CN216439298U

CN216439298U - Bone cement centrum staple

Info

Publication number: CN216439298U
Application number: CN202120071588.5U
Authority: CN
Inventors: 朱悦
Original assignee: First Hospital of China Medical University
Current assignee: First Hospital of China Medical University
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2022-05-06
Anticipated expiration: 2031-01-12

Abstract

The utility model belongs to the technical field of auxiliary instruments for orthopedic operations, and aims to solve the problems of poor fracture reduction, postoperative bone cement displacement and the like in the conventional bone cement vertebral body strengthening operation. The utility model can realize good support of the vertebral end plate and fracture reduction, and simultaneously avoid the displacement of bone cement after operation.

Description

Bone cement centrum staple

Technical Field

The utility model belongs to the technical field of auxiliary instruments for orthopedic surgery, and particularly relates to a bone cement vertebral body fixing nail.

Background

With the aging progress of population, people with osteoporosis thoracolumbar fracture are more and more, the main clinical manifestation is thoracolumbar pain, even when turning over and getting up, standing and walking, vertebral collapse and progressive kyphosis occur, even nerve function damage occurs, and the life quality of patients is seriously influenced.

At present, bone cement filling is mainly adopted for treatment, however, the bone fracture is not well restored in the operation and the bone cement is displaced after the operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a bone cement vertebral body fixing nail which is used for end plate support, fracture reduction and bone cement bolt fixation of loose bone vertebral body fracture.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a bone cement centrum staple, is including the staple afterbody, screw rod and the staple afterbody that connect gradually, screw rod and staple afterbody inside be equipped with bone cement injection channel, the screw rod include screw thread portion and stripe portion by staple afterbody orientation in proper order, screw thread portion surface be equipped with the cement injection hole of bone cement injection channel intercommunication, stripe portion include many stripes along staple circumference interval arrangement, the staple afterbody include first holding wide screw thread and thin shallow screw thread in proper order by nearly screw rod end, staple afterbody surface be equipped with the second and hold wide screw thread, the staple cross section be regular polygon.

Further: the fixing nail head is bullet-shaped.

Further: the cross section of the fixing nail is square, triangular or regular hexagonal.

Further: the length of the bone cement vertebral body fixing nail is 15-75 mm.

Further: the thickness of the outer wall of the bone cement vertebral body fixing nail is 1-2 mm.

Further: the bone cement vertebral body fixing nail is made of PEEK.

Further: the thread pitch of the thread part is 1-5 mm.

Further: the cement injection channel is an inner hexagon, an inner round hole, an inner plum blossom or an inner square.

Further: the diameter of the circumcircle of the cross section of the bone cement vertebral body fixing nail is 3-8 mm.

Further: the cement injection holes are arranged in a plurality of rows at intervals along the circumferential direction of the bone cement vertebral body fixing nail.

Compared with the prior art, the utility model has the beneficial effects that:

the fixing nail adopts a multi-layer structure of polygonal appearance, thin and shallow threads, holding wide threads and screw threads, is easy to realize good support and restoration of the collapsed endplate of the fractured vertebral body in an operation, and can avoid the displacement of bone cement after the operation due to the tight combination of the bone cement and the fixing nail.

Drawings

FIG. 1 is a schematic structural view of a bone cement vertebral body fixation nail according to the present invention;

fig. 2 is a schematic cross-sectional view of different shapes of cement injection channels of the bone cement vertebral body fixing nail of the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, a bone cement vertebral body fixing nail comprises a fixing nail head part 1, a screw rod 2 and a fixing nail tail part 3 which are connected in sequence, a bone cement injection channel 4 is arranged inside the screw rod 2 and the fixing nail tail part 3, the screw rod 2 sequentially comprises a screw thread part 21 and a stripe part 22 from the fixing nail head part 1 to the fixing nail tail part 3, a cement injection hole 212 communicated with the bone cement injection channel 4 is formed in the surface of the screw thread part 21, the stripe part 22 comprises a plurality of stripes 221 which are arranged at intervals along the circumferential direction of the fixing nail, the fixing nail tail part 3 sequentially comprises a first holding wide thread 31 and a thin and shallow thread 32 from the end close to the screw rod 2, a second holding wide thread 12 is arranged on the surface of the fixing nail head part 1, and the cross section of the fixing nail is a regular polygon.

The fixing nail adopts a polygonal appearance, thin and shallow threads, holding wide threads and screw threads are combined with human vertebral body tissues in a multi-level manner, so that bone cement is not easy to displace.

In some embodiments of the utility model, the said staple head 1 is bullet-shaped and comprises a second wide holding thread 12 and a tip 11, the tip 11 makes the staple easily enter the vertebra of the human body, and the second wide holding thread 12 makes the staple better engage with the vertebra.

In some embodiments of the present invention, the cross section of the fixing nail is square, triangular or regular hexagonal, and it should be noted that the specific number of sides of the polygon is not limited as long as the displacement of the bone cement can be prevented, and the polygon is obviously combined more firmly than the circle.

In some embodiments of the present invention, the length of the bone cement vertebral body fixing nail is 15-75mm, and the length of the fixing nail is selected according to needs, and may be 40mm, 50mm, etc.

In some embodiments of the present invention, the thickness of the outer wall of the bone cement vertebral body fixing nail is 1-2mm, and too thick outer wall tends to waste materials, and also increases the volume of the fixing nail or thins the cement injection channel 4, which may affect the overall strength of the fixing nail.

In some embodiments of the present invention, the bone cement vertebral body fixation nail is made of PEEK material, which can ensure better fusion between the fixation nail and human tissue, and of course, the bone cement vertebral body fixation nail material of the present invention is not limited to the above materials, and may be other materials that can be used for 3D printing.

In some embodiments of the present invention, the pitch of the threaded portion is 1-5mm, the size of the pitch is not limited, and different pitches may be set as required.

In some embodiments of the present invention, the cement injection channel 4 is an inner hexagon, an inner round hole, an inner quincunx or an inner square.

In some embodiments of the present invention, the diameter of the circumscribed circle of the cross-section of the bone cement vertebral body fixation nail is 3-8mm, the diameter is generally determined according to the size of the internal cement injection channel 4, the wall thickness, and other factors, and a suitable diameter is selected according to requirements.

In some embodiments of the present invention, the cement injection holes 212 are spaced in multiple rows along the circumference of the bone cement vertebral body fixation nail, the number and arrangement form of the cement injection holes 212 are not limited, and the uniform arrangement along the circumference can ensure uniform cement injection and increase firmness.

The number of the stripe portions 22, and the shape, width, depth, etc. of the internal stripe portions are not limited, and parameters different from those for holding the wide thread and the fine thread may be set, so that the firmness of the fastening nail may be increased.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a bone cement centrum staple which characterized in that: comprises a fixed nail head (1), a screw rod (2) and a fixed nail tail (3) which are connected in sequence, a bone cement injection channel (4) is arranged inside the screw rod (2) and the fixing nail tail part (3), the screw (2) sequentially comprises a thread part (21) and a stripe part (22) from the head part (1) to the tail part (3) of the fixing nail, the surface of the thread part (21) is provided with a cement injection hole (212) communicated with the bone cement injection channel (4), the stripe part (22) comprises a plurality of stripes (221) which are arranged at intervals along the circumferential direction of the fixing nail, the tail part (3) of the fixing nail sequentially comprises a first holding wide thread (31) and a thin and shallow thread (32) from the end close to the screw rod (2), the surface of the head part (1) of the fixing nail is provided with a second holding wide thread (12), and the cross section of the fixing nail is in a regular polygon shape.

2. The bone cement vertebral body fixation nail of claim 1, wherein: the fixing nail head part (1) is bullet-shaped.

3. The bone cement vertebral body fixation nail of claim 1, wherein: the cross section of the fixing nail is square, triangular or regular hexagonal.

4. The cement vertebral body fixation nail as recited in claim 1, wherein: the length of the bone cement vertebral body fixing nail is 15-75 mm.

5. The bone cement vertebral body fixation nail of claim 1, wherein: the thickness of the outer wall of the bone cement vertebral body fixing nail is 1-2 mm.

6. The bone cement vertebral body fixation nail of claim 1, wherein: the bone cement vertebral body fixing nail is made of PEEK.

7. The bone cement vertebral body fixation nail of claim 1, wherein: the thread pitch of the thread part is 1-5 mm.

8. The bone cement vertebral body fixation nail of claim 1, wherein: the cement injection channel (4) is an inner hexagon, an inner round hole or an inner square.

9. The bone cement vertebral body fixation nail of claim 1, wherein: the diameter of the circumscribed circle of the cross section of the bone cement vertebral body fixing nail is 3-8 mm.

10. The bone cement vertebral body fixation nail of claim 1, wherein: the cement injection holes (212) are arranged along the circumference of the bone cement vertebral body fixing nail at intervals in a plurality of rows.