CN110101489B

CN110101489B - Non-notch fusion device

Info

Publication number: CN110101489B
Application number: CN201910372657.3A
Authority: CN
Inventors: 孙宇; 楚海华; 赖玉树; 邓山; 甄超
Original assignee: Peking University Third Hospital Peking University Third Clinical Medical College; Tianjin Zhengtian Medical Instrument Co Ltd
Current assignee: Peking University Third Hospital Peking University Third Clinical Medical College; Tianjin Zhengtian Medical Instrument Co Ltd
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2023-09-12
Anticipated expiration: 2039-05-06
Also published as: CN110101489A

Abstract

The utility model provides a no notch fusion device, belongs to interbody fusion cage technical field, no notch fusion device includes: the tooth structure comprises a first tooth piece and a plurality of second tooth pieces which are linked with the first tooth piece, and the positioning structure is arranged on each second tooth piece, so that when fusion fixation operation between two bones is carried out, the plurality of positioning structures can be effectively drilled into the corresponding bones by only rotating one first tooth piece, and the operation time is shortened.

Description

Non-notch fusion device

Technical Field

The invention relates to a non-incision fusion device, in particular to a non-incision fusion device which is used for being led in by an interbody fusion cage screw.

Background

Currently, humans develop symptoms such as spinal compression of nerves with age. When spinal compression of nerves occurs, a medical facility typically employs spinal fusion procedures to secure a plurality of bone screws between the vertebrae of a particular section so that the vertebrae of that section are not displaced, forcing the patient to no longer move the vertebrae of that section so that the vertebrae of that section are no longer compressing the nerves.

In the process of performing the spinal fusion surgery, a plurality of bone nails 1 are respectively and obliquely planted on the corresponding two bones 9 through the oblique holes 80 of the bone fragments 8 on the affected part, and the wound is sutured again as shown in fig. 1.

Only in the operation, a plurality of bone nails 1 are needed to be planted on the bone 9 one by one, which results in long operation time, and because a gap t is needed between the bone nail 1 and the inclined hole 80 to facilitate the planting operation, medical staff easily shake the bone nail 1 to cause the bone nail 1 to incline and deviate, which results in poor planting angle of the bone nail 1 and poor activity state of the bone 9 after the operation.

Therefore, how to overcome the above problems of the prior art has become a problem to be solved.

Disclosure of Invention

To solve the above-mentioned problems of the prior art, the present invention provides a non-notch (zero-notch) fusion device, comprising: a base; the tooth structure is arranged on the base and can move relative to the base, and comprises a first tooth piece and at least one second tooth piece which is linked with the first tooth piece; and at least one positioning structure arranged on the second tooth piece and capable of being matched with the tooth structure to displace relative to the base.

In the aforementioned non-notch fusion device, the tooth structure is a helical tooth assembly.

In the aforementioned non-notch fusion device, the first tooth member is linearly displaced relative to the base.

In the aforementioned non-notch fusion device, the second tooth member is linearly displaced relative to the base.

In the aforementioned non-notch fusion device, the first tooth member drives the second tooth member by a third tooth member. For example, the self-rotation of the first tooth member will make the second tooth member self-rotate by the transmission of the third tooth member.

In the aforementioned non-notch fusion device, the first tooth member drives a plurality of the positioning structures.

In the aforementioned non-notch fusion device, the second tooth member has a through hole, so that the positioning structure is tightly matched with the through hole to fixedly connect the second tooth member.

In the aforementioned non-notch fusion device, the positioning structure is inclined and displaced relative to the base.

In the aforementioned non-notch fusion device, the positioning structure is a bone screw.

In the aforementioned non-notch fusion device, the first tooth member engages the second tooth member.

In the aforementioned non-notch fusion device, the first tooth member is a tooth plate.

In the aforementioned non-notch fusion device, the second tooth member and the positioning structure are integrally formed.

In the aforementioned incisionless fusion apparatus, the base has a guiding structure that engages the first tooth member or the second tooth member.

Therefore, in the non-incision fusion device, the tooth structure is designed mainly, so that when fusion operation between two vertebrae is performed, a plurality of positioning structures can be effectively drilled into corresponding vertebrae bones by only rotating one first tooth piece, compared with the prior art, the non-incision fusion device can shorten operation time, and the positioning structure is fixedly connected with the second tooth piece, so that the problem that the implantation angle of the positioning structure is poor due to inclination deviation of the positioning structure is avoided.

Drawings

Fig. 1 is a schematic side plan view of a prior art bone screw.

Fig. 2A is a schematic perspective view of a first embodiment of a non-notch fusion device of the present invention.

Fig. 2B is a schematic top plan view of a first embodiment of a non-notch fusion device of the present invention.

Fig. 2C is a schematic partial side cross-sectional view of a first embodiment of a non-notch fusion device of the present invention.

FIG. 3 is a schematic view of a second embodiment of the non-notch fusion device of the present invention.

Symbol description:

1. bone nail

2,3 non-notch fusion device

20,30 base

200,300 guide structure

21,31 tooth structure

210. Perforation

211,311 first tooth

211a end rod

212a,212b,312a,312b second tooth

213. Third tooth member

22,32 positioning structure

311a tooth groove

8. Bone slice

80,310 inclined hole

9. Bone

t gap

R direction of rotation

Direction of Z-line movement

F1, F2 arrow direction

Detailed Description

Further advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure by describing embodiments of the present invention with specific examples.

It should be noted that, the structures, proportions, sizes, etc. shown in the drawings are merely for the purpose of understanding and reading the disclosure, and are not intended to limit the applicable scope of the invention, and any structural modification, change in proportions, or adjustment of sizes, without affecting the efficacy of the invention or the objects achieved, should fall within the scope of the disclosure. Also, the terms "upper", "first", "second", and "a" and "an" as used in the present specification are merely for clarity of description, and are not intended to limit the scope of the invention, which is defined by the relative changes or modifications, but are also to be construed as being within the scope of the invention without substantial changes.

Fig. 2A to 2C are schematic views of a first embodiment of the non-notch fusion device 2 of the present invention. In this embodiment, the non-incisional fusion apparatus 2 is used to fix a position between two bones.

As shown in fig. 2A, the notch-free fusion device 2 includes: a base 20, a tooth structure 21 and at least one positioning structure 22.

The base 20 is a metal frame, such as a rectangular body, which can rest on the bone or be placed in the human body. It should be appreciated that the base 20 is of a wide variety, such as bone chips, and the invention is not limited in this regard.

The tooth structure 21 is disposed on the base 20 and capable of being displaced relative to the base 20, and comprises a first tooth 211 and a plurality of second teeth 212A,212B coupled to the first tooth 211, and the positions of the two teeth relative to the base can be designed according to requirements, such as axial connection as shown in fig. 2A or diagonal connection as shown in fig. 2B.

In the present embodiment, the tooth structure 21 is a bevel gear combination, for example, the first tooth member 211 or the second tooth members 212a,212b are bevel gears, bevel gears or other bevel gears, which are not particularly limited in the present invention.

Furthermore, the first tooth 211 is a cylinder, which can be linearly displaced with respect to the base 20. For example, the first tooth 211 moves linearly together when rotating, as shown in fig. 2C in the rotation direction R and the linear movement direction Z. Specifically, the base 20 is provided with a guiding structure 200, such as a rail, for the end bar 211a of the first tooth 211 to linearly displace along the guiding structure 200, for example, the end bar 211a of the first tooth 211 is screwed with the guiding structure 200 of the base 20 to perform a nail-like drilling or drilling action. It should be appreciated that the manner of linear displacement is numerous and not limited to the foregoing.

The first tooth 211 drives the second teeth 212a,212b via the third tooth 213. For example, the third gear element 213 is engaged between the first gear element 211 and the second gear element 212a,212b, such that the rotation of the first gear element 211 rotates the second gear element 212a,212b by the transmission of the third gear element 213, and the first gear element 211, the third gear element 213 and the second gear element 212a,212b move linearly.

The positioning structure 22 is provided on the second teeth 212a,212b and is capable of being displaced relative to the base 20 in cooperation with the tooth structure 21.

In this embodiment, the positioning structure 22 is a bone screw, which is obliquely displaced relative to the base 20. Specifically, the second teeth 212a,212b have through holes 210, such that the positioning structure 22 is disposed through the through holes 210, for example, the positioning structure 22 is tightly fitted into the through holes 210 to fix the second teeth 212a,212b. The variety of bone nails is wide, and the present invention is not particularly limited thereto.

Furthermore, the first teeth 211 indirectly drive the second teeth 212a,212b to drive the plurality of positioning structures 22.

When the non-incised fusion apparatus 2 is used, the base 20 is placed on two bones or between two bones, and the end bar 211a is used to rotate the first tooth member 211 so that the second tooth members 212a,212b will drive the positioning structures 22 to rotate synchronously, at this time, since the first tooth member 211 and the second tooth members 212a,212b will displace linearly relative to the base 20 (the rotation direction R and the linear movement direction Z shown in fig. 2C), the positioning structures 22 will drill into the corresponding bones obliquely towards the bone direction.

In other words, the power transmission of the non-notch fusion device 2 takes the first tooth 211 as an input port and the positioning structure 22 as an output port, so that the configuration of the non-notch fusion device 2 can be changed according to the power transmission path.

Therefore, the inventive incisionless fusion apparatus 2 can effectively drill a plurality of positioning structures 22 into corresponding bones by only rotating a first tooth 211 when performing positioning operation between two bones by the design of the tooth structure 21, so that compared with the prior art, the inventive incisionless fusion apparatus 2 can shorten operation time, and the positioning structure 22 is tightly matched with the through hole 210 to fixedly connect the second tooth 212a,212b, so as to avoid the problem of poor implantation angle of the positioning structure 22 caused by inclination deviation of the positioning structure 22.

Furthermore, the tooth structure 21 is a bevel gear assembly, so as to facilitate the inclination displacement of the positioning structure 22 relative to the base 20. It should be appreciated that if the tooth structure 21 is a spur gear, the positioning structure 22 can be inclined relative to the base 20 by tilting the aperture 210 relative to the base 20 to form a hole.

In addition, the tooth structure 21 can be positioned outside or inside the skin during the positioning operation, so that the dimension of the tooth structure 21 can be designed according to the requirement. It should be appreciated that if the tooth structure 21 is located outside the skin, the positioning structure 22 may be a longer bone pin or may be mounted on the second tooth members 212a,212b with assistance to support a shorter bone pin.

Fig. 3 is a schematic view of a second embodiment of the non-notch fusion device 3 of the present invention. The main difference between the present embodiment and the first embodiment is that the third tooth member is omitted, and other structures and operation principles are substantially the same, so that the description of the same will not be repeated.

As shown in fig. 3, the tooth structure 31 includes a first tooth member 311 and a plurality of second tooth members 312a,312b engaging the first tooth member 311, and the positioning structure 32 is integrally formed with the second tooth members 312a,312b to omit the through hole 210.

In this embodiment, the first tooth member 311 is a tooth plate which rotates in place relative to the base 30 without linear displacement and has at least one tooth channel 311a for engaging the second tooth members 312a,312b.

Further, the second tooth members 312a,312b act as surface threads for the positioning structure 32 to engage the first tooth member 311.

In addition, the base 30 is formed with a toothed guide structure 300 for engaging the second toothed members 312a,312b, and the base 30 may have a plurality of inclined holes 310 as required for the positioning structure 32 to movably penetrate through the inclined holes 310, and the guide structure 300 is located outside one side of the inclined holes 310.

In using the non-incised fusion apparatus 3, the base 30 is placed on two bones or between two bones, the first tooth 311 is rotated by a tool (such as a screwdriver) to make the tooth grooves 311a stir the second tooth 312a,312b, so that the second tooth 312a,312b rotate synchronously (if there are two tooth grooves 311 a) or sequentially (if there is only a single tooth groove 311 a), at this time, the guiding structure 300 cooperates with the moving guide of the first tooth 311 to drive the second tooth 312a,312b to advance toward a predetermined direction (arrow direction F1, F2 shown in fig. 3), and since the positioning structure 32 is integrated with the second tooth 312a,312b, the positioning structure 32 and the second tooth 312a,312b displace together along the inclined hole 310, so that the positioning structure 32 is inclined toward the bone to drill into the corresponding bone.

Therefore, the inventive incisionless fusion apparatus 3 is designed by the tooth structure 31, so that when a positioning operation is performed between two bones, only the first tooth member 311 is required to be rotated to effectively drill the plurality of positioning structures 32 into the corresponding bones, and compared with the prior art, the inventive incisionless fusion apparatus 3 can shorten the operation time, and the positioning structures 32 and the second tooth members 312a,312b are integrally formed, thereby avoiding the problem of poor implantation angle of the positioning structures 32 caused by inclination deviation of the positioning structures 32.

Furthermore, the design of the inclined hole 310 and the guiding structure 300 facilitates the inclined displacement of the positioning structure 32 relative to the base 30.

In addition, the tooth structure 31 can be positioned outside or inside the skin during the positioning operation, so the dimension of the tooth structure 31 can be designed according to the requirement. It should be appreciated that if the tooth structure 31 is located outside the skin, the positioning structure 32 may be a longer bone pin or may be mounted on the second tooth members 312a,312b with assistance to support a shorter bone pin.

In summary, according to the present invention, the tooth structure is designed to effectively drill a plurality of positioning structures into corresponding bones by only rotating one first tooth member when performing positioning operation between two bones, so that compared with the prior art, the present invention can shorten operation time, and the problem of poor implantation angle of the positioning structure due to inclination deviation of the positioning structure due to the positioning structure being fixedly connected with the second tooth member is avoided.

The above-described embodiments are intended to illustrate the principles of the present invention and its efficacy, but not to limit the invention. Modifications to the above would be obvious to those of ordinary skill in the art, without departing from the spirit and scope of the present invention. The scope of the invention is therefore intended to be covered by the following claims.

Claims

1. A no-incision fusion device for use as an interbody fusion cage, comprising:

a base;

the tooth structure is arranged on the base and can move relative to the base, and comprises a first tooth piece and at least one second tooth piece which is linked with the first tooth piece; and

at least one positioning structure which is only arranged on the second tooth piece and can be matched with the tooth structure to displace relative to the base;

wherein the tooth structure is a bevel gear combination;

the first tooth piece and the second tooth piece are linearly displaced relative to the base;

the positioning structure is a bone nail which is inclined and displaced relative to the base;

the base is provided with a guide structure which is meshed with the first tooth piece, the first tooth piece is a column body, an end rod is arranged on the first tooth piece, and the end rod is in threaded connection with the guide structure of the base.

2. The notch-free fusion device of claim 1 wherein the first tooth is driven by a third tooth to drive the second tooth.

3. The notch-free fusion device of claim 1 wherein the first tooth carries a plurality of the alignment structures.

4. The notch-free fusion device of claim 1 wherein the second tooth has a perforation such that the positioning structure is a close fit with the perforation to secure the second tooth.

5. The notch-free fusion device of claim 1 wherein the first tooth engages the second tooth.

6. The notch-free fusion device of claim 1 wherein the first tooth is a tooth plate.

7. The notch-free fusion device of claim 1 wherein the second tooth member is integrally formed with the locating formation.