CN210811451U

CN210811451U - Degradable magnesium alloy bone fixing screw

Info

Publication number: CN210811451U
Application number: CN201921565473.0U
Authority: CN
Inventors: 杨健
Original assignee: Suzhou Meixindis Medical Technology Co ltd
Current assignee: Suzhou Meixindis Medical Technology Co ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-06-23
Anticipated expiration: 2029-09-20

Abstract

The utility model discloses a degradable magnesium alloy bone set screw, including the screwhead, the top central point of screwhead puts and has seted up the interior hexagonal recess, the cross flower recess has been seted up to the inner chamber bottom central point of interior hexagonal recess, first screw rod is installed to the bottom of screwhead, the outer wall circumference of first screw rod is provided with first screw thread section. This degradable magnesium alloy bone set screw can degrade in the human body and absorb, compare with the screw that traditional stainless steel or titanium alloy made, after the postoperative is recovered, need not the secondary operation and take out it, not only saved the process of getting the nail, more importantly has avoided the secondary operation to bring the misery for the patient, and, two segmentation designs and pitch diverse, can make whole more stable when connecting fixedly, can not take place to become flexible, the phenomenon that drops, therefore, the clothes hanger is strong in practicability, satisfy the user demand on the existing market, and is suitable for popularization.

Description

Degradable magnesium alloy bone fixing screw

Technical Field

The utility model relates to the technical field of medical equipment, specifically a degradable magnesium alloy bone set screw.

Background

In the orthopedic grafting, correcting or ligament reconstruction surgery, the fixation is often performed by using an interface screw, however, the fracture internal fixation screw currently used for clinical treatment is generally made of stainless steel or titanium alloy, because the traditional metal bone nail can not be degraded in the organism, after the bone tissue is healed, the doctor needs to carry out a secondary operation to take out the bone tissue, the operation process is troublesome, and the patient also needs to suffer from the pain of the operation again, in addition, the prior fixing screw has poor fixing strength, so that the screw is easy to loosen and fall off when a patient moves after an operation, brings unnecessary troubles to medical staff and the patient, has poor practicability, cannot meet the use requirements in the prior market, therefore, based on the defects, a degradable magnesium alloy bone fixing screw is proposed to improve the defects.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a degradable magnesium alloy bone set screw to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the degradable magnesium alloy bone fixing screw comprises a screw head, wherein an inner hexagonal groove is formed in the center of the top end of the screw head, a cross-shaped groove is formed in the center of the bottom end of the inner cavity of the inner hexagonal groove, a first screw rod is installed at the bottom end of the screw head, a first thread section is arranged on the circumference of the outer wall of the first screw rod, a second screw rod is installed at the bottom end of the first screw rod, and a second thread section is arranged on the circumference of the outer wall of the second screw rod.

Preferably, the screw head, the first screw rod, the first threaded section, the second screw rod and the second threaded section are all made of magnesium alloy materials.

Preferably, the depth of the grooves of the cross flowers is 0.3 cm.

Preferably, the thread pitch between the first thread segments and the second thread segments is different.

Preferably, the joint between the first screw rod and the second screw rod is an arc surface.

Compared with the prior art, the beneficial effects of the utility model are that: the degradable magnesium alloy bone fixing screw can be degraded and absorbed in a human body because the whole body is made of magnesium alloy, and the degradable magnesium alloy bone fixing screw does not need to be taken out after being recovered, so that the patient is prevented from suffering the pain caused by taking out the screw in an operation again; because first screw rod and second screw rod divide into two sections and the screw pitch diverse between the first screw thread section on its outer wall and the second screw thread section, make whole can be more stable carry out fixed connection, the device can degrade in the human body and absorb, compare with the screw that traditional stainless steel or titanium alloy made, after the postoperative is recovered, need not the secondary operation and take out it, the process of getting the nail has not only been saved, more importantly avoided the secondary operation to bring the misery for the patient, and, two sections designs and screw pitch diverse, can make whole when connecting fixedly more stable, can not take place to become flexible, the phenomenon that drops, therefore, the clothes hanger is strong in practicability, satisfy the user demand on the existing market, and is suitable for popularization.

Drawings

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

FIG. 2 is a schematic view of the explosion structure of the present invention;

fig. 3 is a schematic view of the cross-shaped groove overlooking structure of the present invention.

In the figure: 1. the screw head, 2, the inner hexagonal groove, 3, the cross-shaped groove, 4, the first screw rod, 5, the first thread section, 6, the second screw rod, 7 and the second thread section.

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. 1-3, the present invention provides a technical solution: the utility model provides a degradable magnesium alloy bone set screw, including screwhead 1, hexagon socket head 2 has been seted up to screwhead 1's top central point, cross flower recess 3 has been seted up to hexagon socket head 2's inner chamber bottom central point, can increase rather than the application scope who uses external equipment in cooperation through hexagon socket head 2 and cross flower recess 3, the limitation is little, first screw rod 4 is installed to screwhead 1's bottom, first screw rod 4's outer wall circumference is provided with first screw thread section 5, second screw rod 6 is installed to first screw rod 4's bottom, second screw rod 6's outer wall circumference is provided with second screw thread section 7, two segmentation designs and the screw pitch between first screw thread section 5 and the second screw thread section 7 is different, thereby can be that it is whole when connecting the solid more stable.

Preferably, the screw head 1, the first screw rod 4, the first threaded section 5, the second screw rod 6 and the second threaded section 7 are made of magnesium alloy, and magnesium alloy can be degraded and absorbed in vivo without being taken out through an operation.

Preferably, the depth of the cross-shaped groove 3 is 0.3cm, so that the whole body can be better fixed in a rotating mode by using external equipment.

Preferably, the thread pitch between the first thread segments 5 and the second thread segments 7 is different, and the different thread pitches make it possible to fix the whole in a more stable manner when the screw is fixed in rotation.

Preferably, the joint between the first screw rod 4 and the second screw rod 6 is a circular arc surface, so that unnecessary damage to external bone tissue due to edges and corners is avoided.

The detailed connection means is a technique known in the art, and the following mainly describes the working principle and process, and the specific operation is as follows.

When the device is used, external equipment, namely an inner hexagonal plate or a cross screwdriver can be used in cooperation with the device, the application range is enlarged, the limitation is small, and the device is made of magnesium alloy, so that magnesium is an essential element of a human body and has good biocompatibility; excellent biological activity, and can promote fracture healing; the mechanical property of the bone tissue is more approximate; unique in vivo degradation performance; density closer to bone; raw and other materials advantage with low costs, the set screw made by magnesium alloy can be degraded in the human body and absorbed, need not to take out it through the operation once more, two segmentation designs and the first screw thread section 5 is different with the screw pitch between the second screw thread section 7 to can be that it is whole when connecting fixedly more stable, the device has saved the process of getting the nail, avoid the secondary operation to take out the screw and bring the misery for the patient, and, stability is good, can not take place not hard up, the phenomenon that drops, therefore, the clothes hanger is strong in practicability.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "central position", "other end", "upper", "one side", "top", "inner", "front", "central", "two ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated; also, unless expressly stated or limited otherwise, the terms "snap" and "weld" and "attach" and "set" are intended to be inclusive and mean, for example, a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

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 degradable magnesium alloy bone fixing screw comprises a screw head (1) and is characterized in that: interior hexagonal recess (2) have been seted up to the top central point of screwhead (1), cross flower recess (3) have been seted up to the inner chamber bottom central point of interior hexagonal recess (2) position, first screw rod (4) are installed to the bottom of screwhead (1), the outer wall circumference of first screw rod (4) is provided with first screw thread section (5), second screw rod (6) are installed to the bottom of first screw rod (4), the outer wall circumference of second screw rod (6) is provided with second screw thread section (7).

2. The degradable magnesium alloy bone fixation screw of claim 1, which is characterized in that: the screw head (1), the first screw rod (4), the first threaded section (5), the second screw rod (6) and the second threaded section (7) are all made of magnesium alloy materials.

3. The degradable magnesium alloy bone fixation screw of claim 1, which is characterized in that: the depth of the cross flower groove (3) is 0.3 cm.

4. The degradable magnesium alloy bone fixation screw of claim 1, which is characterized in that: the thread pitch between the first thread section (5) and the second thread section (7) is different.

5. The degradable magnesium alloy bone fixation screw of claim 1, which is characterized in that: the joint between the first screw rod (4) and the second screw rod (6) is an arc surface.