High-stability anti-allergic bone screw

Abstract

The high-stability anti-allergic bone screw comprises a hollow outer screw body and a solid inner screw body, an expansion base is arranged at the bottom of the hollow outer screw body, the expansion base is cylindrical, an expansion groove is formed in the expansion base, a locking inner thread is arranged on the inner wall of the end, close to the expansion base, of the hollow outer screw body, and the inner wall of the end, close to the expansion base, of the hollow outer screw body is provided with a locking outer thread. An opening is formed in the other end of the hollow outer nail, an auxiliary connecting ring is arranged on the outer surface of the opening, an auxiliary connecting hole is formed in the auxiliary connecting ring, and a positioning screw is arranged in the auxiliary connecting hole; the bone nail has the advantages that the hollow outer nail and the solid inner nail are matched to form two-section type fixation, an expansion bolt structure is formed at the bottom through the expansion base to reinforce the stability of human bones, and the auxiliary connection ring and the positioning screw are matched on the surface of the bone nail for auxiliary reinforcement; the overall stability and firmness of the bone nail after bone setting are improved, and displacement and loosening of the bone nail are avoided.

Description

Technical Field

[0001] The utility model relates to the field of orthopedic implants, in particular to a highly stable anti-allergic bone screw. Background Art

[0002] A bone screw is a medical device that is often used in the treatment of fractures. It is a metal screw that is surgically implanted into the fracture site to fix the broken bone. Bone screws provide stability to help the bone heal, and they usually do not need to be removed after healing is complete because they can be left in the body. This can reduce the risk of reoperation and recovery time after surgery. The design and size of bone screws will vary depending on the patient's specific situation and the type of fracture.

[0003] Bone screws are implanted into human bones with the cooperation of bone plates. Similar to traditional screws, they are fixed in the bones by screwing in after pre-drilling holes in the human bones. However, bone screws are not completely fixed. After the bone setting operation is completed, the bone screws often fail to effectively maintain the stability of the fracture site, resulting in fracture displacement and improper healing. The reason is that the bone screws do not fit well after entering the bone, resulting in loosening. At the same time, because the bone screws remain in the bones, some patients will have an allergic reaction to the bone screws after contact with the human body, resulting in local inflammation and adverse reactions. Traditional bone screws are made of stainless steel or titanium alloy, the metal trace elements in stainless steel will have an impact on the human body, and the cost of full titanium alloy is relatively expensive, so the medical expenses of fracture patients are also high. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] The technical problem to be solved by the utility model is that bone screws are not completely fixed. After the bone setting operation is completed, the bone screws are often unable to effectively maintain the stability of the fracture site, resulting in fracture displacement and improper healing. In addition, the bone screws currently on the market are made of metal. After contact with the human body, some patients will have an allergic reaction to the bone screws, resulting in local inflammation and adverse reactions, and the patient's medical costs are also high.

[0006] (II) Technical solution

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] A highly stable and anti-allergic bone screw comprises a hollow outer nail and a solid inner nail, wherein an expansion base is provided at the bottom of the hollow outer nail, the expansion base is cylindrical, an expansion groove is provided on the expansion base, a locking inner thread is provided on the inner wall of one end of the hollow outer nail close to the expansion base, an opening is provided at the other end of the hollow outer nail, an auxiliary connection ring is provided on the outer surface of the opening, an auxiliary connection hole is provided on the auxiliary connection ring, a positioning screw is provided in the auxiliary connection hole, the solid inner nail is inserted into the hollow outer nail, a locking outer thread is provided on one end of the solid inner nail, and a nut end is provided at the other end of the solid inner nail.

[0009] Furthermore, the expansion base is made of plastic material and is fixedly connected to the hollow outer nail. The diameter of the expansion base is smaller than the diameter of the hollow outer nail, and the junction between the expansion base and the hollow outer nail is an arc surface.

[0010] Furthermore, the outer wall of the hollow outer nail is provided with a thread, the outer wall of the opening is a circular wall, and the inner wall of the opening is a hexagonal shape.

[0011] Furthermore, the auxiliary ring and the nut end are made of titanium alloy, and the hollow outer nail and the solid inner nail are made of stainless steel.

[0012] Furthermore, the nut end is in a cap shape, and a protective cover is provided on the outer side of the nut end.

[0013] (III) Beneficial effects

[0014] The beneficial effects of the utility model are:

[0015] A two-stage fixation is formed by the cooperation of a hollow outer nail and a solid inner nail, and an expansion base is formed at the bottom to form an expansion bolt structure to strengthen the stability with the human skeleton. The surface of the bone nail is reinforced by the cooperation of an auxiliary ring and a positioning screw, so that the overall stability and firmness of the bone nail are improved after bone setting, and no displacement or loosening of the bone nail will occur. At the same time, the whole bone nail is made of stainless steel to reduce medical costs and save patients' expenses. The part in contact with human skin is separated by titanium alloy material to prevent body fluids from corroding stainless steel and causing human allergies, thereby causing inflammation and adverse reactions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 An exploded view of the utility model;

[0018] Figure 3 A side view of the utility model;

[0019] Figure 4 It is the AA section view;

[0020] Markings in the figure: 1-hollow outer nail, 2-solid inner nail, 3-expansion base, 4-auxiliary ring, 5-positioning screw, 1a-locking internal thread, 1b-opening, 2a locking external thread, 2b-nut end, 2c-protective cover, 3a-expansion slot, 4a-auxiliary hole. DETAILED DESCRIPTION

[0021] 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.

[0022] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] See also Figure 1-4 A high-stable anti-allergic bone screw is shown, comprising a hollow outer nail 1 and a solid inner nail 2. An expansion base 3 is provided at the bottom of the hollow outer nail 1. The expansion base 3 is cylindrical and has an expansion groove 2a. A locking inner thread 1a is provided on the inner wall of one end of the hollow outer nail 1 close to the expansion base 3. An opening 1b is provided at the other end of the hollow outer nail 1. An auxiliary connection ring 4 is provided on the outer surface of the opening 1b. An auxiliary connection hole 4a is provided on the auxiliary connection ring 4. A positioning screw 5 is provided in the auxiliary connection hole 4a. The solid inner nail 2 is inserted into the hollow outer nail 1. A locking outer thread 2a is provided at one end of the solid inner nail 2. The other end of the solid inner nail 2 is a nut end 2b.

[0024] The expansion base 3 is made of plastic and is fixedly connected to the hollow external nail 1. The diameter of the expansion base 3 is smaller than the diameter of the hollow external nail 1. The junction between the expansion base 3 and the hollow external nail 1 is an arc surface. The expansion base 3 has a similar function to the expansion bolt. When the solid internal nail 2 is inserted, the solid internal nail 2 is introduced through the arc surface, and the expansion base 3 is expanded and fixed to the bone by screwing in the screws.

[0025] The outer wall of the hollow outer nail 1 is provided with threads, the opening 1b is a circular outer wall, the inner wall of the opening 1b is a hexagonal shape, and the opening 1b is a reserved hexagonal bolt insertion port, which is screwed in by inserting the hexagonal bolt.

[0026] The auxiliary ring 4 and the nut end 2b are made of titanium alloy, and the hollow outer nail 1 and the solid inner nail 2 are made of stainless steel.

[0027] The nut end 2b is in a cap shape, and a protective cover 2c is provided on the outside of the nut end 2b. When the solid inner nail 2 enters the hollow outer nail 1, the protective cover 2c covers the surface of the opening 1b to isolate the opening 1b from contact with human tissue.

[0028] The specific working principle is: when in use, after positioning with a Kirschner wire and pre-grooving the bone, insert the hollow external nail 1, the opening 1b of the hollow external nail 1 is hexagonal, that is, the reserved hexagonal bolt tightening part, the hollow external nail 1 is implanted into the bone through the hexagonal bolt, and the friction is increased and blocked through the thread on the surface of the hollow external nail 1, and then the positioning screw 5 is passed through the auxiliary ring 4 and punched to form an auxiliary fixation, the next step is to insert the solid internal nail 2 into the hollow external nail 1, and the solid internal nail is screwed into the hollow external nail 1 through the nut end 2b. During the process, the solid internal nail 2 is locked with the hollow external nail 1 through the locking external thread 2a, and one end of the solid internal nail 2 enters the expansion base 3 and stretches the expansion base 3, and the expansion base 3 further expands to contact with the bone to increase the friction area for fixation, and the nut end 2b wraps the opening 1b for isolation.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A highly stable anti-allergic bone screw, characterized in that: The invention comprises a hollow outer nail (1) and a solid inner nail (2). The bottom of the hollow outer nail (1) is provided with an expansion base (3). The expansion base (3) is cylindrical and has an expansion groove (3a). The inner wall of one end of the hollow outer nail (1) close to the expansion base (3) is provided with a locking inner thread (1a). The other end of the hollow outer nail (1) is provided with an opening (1b). The outer surface of the opening (1b) is provided with an auxiliary connection ring (4). The auxiliary connection ring (4) is provided with an auxiliary connection hole (4a). A positioning screw (5) is provided in the auxiliary connection hole (4a). The solid inner nail (2) is inserted into the hollow outer nail (1). One end of the solid inner nail (2) is provided with a locking outer thread (2a). The other end of the solid inner nail (2) is a nut end (2b).

2. A highly stable anti-allergic bone screw according to claim 1, characterized in that: The expansion base (3) is made of plastic and is fixedly connected to the hollow outer nail (1). The diameter of the expansion base (3) is smaller than the diameter of the hollow outer nail (1), and the junction between the expansion base (3) and the hollow outer nail (1) is an arc surface.

3. The high-stability anti-allergic bone screw according to claim 1, characterized in that: The outer wall of the hollow outer nail (1) is provided with threads, the outer wall of the opening (1b) is a circular wall, and the inner wall of the opening (1b) is a hexagonal wall.

4. A highly stable anti-allergic bone screw according to claim 3, characterized in that: The auxiliary ring (4) and the nut end (2b) are made of titanium alloy, and the hollow outer nail (1) and the solid inner nail (2) are made of stainless steel.

5. The high-stability anti-allergic bone screw according to claim 1, characterized in that: The nut end (2b) is in a cap shape, and a protective cover (2c) is provided on the outside of the nut end (2b).

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