ensure the clinical effect, the application provides the medical instrument screw.

The application provides a medical instrument screw adopts following technical scheme:

a medical instrument screw comprises a screw main body, a reinforcing rod arranged in the screw main body and an accessory detachably connected with the screw main body, wherein the accessory is used for connecting a traction piece, and the strength of the reinforcing rod is greater than that of the screw main body.

Through adopting above-mentioned technical scheme, through set up the reinforcing bar that intensity is greater than the screw main part alone in the screw main part in this application for the overall structure intensity of medical instrument screw improves greatly, has reduced the medical instrument screw and has taken place cracked possibility in the treatment process, has guaranteed the correction effect.

Preferably, the screw main body includes integrated into one piece's head, neck and somatic part, and the inside processing of screw main body has the confession reinforcing rod and stretches into mounting hole in the somatic part by the head, and the mounting hole is the internal thread hole, and reinforcing rod threaded connection is in the internal thread hole.

Through adopting above-mentioned technical scheme, threaded connection's mode makes the inseparabler of being connected between reinforcing rod and the screw main part.

Preferably, the reinforcing rod comprises a threaded rod and a hexagonal head formed at one end of the threaded rod, and reinforcing rod external threads matched with the internal threaded hole are processed on the outer wall of the threaded rod.

Through adopting above-mentioned technical scheme, the setting of hexagonal head makes things convenient for cooperation instrument centre gripping to install the reinforcing bar.

Preferably, the outer side wall of the body is provided with a body external thread, one end of the body away from the neck is a tip, and one side of the body close to the tip is provided with a cutting groove for self-tapping.

By adopting the technical scheme, the tip can reduce resistance when implanted; and the arrangement of the cutting groove enables the body part to form a self-tapping screw structure, and the connection stability of the implanted medical instrument screw is improved.

Preferably, the outer wall of the neck portion is smooth.

Through adopting above-mentioned technical scheme, the setting of smooth surface can be fully contacted with the bone after the screw is implanted to carry out better support.

Preferably, a convex ring is fixedly connected between the head part and the neck part, and a plurality of grooves which are circumferentially distributed and are matched with the convex blocks in the screw tool are processed on the outer peripheral surface of the convex ring.

Through adopting above-mentioned technical scheme, medical personnel's accessible medical instrument screw instrument lug and recess joint cooperation to rotate the medical instrument screw and implant.

Preferably, the outer wall of the head is provided with a head external thread;

the accessory comprises a fixed block in threaded connection with the external thread of the head, a cylinder fixedly connected to one end of the fixed block, and a connecting structure which is formed at one end, far away from the fixed block, of the cylinder and used for connecting a traction piece.

Through adopting above-mentioned technical scheme, threaded connection's mode is convenient for install and change.

Preferably, the connecting structure is a disc, a cross-shaped groove, a straight groove or other special shapes.

By adopting the technical scheme, different connecting structures can be selected according to requirements so as to carry out anchorage.

Preferably, the head part external thread and the body part external thread are both in a right-handed structure, and the internal thread hole is in a left-handed structure.

Through adopting above-mentioned technical scheme, when the screw main part is when the fracture, the mode of accessible anticlockwise rotation reinforcing bar takes out cracked screw main part, need not to carry out maxillofacial surgery.

Preferably, the positions of the cross-shaped groove and the straight groove at the notch are both provided with traction piece fixing grooves.

Through adopting above-mentioned technical scheme, draw the setting of a fixed ditch, conveniently draw a fixed mounting.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the medical instrument screw, the reinforcing rod with the strength greater than that of the screw main body is independently arranged in the screw main body, so that the overall structural strength of the medical instrument screw is greatly improved, the possibility of breakage of the medical instrument screw in the treatment process is reduced, and the clinical effect is ensured;

2. the external thread of the body part is set to be a right-handed structure, and the internal thread hole is set to be a left-handed structure, so that when the screw main body is broken, the broken screw main body can be taken out in a mode of anticlockwise rotating the reinforcing rod, and jaw surgery is not needed;

3. because the attachment is detachably connected with the head, medical staff can change different attachments to give different force application directions and force application sizes to teeth in different stages of the implant anchorage, and the flexibility is higher.

Drawings

FIG. 1 is a schematic view of the overall structure of a medical device screw according to embodiment 1 of the present application;

FIG. 2 is a sectional view showing the internal structure of a screw of the medical device;

FIG. 3 is a schematic structural view of a screw body embodying a medical device;

FIG. 4 is a schematic view showing a concrete structure of a reinforcing bar;

FIG. 5 is a schematic view showing a detailed structure of an attachment in embodiment 1;

FIG. 6 is a schematic view showing a specific structure of an attachment in embodiment 2 of the present application;

fig. 7 is a schematic diagram showing a specific structure of an attachment in embodiment 3 of the present application.

Description of reference numerals: 1. a screw body; 11. a head portion; 12. a neck portion; 13. a body portion; 14. an internally threaded bore; 15. a body external thread; 16. a tip; 17. cutting a groove; 18. a convex ring; 181. a groove; 19. a head external thread; 2. a reinforcing rod; 21. a threaded rod; 22. a hexagonal head; 23. an external thread of the reinforcing rod; 3. an accessory; 31. a fixed block; 32. a cylinder; 33. a connecting structure; 34. a through hole; 35. a linear groove; 36. a traction member fixing groove; 37. a cross-shaped groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses a medical instrument screw.

Example 1

Referring to fig. 1 and 2, the medical instrument screw includes a screw body 1, a reinforcing rod 2, and an attachment 3; the screw main body 1 is made of a titanium alloy material, and the titanium alloy material has good biocompatibility and meets the medical requirement; the reinforcing rod 2 is made of stainless steel or other materials with the strength higher than that of the screw main body 1, is arranged in the screw main body 1 and is mainly used for improving the integral structural strength of the medical instrument screw, so that the possibility of fracture of the medical instrument screw in the treatment process is reduced, and the correction effect is ensured; annex 3 can be dismantled and connect at screw main part 1, mainly used connects and draws the piece, and medical personnel can change annex 3 as required.

Referring to fig. 3 and 4, the screw body 1 is a rod shape and includes a head 11, a neck 12 and a body 13 which are integrally formed and sequentially arranged, a mounting hole is processed inside the screw body 1, the mounting hole penetrates through the head 11 along the axial direction of the screw body 1 and extends into the body 13, and the mounting hole is a left-handed internal thread hole 14; the reinforcing rod 2 comprises a threaded rod 21 and a hexagonal head 22 formed at one end of the threaded rod 21, reinforcing rod external threads 23 matched with the internal threaded hole 14 are processed on the outer wall of the threaded rod 21, and during installation, the hexagonal head 22 is clamped through a tool, the threaded rod 21 is screwed into the body 13 from the head 11 in a counterclockwise mode, and the strength of the screw body 1 is enhanced.

The outer side wall of the body part 13 is provided with a right-handed body external thread 15, one end of the body part 13, which is far away from the neck part 12, is a tip 16, one side of the body part 13, which is close to the tip 16, is provided with a cutting groove 17 for self-tapping, and the cutting groove 17 is arranged, so that the body part 13 forms a self-tapping screw structure, and the connection stability of the implanted medical instrument screw is improved; the outer wall of the neck 12 is smooth; a convex ring 18 protruding along the radial direction of the screw main body 1 is fixedly connected between the head part 11 and the neck part 12, a plurality of grooves 181 matched with a convex block in a screw tool of a medical instrument are processed on the outer peripheral surface of the convex ring 18, and the plurality of grooves 181 are circumferentially distributed.

During the use, drive screw main part 1 through medical instrument screw instrument and rotate in order to implant, the in-process of implanting, the resistance can be reduced in the setting of most advanced 16, changes and breaks through superficial cortex of bone, and the smooth surface of neck 12 can be fully contact with the bone after implanting to carry out better support.

Referring to fig. 3 and 5, a right-handed head external thread 19 is formed on the outer wall of the head 11; the accessory 3 comprises a fixing block 31 in threaded connection with the head external thread 19, a cylinder 32 fixedly connected to one end of the fixing block 31, and a connecting structure 33 formed at one end of the cylinder 32 far away from the fixing block 31 and used for connecting a traction part, wherein a through hole 34 penetrating in the radial direction is formed in the cylinder 32, the connecting structure 33 can be set to be any shape as required, in the embodiment, the connecting structure 33 is a disc, and the surface of the disc is an arc surface.

Example 2

Referring to fig. 6, the difference from embodiment 1 is that the connection structure 33 is still a circular disk, a straight groove 35 is formed on the circular disk, and a traction piece fixing groove 36 for connecting the traction piece is formed at the notch of the straight groove 35, and this structure is designed to apply force to one direction of the teeth after the traction piece is installed.

Example 3

Referring to fig. 7, the difference from embodiment 1 lies in the connection structure, the connection structure 33 is a connection block formed at one end of the cylinder 32 far from the fixing block 31, a strip-shaped and mutually perpendicular cross-shaped groove 37 is formed on the connection block, a traction piece fixing groove 36 for connecting a traction piece is processed at the notch of the cross-shaped groove 37, and the structural design can apply force to two directions of teeth after the traction piece is installed.

According to the medical instrument screw, the reinforcing rod 2 with the strength greater than that of the screw main body 1 is independently arranged in the screw main body 1, so that the overall structural strength of the medical instrument screw is greatly improved, the possibility of breakage of the medical instrument screw in the treatment process is reduced, and the correction effect is ensured; the external thread 15 of the body part is set to be in a right-handed structure, and the internal thread hole 14 is set to be in a left-handed structure, so that when the screw main body 1 is broken, the broken screw main body 1 can be taken out in a mode of rotating the reinforcing rod 2 anticlockwise, and jaw surgery is not needed; because the attachment 3 is detachably connected with the head 11, medical staff can change different attachment 3 to give different force application directions and different force application sizes to teeth in different stages of the implant anchorage, and the flexibility is higher.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A medical instrument screw, characterized by: the screw comprises a screw main body (1), a reinforcing rod (2) arranged in the screw main body (1) and an accessory (3) detachably connected with the screw main body (1), wherein the accessory (3) is used for connecting a traction piece, and the strength of the reinforcing rod (2) is greater than that of the screw main body (1);

the screw main body (1) comprises a head (11), a neck (12) and a body (13) which are integrally formed, a mounting hole for the reinforcing rod (2) to extend into the body (13) from the head (11) is machined in the screw main body (1), the mounting hole is an internal threaded hole (14), and the reinforcing rod (2) is in threaded connection with the internal threaded hole (14);

the outer side wall of the body part (13) is provided with a body part external thread (15), the body part external thread (15) is of a right-handed structure, and the internal thread hole (14) is of a left-handed structure;

the outer wall of the head (11) is provided with a head external thread (19); the accessory (3) comprises a fixed block (31) in threaded connection with the external thread (19) of the head, a cylinder (32) fixedly connected to one end of the fixed block (31), and a connecting structure (33) which is formed at one end, far away from the fixed block (31), of the cylinder (32) and used for connecting a traction piece.

2. The medical instrument screw of claim 1, wherein: reinforcing bar (2) include threaded rod (21) and shaping in threaded rod (21) one end hexagon head (22), processing has reinforcing bar external screw thread (23) with internal thread hole (14) assorted on the outer wall of threaded rod (21).

3. The medical instrument screw of claim 1, wherein: the end of the body part (13) far away from the neck part (12) is a tip (16), and a cutting groove (17) for self-tapping is processed on the side of the body part (13) near the tip (16).

4. The medical instrument screw of claim 1, wherein: the outer wall of the neck (12) is smooth.

5. The medical instrument screw of claim 1, wherein: a convex ring (18) is fixedly connected between the head part (11) and the neck part (12), and a plurality of grooves (181) which are distributed circumferentially and are matched with the convex blocks in the medical instrument screw tool are processed on the outer peripheral surface of the convex ring (18).

6. The medical instrument screw of claim 1, wherein: the connecting structure (33) is a disc, a cross-shaped groove (37), a straight-line-shaped groove (35) or other special shapes.

7. The medical instrument screw of claim 1, wherein: the head external thread (19) is of a right-handed structure.

8. The medical instrument screw of claim 6, wherein: and traction piece fixing grooves (36) are processed at the positions of the notches of the cross-shaped groove (37) and the straight-line-shaped groove.