Fracture locking steel plate capable of achieving continuous pressurization

Abstract

The utility model discloses a fracture locking steel plate capable of realizing continuous pressurization, which comprises a steel plate body, the steel plate body is provided with a first hole and a second hole, the first hole is an elliptical hole, the inner wall of the first hole is provided with a semicircular pressurization groove, and the pressurization groove is provided with two end parts; the memory metal wire is arranged in the pressurizing groove, and the two ends of the memory metal wire are fixedly connected with the two ends of the pressurizing groove respectively. The side face of the screw is driven through continuous contraction of the memory metal wire, tensioning of two fracture blocks is achieved, the problem that pressurization disappears after fracture absorption is generated is solved, the fracture broken end of a patient can be pressurized for a longer time, and a better treatment effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fracture locking steel plates, in particular to a fracture locking steel plate capable of achieving continuous pressure application. Background Art

[0002] See also Figure 1 , Figure 2 As shown, an existing locking steel plate is shown, which guides the screw through the guide protrusion arranged obliquely on the inner wall of the steel plate hole, and the lower edge of the screw cap of the screw is arranged in an arc shape. As the screw is tightened, through the cooperation of the arc shape and the guide protrusion, the lower edge of the screw cap squeezes the inclined surface of the guide protrusion, and the vertical axial movement of the screw is converted into the horizontal movement of the steel plate through the inclined surface. Because the other end of the steel plate fixes another fracture fragment through another screw, the steel plate drives the two fracture fragments to close, thereby achieving fracture compression.

[0003] The locking plate mentioned above can achieve compression to a certain extent, but human bones are living biological tissues, not inorganic substances such as metal ceramics. The fracture ends will have varying degrees of bone absorption within a certain period of time after the operation, that is, bone loss may occur due to a series of reasons such as inflammation. This loss will make the compression effect of the compression plate on the fracture ends disappear. The longer the compression time exists, the more beneficial it is for the patient's fracture healing.

[0004] Therefore, there is an urgent need to provide a fracture locking plate that can achieve continuous compression for a long time. Utility Model Content

[0005] The utility model provides a fracture locking steel plate which can realize continuous pressurization.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A fracture locking steel plate capable of achieving continuous pressurization, comprising a steel plate body, the steel plate body being provided with a first hole and a second hole, wherein the first hole is an elliptical hole, the inner wall of the first hole being provided with a semi-circular pressurization groove, and the pressurization groove having two ends;

[0008] It also includes a memory metal wire, which is arranged inside the pressurizing groove, and two ends of the memory metal wire are respectively fixedly connected to two ends of the pressurizing groove.

[0009] The above-mentioned fracture locking steel plate capable of achieving continuous pressurization, wherein the pressurization groove is located in the middle of the steel plate body in the thickness direction.

[0010] The above-mentioned fracture locking steel plate capable of achieving continuous pressurization, wherein the inner wall of the first hole is an annular inner wall, three quarters of the inner wall of the first hole is provided with the pressurization groove inwardly, and the other quarter of the inner wall of the first hole is a flat surface.

[0011] The above-mentioned fracture locking steel plate capable of achieving continuous pressurization, wherein the major axis direction of the elliptical hole is the same as the extension direction of the steel plate body.

[0012] The above-mentioned fracture locking steel plate capable of achieving continuous pressurization, wherein the flat surface is located at one end of the elliptical hole in the long axis direction.

[0013] The above-mentioned fracture locking steel plate capable of achieving continuous compression, wherein a screw-in area is formed within the semi-annular range formed by the memory metal wire.

[0014] The above-mentioned fracture locking steel plate capable of achieving continuous compression comprises a plurality of the second holes.

[0015] The above-mentioned fracture locking steel plate capable of achieving continuous compression, wherein the second hole is a round hole.

[0016] The above-mentioned fracture locking steel plate capable of achieving continuous compression, wherein the memory metal wire is configured to extend in length at high temperature and shorten in length at human body temperature.

[0017] Due to the adoption of the above technology, the utility model has the following positive effects compared with the prior art:

[0018] (1) The utility model realizes the tightening of the two fracture fragments by driving the side of the screw through the continuous contraction of the memory metal wire, thereby solving the problem of the disappearance of the pressure after the fracture absorption occurs, so that the fracture ends of the patient can be pressurized for a longer time, thereby obtaining a better treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the prior art.

[0020] Figure 2 It is a schematic diagram of the prior art.

[0021] Figure 3 This is a schematic diagram of the fracture locking steel plate capable of achieving continuous compression according to the present invention.

[0022] Figure 4 The utility model is a fracture locking steel plate capable of realizing continuous compression Figure 3 A partial enlarged schematic diagram of .

[0023] Figure 5 , Figure 6This is a schematic diagram of a top view of a fracture locking steel plate capable of achieving continuous compression according to the present invention.

[0024] The symbols in the drawings of the specification include:

[0025] 1. Steel plate body; 2. First hole; 3. Second hole; 4. Pressurized groove; 5. Memory metal wire; A. End; B. End; C. Bone block; D. Bone block. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0027] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside”, “front”, “back”, “lateral” and “vertical” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device or component referred to must have a specific direction and therefore should not be understood as a limitation on the present invention.

[0028] It should be specially explained that the terms “horizontal” and “vertical” in the present invention are used to illustrate a rough positional relationship, rather than a strict “horizontal plane” or “vertical plane”.

[0029] See also Figures 3 to 6 As shown, a preferred embodiment of a fracture locking steel plate capable of achieving continuous pressurization is shown, comprising a steel plate body 1, on which a first hole 2 and a second hole 3 are provided, wherein the first hole 2 is an elliptical hole, and an inner wall of the first hole 2 is provided with a semi-annular pressurization groove 4, and the pressurization groove 4 has two ends, namely end A and end B.

[0030] The screw can be displaced to a certain extent in the first hole 2 , while not being displaced in the second hole 3 .

[0031] Furthermore, as a preferred embodiment, it also includes a memory metal wire 5, which is arranged inside the pressurizing groove 4, and the two ends of the memory metal wire 5 are fixedly connected to the end A and the end B of the pressurizing groove 4 respectively.

[0032] Preferably, the two ends of the memory metal wire 5 are respectively welded to the end A and the end B of the pressurizing groove 4. In other embodiments, the two ends of the memory metal wire 5 can also be fixedly connected to the end A and the end B by buckles.

[0033] Specifically, a first screw passes through the first hole 2 and is fixed to the bone block C, and a second screw passes through the second hole 3 and is fixed to the bone block D, wherein no relative movement occurs between the steel plate body 1 and the bone block D. When the memory metal wire 5 contracts, its side surface provides a continuous pulling force to the first screw, so that the first screw and the bone block C are displaced relative to the steel plate body 1, thereby bringing the bone block C and the bone block D closer to achieve continuous pressure between the two.

[0034] Further, as a preferred embodiment, the pressurizing groove 4 is located in the middle of the steel plate body 1 in the thickness direction.

[0035] Furthermore, as a preferred embodiment, the inner wall of the first hole 2 is an annular inner wall, three quarters of the inner wall of the first hole 2 is provided with a pressure groove 4 inwardly, and the other quarter of the inner wall of the first hole 2 is a flat surface.

[0036] Furthermore, as a preferred embodiment, the major axis direction of the elliptical hole is the same as the extension direction of the steel plate body 1 .

[0037] Further, as a preferred embodiment, the flat surface is located at one end of the elliptical hole in the long axis direction.

[0038] Further, as a preferred embodiment, a screw-in area is formed within the semi-annular range formed by the memory metal wire 5 .

[0039] Further, as a preferred embodiment, a plurality of second holes 3 are included.

[0040] Further, as a preferred embodiment, the second hole 3 is a circular hole.

[0041] Further, as a preferred embodiment, the memory metal wire 5 is configured to extend in length at high temperature and shorten in length at human body temperature.

[0042] Specifically, the memory metal wire 5 is configured to be embedded in the pressurized groove 4 at high temperature, and its two ends are fixed to the two ends of the pressurized groove 4 at human body temperature, and the remaining part is separated from the pressurized groove 4.

[0043] Specifically, after the memory metal wire 5 is shortened at human body temperature, the size of the screw insertion area is reduced, and the memory metal wire 5 continuously provides tension to the side of the screw, forcing the steel plate body 1 to move relative to the screw, thereby achieving continuous pressurization.

[0044] Specifically, the prior art can apply pressure to the fracture ends for a short time after the operation is completed, but once bone absorption occurs, the pressure generated by the fracture ends squeezing each other will disappear. The present invention uses the memory metal wire 5 to eliminate the pressure generated by absorption within a certain range, so that the fracture ends are always pressurized.

[0045] More specifically, the displacement of the steel plate in the prior art is provided by an inclined plane, and its maximum displacement is the length of the inclined plane. The angle design of the inclined plane is limited by the friction between the screw and the steel plate and the thickness of the steel plate, and it cannot provide a very long inclined plane, so the steel plate cannot be displaced over a long distance, so after bone absorption occurs, its pressure will disappear. The deformation of the memory metal wire 5 is relatively large at high temperature and human body temperature, so it can provide a longer displacement. On the other hand, the deformation of the memory metal wire 5 is formed due to the contraction characteristics of the memory metal, so it can provide long-term and continuous pressure.

[0046] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A fracture locking plate capable of achieving continuous compression, characterized in that: It comprises a steel plate body, the steel plate body is provided with a first hole and a second hole, wherein the first hole is an elliptical hole, the inner wall of the first hole is provided with a semi-annular pressure groove, and the pressure groove has two ends; It also includes a memory metal wire, which is arranged inside the pressurizing groove, and two ends of the memory metal wire are respectively fixedly connected to two ends of the pressurizing groove.

2. The fracture locking steel plate capable of achieving continuous compression according to claim 1, characterized in that: The pressurizing groove is located in the middle of the steel plate body in the thickness direction.

3. The fracture locking steel plate capable of achieving continuous compression according to claim 1, characterized in that: The inner wall of the first hole is an annular inner wall, three quarters of the inner wall of the first hole is provided with the pressurizing groove inwardly, and the other quarter of the inner wall of the first hole is a flat surface.

4. The fracture locking steel plate capable of achieving continuous compression according to claim 3, characterized in that: The major axis direction of the elliptical hole is the same as the extending direction of the steel plate body.

5. The fracture locking steel plate capable of achieving continuous compression according to claim 4, characterized in that: The flat surface is located at one end of the elliptical hole in the long axis direction.

6. The fracture locking steel plate capable of achieving continuous compression according to claim 1, characterized in that: The semi-annular range formed by the memory metal wire forms a screw-in area.

7. The fracture locking steel plate capable of achieving continuous compression according to claim 1, characterized in that: A plurality of said second holes are included.

8. The fracture locking steel plate capable of achieving continuous compression according to claim 1, characterized in that: The second hole is a circular hole.

9. The fracture locking steel plate capable of achieving continuous compression according to claim 1, characterized in that: The memory metal wire is configured to extend in length at high temperature and shorten in length at human body temperature.

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