CN211962165U

CN211962165U - Outer fixing plate for femoral neck fracture

Info

Publication number: CN211962165U
Application number: CN202020170676.6U
Authority: CN
Inventors: 赵德伟; 马志杰; 刘保一; 吴斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2020-11-20
Anticipated expiration: 2030-02-14

Abstract

The utility model provides an outside fixed plate is used in femoral neck fracture, a serial communication port, the fixed plate includes: an arc-shaped bottom plate with a profiling structure at the lower part of the greater trochanter of the femur of a human body; a rectangular screw hole for fixing the tail part of the porous tantalum metal screw is arranged in the middle of the arc-shaped bottom plate; a first circular screw hole used for being matched with a first screw to assist in fixing is formed in the near end of the arc-shaped bottom plate; the arc-shaped bottom plate below the rectangular screw is provided with a second circular screw which is matched with a second screw for auxiliary fixation, the far end of the arc-shaped bottom plate is provided with a third circular screw which is matched with a third screw for auxiliary fixation, and the screws are sequentially arranged along the central line of the arc-shaped bottom plate. The utility model discloses a supplementary fixed hone lamella of single piece of porous tantalum metal screw fixed femoral neck fracture when protecting femoral head blood circulation, can firmly fix femoral neck fracture through cooperation between outside fixed plate and each screw, prevents the displacement of fracture, and the effect is showing.

Description

Outer fixing plate for femoral neck fracture

Technical Field

The utility model relates to a medical supplies technical field particularly, especially relates to a combination screw treatment femoral neck fracture's auxiliary fixed plate, an outside fixed plate is used in femoral neck fracture promptly.

Background

Femoral neck fracture is a common trauma in clinic, and in china, it is reported by zhangying et al that femoral neck fracture accounts for 51.97% of proximal femur fracture. With the aging of social population and the development of traffic and construction industry, the incidence of femoral neck fractures increases year by year, and the rare femoral neck fractures in the past are gradually increased in recent years. The most serious complication of femoral neck fracture in clinical treatment is avascular necrosis of the femoral head, and the disability rate of the injury is high. The incidence of osteonecrosis associated with the severity of femoral neck fractures in adult patients ranges from 12% to 86%. Early accurate reduction, stable internal fixation, reduction of local blood supply destruction or improvement of blood perfusion are important factors for ensuring good prognosis of fracture. The femoral neck fracture healing needs to keep the stability and the absolute rotational stability of the fracture part on the coronal plane and the sagittal plane, so that the internal fixing device can keep the contact of the fracture end, maintain firm stability and resist daily stress, thereby ensuring the healing of the fracture, and the selection of the femoral neck fracture internal fixing device should be based on the principles of good stability and less blood circulation interference.

Currently, the most common internal fixation method is cannulated screw fixation, which is generally applicable to most femoral neck fractures. However, the position arrangement of the screw, the control of the nail feeding angle and the like still have higher technical requirements, and repeated nail penetration is avoided in the operation. Researchers report that the femoral head necrosis rate can reach 45% after the treatment by the hollow-core nail internal fixation method. Even if no displacement femoral neck fracture occurs, the postoperative femoral head necrosis rate is up to 22.5%.

However, in clinical work, the fracture line of a patient suffering from Pauwels type III femoral neck fracture is vertical, the shearing force is large, single screw fixation cannot provide angular stability, and fracture displacement is easy to occur after fixation and fracture is not healed. How to prevent femoral neck fracture from displacement after fixation becomes a problem to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

According to the technical problem that fracture displacement is easy to occur and healing is not easy to occur when single screw is used for fixing, the outer side fixing plate for femoral neck fracture is provided. The utility model discloses mainly utilize one with the arc plate structure of the big trochanter below part phase profile modeling of human thighbone as outside fixed stay, supplementary single piece of porous tantalum metal screw fixation thighbone neck fracture provides the angle stability, promotes union fracture, avoids the emergence of complications such as femoral head necrosis and fracture nonunion. Wherein, the porous tantalum metal screw that the cooperation was used is that the utility model discloses an inventor invents according to femoral head blood circulation characteristics, patent number: CN205814410U, which is used for solving the problem of high femoral head necrosis rate after the treatment of the hollow-core nail internal fixation method, the bidirectional pressurized porous tantalum metal screw can firmly fix femoral neck fracture at the central part, does not damage femoral head epiphysis arterial network, reduces the incidence rate of femoral head necrosis, can exert the excellent biocompatibility of porous tantalum metal, promotes early bone ingrowth, achieves the purpose of long-term biological fixation, and obtains better clinical application effect.

The utility model discloses a technical means as follows:

a lateral fixation plate for femoral neck fractures, the fixation plate comprising:

the arc-shaped bottom plate is provided with a profiling structure at the lower part of the greater trochanter of the femur of a human body; a rectangular screw hole for fixing the tail part of the porous tantalum metal screw is formed in the middle of the arc-shaped bottom plate; a first circular screw hole used for being matched with a first screw to assist in fixing is formed in the near end of the arc-shaped bottom plate; set up on the arc bottom plate of rectangle screw thread below be used for with the supplementary fixed circular screw thread of second screw cooperation the distal end setting of arc bottom plate is used for with the supplementary fixed third circular screw thread of third screw cooperation, first circular screw thread rectangle screw thread the circular screw thread of second with the third circular screw thread is followed the central line of arc bottom plate sets gradually.

Further, the length of arc bottom plate is 60 ~ 70mm, and the width is 20 ~ 25mm, and thickness is 3 ~ 5mm, the arc angle of arc bottom plate is 20 ~ 30.

Further, the length of the rectangular screw is 10mm, and the width of the rectangular screw is 8 mm.

Further, the diameters of the first circular screw, the second circular screw and the third circular screw are the same, and the diameter of the screw is 4.5 mm.

Further, the arc-shaped bottom plate is made of one of titanium, titanium alloy, cobalt alloy, stainless steel or tantalum metal.

Further, the arc-shaped bottom plate is made by a 3D printing mode.

Compared with the prior art, the utility model has the advantages of it is following:

the utility model discloses a lateral fixing plate that provides is the supplementary fixed hone lamella of single piece of porous tantalum metal screw fixed femoral neck fracture, when protecting femoral head blood circulation, the femoral neck fracture can firmly be fixed in the cooperation between this lateral fixing plate and each screw, prevents that the fracture from shifting, and especially to unstable Pauwels III type femoral neck fracture fixed effect more obvious. Simultaneously, the complications such as femoral head necrosis, fracture nonunion and the like are effectively avoided, and an effective fixing system is provided for the treatment of femoral neck fracture.

Based on the above reason, the utility model discloses can extensively promote in femoral neck fracture treatment field.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural view of the external fixation plate for femoral neck fracture of the present invention.

Fig. 2 is a use state diagram of the outer fixing plate for femoral neck fracture of the present invention.

In the figure: 1. an arc-shaped bottom plate; 2. a rectangular screw opening; 3. a first circular screw; 4. a second circular screw; 5. a third circular screw; 6. a fracture line; 7. porous tantalum metal screws (main screws).

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1, the utility model provides an outside fixed plate for femoral neck fracture mainly combines screw adjunctie therapy femoral neck fracture, the fixed plate includes:

the arc-shaped bottom plate 1 is provided with a profiling structure at the lower part of the greater trochanter of the femur of a human body, is made of one of titanium, titanium alloy, cobalt alloy, stainless steel or tantalum metal, and can be made in a 3D printing mode; the length of the arc-shaped bottom plate 1 is 60-70 mm, the width is 20-25 mm, the thickness is 3-5 mm, and the arc angle of the arc-shaped bottom plate 1 is 20-30 degrees. In use, this arc is seen to fit fully against the inferior facet of the greater trochanter of the femur in fig. 2. The utility model discloses a femoral neck fracture is with outside fixed plate (arc coaptation board promptly) is the bionical design that goes on according to human anatomical structure, because there is the individual difference, so arc angle of arc bottom plate 1 is at 20 ~ 30 within ranges, in the use, can slightly adjust the arc angle of arc bottom plate 1 within ranges according to different individualities.

A rectangular screw opening 2 for fixing the tail part of the porous tantalum metal screw is arranged in the middle of the arc-shaped bottom plate 1; the screw length of the rectangular screw 2 is 10mm, and the width is 8 mm.

A first circular screw port 3 which is matched with a first screw for auxiliary fixation is arranged at the near end of the arc-shaped bottom plate 1; set up on the arc bottom plate 1 of rectangle screw thread 2 below and be used for the circular screw thread 4 of second of supplementary fixed with the second screw cooperation the distal end setting of arc bottom plate 1 is used for the third circular screw thread 5 of supplementary fixed with the third screw cooperation, first circular screw thread 3 rectangle screw thread 2 the circular screw thread 4 of second with third circular screw thread 5 follows the central line of arc bottom plate 1 sets gradually.

Set up the screw socket of supplementary fixed usefulness and be the stable fixed effect in order to strengthen single piece of porous tantalum metal screw 7, because the people is stood the walking, have decurrent vertical pressure, single piece of porous tantalum metal screw 7 receives gravity and the shearing of fracture line 6 easily, leads to porous tantalum metal screw 7 distal end to bend and warp, and the fracture is shifted, and the internal fixation inefficacy is so in the outside add the utility model discloses outside fixed plate is strengthened fixedly. The screw ports for auxiliary fixation are arranged mainly for resisting the gravity of the body, so that two screw ports are arranged at the lower end, and the fixation is firm.

The diameters of the first circular screw port 3, the second circular screw port 4 and the third circular screw port 5 are the same, and the diameters of the screw ports are 4.5 mm. The round screw ports are arranged identically, and are mainly matched with screws of 4.5mm, so that the clinical operation is facilitated.

As shown in figure 2, when the femoral neck fracture fixation device is used, the outer side fixing plate assists the porous tantalum metal screw 7 to fix femoral neck fracture on the outer side of a femoral greater trochanter, the rectangular screw port 2 fixes the tail end of the porous tantalum metal screw, the first circular screw port 3 at the near end of the arc-shaped bottom plate 1, the second circular screw port 4 at the far end and the third circular screw port 5 are fixed by screws with diameters of 4.5 millimeters respectively, an angle stabilization effect is achieved, femoral neck fracture is fixed powerfully, and fracture displacement is prevented.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A lateral fixation plate for femoral neck fractures, the fixation plate comprising:

2. The external fixation plate for femoral neck fracture according to claim 1, wherein the arc-shaped bottom plate has a length of 60 to 70mm, a width of 20 to 25mm and a thickness of 3 to 5mm, and the arc-shaped angle of the arc-shaped bottom plate is 20 to 30 °.

3. A lateral fixation plate for femoral neck fractures according to claim 1, wherein the rectangular screw has a screw length of 10mm and a width of 8 mm.

4. A lateral fixation plate for femoral neck fractures according to claim 1, wherein the first circular screw, the second circular screw and the third circular screw have the same screw diameter, which is 4.5 mm.

5. The lateral fixation plate for femoral neck fractures according to claim 1, wherein the arcuate base plate is made of one of titanium, titanium alloy, cobalt alloy, stainless steel or tantalum metal.

6. An external fixation plate for femoral neck fractures according to claim 1 or 5, wherein the arc-shaped base plate is made by means of 3D printing.