Fibroin interface screw

Abstract

The utility model discloses a silk protein interface screw which comprises an interface screw body, an external thread body is arranged on the surface of the interface screw body, a penetrating hole is formed in the external thread body, a filling hole is formed in the surface of the interface screw body, and a first through hole is formed in the interface screw body. Through the arrangement of the second through hole, bone debris can enter the first through hole from the second through hole, so that the amount of the bone debris located between the screw tip and the inner wall of the bone marrow channel is reduced, extrusion to the bone marrow channel in the interface screw body implanting process is reduced, and the functional medicine is arranged in the filling hole, so that growth of bone tissue can be accelerated, and the bone marrow channel implanting effect is improved. Along with absorption of the functional medicine, the filling holes become empty, bone tissue continuously grows and is embedded into the penetrating holes and the filling holes, binding force is generated, rotation, front-back movement and sliding of the interface screw body can be limited, the interface screw body is made to be difficult to fall off, and the problem that postoperative looseness is prone to occurring is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a silk protein interface screw. Background Art

[0002] With the rapid development of modern society, the number of patients undergoing bone defect repair and fracture internal fixation has increased rapidly, and patients have put forward higher requirements for safe and effective implants and implantable medical devices. Bone repair interface screws are commonly used internal fixation devices, playing an irreplaceable role in bone defect repair and functional reconstruction. Silk fibroin is an extract of natural silk. After modification, it has excellent mechanical properties and physical and chemical properties, as well as good human biocompatibility and biodegradability. The degradation products are amino acids and polypeptides, which are non-toxic to the human body. Silk fibroin has good bone induction activity and can promote the growth, proliferation, differentiation and other biological functions of osteoblasts. It has gradually become an excellent candidate material for the preparation of bone repair screws.

[0003] Therefore, silk protein interface screws can be used for fixation in minimally invasive surgeries on soft tissues such as tendons and ligaments and bones. However, traditional interface screws are not easy to induce bone growth around the bone canal after implantation, lack anti-falling measures, and are prone to postoperative loosening. Therefore, a silk protein interface screw is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a silk protein interface screw, which solves the problems in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A silk protein interface screw comprises an interface screw body, the surface of the interface screw body is provided with an external thread body, the interior of the external thread body is provided with a through hole, the surface of the interface screw body is provided with a filling hole, the interior of the interface screw body is provided with a first through hole, one end of the interface screw body is provided with a screw tip, and the other end of the interface screw body is provided with a screw head.

[0007] Preferably, the number of the perforations is multiple and they are arranged in a circular array.

[0008] Preferably, the number of the filling holes is multiple groups, and the filling holes are located on the bottom surface of the perforation.

[0009] Preferably, the first through hole is in a cone shape, and the area of ​​its cross section gradually decreases along the drilling direction of the interface screw body.

[0010] Preferably, reinforcing ribs are fixedly installed inside the first through hole, and the number of the reinforcing ribs is three groups.

[0011] Preferably, a second through hole is formed inside the screw tip, and the second through hole is connected to the first through hole.

[0012] Preferably, a driving hole is opened inside the screw head, and the driving hole is set to be a regular polygon.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the silk protein interface screw, through the arc-shaped design of the screw tip, reduces the irritation and damage to the soft tissue after the interface screw body is implanted; through the provision of the second through hole, bone debris can enter the first through hole from the second through hole, so as to reduce the amount of bone debris between the screw tip and the inner wall of the medullary canal, and reduce the squeezing of the medullary canal during the implantation of the interface screw body; and by providing functional drugs inside the filling hole, the growth of bone tissue can be accelerated; with the absorption of the functional drugs, the filling hole becomes empty, and the bone tissue continues to grow and embed into the perforation and the filling hole, generating a binding force, which can limit the rotation, forward and backward movement and sliding of the interface screw body, making it difficult for the interface screw body to fall off, thereby solving the problem of easy postoperative loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the positive measurement of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the first sectional view of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the second sectional view of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the third sectional view of the utility model.

[0018] In the figure: 1. Interface screw body; 2. External thread body; 3. Perforation; 4. Filling hole; 5. First through hole; 6. Reinforcing rib; 7. Screw tip; 8. Second through hole; 9. Screw head; 10. Drive hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example: Refer to Figure 1-4The utility model provides a technical solution, a silk protein interface screw, including an interface screw body 1, an external thread body 2 is arranged on the surface of the interface screw body 1, and a perforation 3 is opened inside the external thread body 2. The number of the perforations 3 is multiple groups, and they are arranged in a circular array. Through the setting of the perforations 3, it is convenient for bone tissue to enter and contact the medicine inside the filling hole 4. The surface of the interface screw body 1 is provided with filling holes 4. The number of the filling holes 4 is multiple groups, and the filling holes 4 are located on the bottom surface of the perforations 3. Through the setting of the filling holes 4, functional drugs are arranged inside, which can accelerate the growth of bone tissue. The inside of the interface screw body 1 A first through hole 5 is provided, and the first through hole 5 is in a cone shape, and the area of ​​its cross section gradually decreases along the drilling direction of the interface screw body 1. Through the setting of the first through hole 5, it can be ensured that the front end of the interface screw body 1 has a reliable wall thickness, thereby improving the overall strength of the interface screw body 1. A reinforcing rib 6 is fixedly installed inside the first through hole 5, and the number of the reinforcing ribs 6 is three groups, thereby improving the stress strength of the interface screw body 1. A screw tip 7 is provided at one end of the interface screw body 1, and a second through hole 8 is provided inside the screw tip 7, and the second through hole 8 is connected to the first through hole 5. Through the setting of the second through hole 8, bone crushing The bone chips can enter the first through hole 5 through the second through hole 8 to reduce the amount of bone chips between the screw tip 7 and the inner wall of the medullary canal, and reduce the squeezing of the medullary canal during the implantation of the interface screw body 1. A screw head 9 is provided at the other end of the interface screw body 1. A driving hole 10 is provided inside the screw head 9, and the driving hole 10 is set to a regular polygon. Through the setting of the driving hole 10, it is convenient to drive the interface screw body 1 to rotate with the help of an external tool, so that the interface screw body 1 can be quickly implanted. The arc-shaped design of the screw tip 7 reduces the irritation and damage to the soft tissue after the interface screw body 1 is implanted. The second through hole 8 is provided so that bone debris can enter the first through hole 5 through the second through hole 8, so as to reduce the amount of bone debris between the screw tip 7 and the inner wall of the medullary canal, and reduce the squeezing of the medullary canal during the implantation of the interface screw body 1. By providing a functional drug inside the filling hole 4, the growth of bone tissue can be accelerated. With the absorption of the functional drug, the filling hole 4 becomes empty, and the bone tissue continues to grow and embed into the perforation 3 and the filling hole 4, generating a binding force, which can limit the rotation, forward and backward movement and sliding of the interface screw body 1, making it difficult for the interface screw body 1 to fall off, thereby solving the problem of postoperative loosening.

[0021] During use: first fill the filling hole 4 with functional drugs, then screw the interface screw body 1 into the medullary canal, the screw tip 7 adopts an arc-shaped design to reduce the irritation and damage to the soft tissue after the interface screw body 1 is implanted, and through the setting of the second through hole 8, bone debris can enter the first through hole 5 from the second through hole 8 to reduce the amount of bone debris between the screw tip 7 and the inner wall of the medullary canal, and reduce the squeezing of the medullary canal during the implantation of the interface screw body 1, and through the setting of the filling hole 4, functional drugs are arranged inside, wherein the functional drugs can be drugs for tissue anti-inflammatory, or drugs that are beneficial to tissue growth and recovery, after the interface screw body 1 is implanted, the functional drugs are continuously released and quickly absorbed by the bone tissue, which is beneficial to the growth of the bone tissue, with the absorption of the functional drugs, the filling hole 4 becomes empty, the bone tissue continues to grow and embed into the perforation 3 and the filling hole 4, generating a binding force, which can limit the rotation, forward and backward movement and sliding of the interface screw body 1, making it difficult for the interface screw body 1 to fall off, solving the problem of easy postoperative loosening.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silk protein interface screw, comprising an interface screw body (1), characterized in that: The surface of the interface screw body (1) is provided with an external threaded body (2), the interior of the external threaded body (2) is provided with a through hole (3), the surface of the interface screw body (1) is provided with a filling hole (4), the interior of the interface screw body (1) is provided with a first through hole (5), one end of the interface screw body (1) is provided with a screw tip (7), and the other end of the interface screw body (1) is provided with a screw head (9).

2. A silk protein interface screw according to claim 1, characterized in that: The number of the perforations (3) is multiple and they are arranged in a circular array.

3. The silk protein interface screw according to claim 1, characterized in that: The number of the filling holes (4) is multiple, and the filling holes (4) are located on the bottom surface of the through hole (3).

4. The silk protein interface screw according to claim 1, characterized in that: The first through hole (5) is in a cone shape, and the area of ​​its cross section gradually decreases along the drilling direction of the interface screw body (1).

5. The silk protein interface screw according to claim 1, characterized in that: Reinforcing ribs (6) are fixedly installed inside the first through hole (5), and the number of the reinforcing ribs (6) is three groups.

6. The silk protein interface screw according to claim 1, characterized in that: A second through hole (8) is provided inside the screw tip (7), and the second through hole (8) is connected to the first through hole (5).

7. The silk protein interface screw according to claim 1, characterized in that: A driving hole (10) is provided inside the screw head (9), and the driving hole (10) is arranged in the shape of a regular polygon.

Images