CN215937620U

CN215937620U - Hook steel plate internal fixing system for patellar fracture

Info

Publication number: CN215937620U
Application number: CN202120832664.XU
Authority: CN
Inventors: 孙明林
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-03-04
Anticipated expiration: 2031-04-22

Abstract

The utility model relates to the technical field of medical instruments, in particular to a hook steel plate internal fixing system for patellar fracture. The hook claw is arranged on one side of the fixing plate, and the screw is arranged in the screw hole of the fixing plate. Solves the problems of incomplete surgical indication, infirm fixation, complex operation and many complications in the prior art. The system is used for all types of patellar fractures, particularly comminuted fractures and patellar superior and inferior fractures with small fracture blocks or avulsion fractures, and can firmly fix broken fragments of the patella through the combination of a plurality of fixing plates with different lengths in different directions. The inner surface of the fixing plate is a curved surface and can be well jointed with the surface of the patella, the screw fixation not only provides longitudinal pressure for the fracture broken end, but also can apply vertical pressure to the surface of the steel plate to the surface of the patella through the screw, so that the steel plate is tightly jointed with the patella. The operation is simple and easy to implement, and specific fixing modes can be designed on site according to different fracture conditions of different patients in the operation, so that personalized operation is realized.

Description

Hook steel plate internal fixing system for patellar fracture

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a hook steel plate internal fixing system for patellar fracture.

Background

Patellar fractures are a common injury in the clinic and their incidence is still increasing year by year. According to the form of the fracture line, the fracture line can be divided into patella comminuted fracture, patella inferior or superior fracture, transverse fracture, longitudinal fracture, etc. Since the knee extension device suffers severe damage after fracture, most patellar fractures require surgical treatment. The basic requirements of the surgery are to reposition the comminuted fracture piece, restore the flatness of the patellar articular surface, give strong internal fixation to ensure the healing of the fracture and create mechanical conditions for early mobilization and functional exercise. The internal fixator applied clinically at present comprises a Kirschner wire tension band, a memory alloy patella claw, a multipurpose locking steel plate and the like. However, in practical applications, there are still disadvantages and drawbacks.

The kirschner wire tension band fixation is the most traditional method, the operation is complex, for the most common clinical patellar lower pole fracture, because the fracture block is small, the difficult problem that the steel wire cannot be penetrated by enough volume, the effective fixation is difficult even if the steel wire is penetrated by a narrow force often occurs, and the kirschner wire fixation is performed in insufficient space. In addition, many patients often have complications such as steel wire loosening or breaking, kirschner wire slipping and even skin penetrating after the kirschner wire tension belt is fixed, and all these complications are easy to cause fracture block displacement, fracture deformity healing and even needing re-operation.

The patella claw comprises the modes of memory alloy one-step forming, common titanium alloy combination, patella hook and patella ring combination and the like. Although there are several sizes that can be selected intraoperatively, it is often difficult to find a true fit size during surgery due to individualization differences, especially in the case of bone fragments of different shapes for each patient. Since the hook direction of the patella claw is mostly fixed, the patella claw cannot be effectively fixed for smaller fracture blocks or fracture blocks which are not in the hook direction. Another drawback of the patella claw is that there is no pressurization, and after the claw part is shrunk and fixed, the body of the patella claw and the surface of the patella are easily separated, and this hollow phenomenon can cause the fixed patella claw to easily fall off and be higher than the surface of the patella to form a bulge under the skin, thereby affecting wound healing and early functional training of the patient after surgery.

The multipurpose locking steel plate is a patella internal fixation system which has just emerged in recent years. Overcomes most defects of the previous patella internal fixing system, can pressurize the patella in the longitudinal and vertical directions, has reliable fixing effect and is beneficial to early movement of patients. The disadvantage is that the steel plate is in a prefabricated shape, so the position of the fixing screw is also fixed, and the condition that the screw part is overlapped with the fracture line cannot be solved. Due to the fixed position and limited number of the screws, the screw can not be effectively fixed for comminuted fracture or patella superior and inferior fracture.

SUMMERY OF THE UTILITY MODEL

A first object of the present invention is to provide an internal hook steel plate fixing system for patellar fracture, which can solve the problems of the prior art;

the utility model provides a hook steel plate internal fixation system for patellar fracture, which comprises a fixed plate, a hook claw and a screw;

the hook claw is arranged on one side of the fixing plate, and the screw is arranged in a screw hole of the fixing plate.

Preferably, the fixing plate is of an arc-shaped structure.

Preferably, one end of the fixing plate is connected with the hook claw, the other end of the fixing plate extends along an arc-shaped path, and the surface of the fixing plate facing the patella is an arc-shaped surface.

Preferably, the fixing plate is made of a titanium alloy plate.

Preferably, the length of the fixing plate is 10 mm-100 mm.

Preferably, at least one screw hole is provided on the fixing plate.

Preferably, the fixing plate is provided with 1-5 screw holes.

Preferably, the screw has a diameter of 2.7mm to 3.5mm and a length of 12mm to 40 mm.

Preferably, the section of the claw is one or more of the shapes of circle, ellipse, rectangle, triangle and the like.

Preferably, the end of the hook claw is in a structure or a round structure.

Has the advantages that:

through setting up the hook in the one end of fixed plate, for the fixed knot that the both ends of fixed plate all have the hook among the prior art constructs, the position of adjustment hook and fixed plate that can be convenient according to actual need, applicable in all types of patella fracture, especially upper and lower utmost point fracture or the tear-off fracture on comminuted fracture and the less patella of fracture piece, through the combination of a plurality of fixed steel sheets on equidirectional, realize that all broken fragments of fracture are firm fixed.

The inner surface of the fixing plate is attached to the patella, and the fixing plate is fixed through the screw, so that longitudinal pressure is provided for the fracture broken end, and the steel plate can be tightly attached to the patella through vertical pressure on the surface of the steel plate to the patellar surface. For avulsion fracture, the bone block is fixed by the hook claw, so that injury to tendon tissues such as patellar ligament and the like can be avoided, and early rehabilitation exercise of a patient is facilitated.

The operation is simple and easy to implement, the clinical experience of doctors can be fully exerted, a specific fixing mode (a combination mode of a plurality of fixing steel plates) is temporarily designed in the operation according to the fracture types, the bone quality and the soft tissue conditions of different patients, and the personalized operation is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a front view of a hook plate internal fixation system for patellar fractures according to an embodiment of the present invention;

FIG. 2 is a bottom view of a hook plate internal fixation system for patellar fractures according to embodiments of the present invention;

FIG. 3 is a schematic view of the simple internal fixation for patellar fracture according to an embodiment of the present invention;

fig. 4 is a schematic view of the present invention for internal fixation of a complex and comminuted patellar fracture, according to an embodiment of the present invention.

Description of reference numerals:

1: a fixing plate; 2: a hook claw; 3: screw holes.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 4, in the present embodiment, there is provided a hook steel plate internal fixation system for patellar fracture, which includes a fixation plate 1, a hook claw 2, and a screw.

The hook claw 2 is arranged on one side of the fixing plate 1, and the screw is arranged in the screw hole 3 of the fixing plate 1.

In this embodiment, through set up the hook 2 in the one end of fixed plate 1, for the fixed knot that fixed plate 1's both ends all have hook 2 among the prior art constructs, can be according to the convenient position of adjustment hook 2 of actual need and fixed plate 1, applicable in all types of patella fracture, especially comminuted fracture and the less upper and lower utmost point fracture of patella of fracture piece or tear fracture, through the combination of a plurality of fixed systems on different directions, realize the broken piece of all fractures firmly fixed.

The inner surface of the fixing plate 1 is attached to the patella, and through the fixation of the screw, longitudinal pressure is provided for the fracture broken end, and the steel plate can be tightly attached to the patella through vertical pressure on the surface of the steel plate to the patellar surface. For avulsion fracture, the bone block is fixed by the hook claw 2, so that injury to tendon tissues such as patellar ligament and the like can be avoided, and early rehabilitation exercise of a patient is facilitated.

The operation is simple and easy to implement, the clinical experience of doctors can be fully exerted, and specific fixing modes (a combination mode of a plurality of fixing systems) are temporarily designed in the operation according to the fracture types, the bone quality and the soft tissue conditions of different patients, so that the personalized operation is realized.

Specifically, the fixing plate 1 is of an arc-shaped structure. Further, one end of the fixing plate 1 is connected with the claw 2, the other end of the fixing plate 1 extends along an arc-shaped path, and the surface of the fixing plate 1 facing the patella is an arc-shaped surface. That is, the fixing plate 1 has an arc-shaped curved surface structure having arcs in two directions.

Through setting fixed plate 1 to above-mentioned structural style to fixed plate 1 and the laminating of patella, the steel sheet surface of being convenient for provides vertical pressure to the patellar face.

The fixed plate 1 is made of a titanium alloy plate. In the present embodiment, the fixing plate 1 is made of other materials meeting the standards of the human body implant besides the titanium alloy plate.

The length of the fixing plate 1 is 10 mm-100 mm. In other words, in the actual use process, fixing systems with various specifications can be provided, different fixing systems can be selected to be combined according to the fracture type of the patella, and personalized surgery is realized.

At least one screw hole 3 is provided on the fixation plate 1. The fixing plate 1 is provided with 1-5 screw holes 3. The number of screw holes 3 is determined according to the length of the fixation plate 1.

The screw hole 3 comprises a universal locking screw hole, a locking screw hole or a common screw hole, the screw is a locking screw of 2.7mm-3.5mm and a common compression screw, and the length range is 12mm-40 mm.

The section of the claw 2 is one or more of the shapes of circle, ellipse, rectangle, triangle and the like. The end of the claw is of a structure or a circular structure.

For further explanation of the above internal fixation system of hook steel plate for patellar fracture, the present embodiment further provides the working process of the above system:

when the fixing device is used, a fracture block is temporarily fixed firstly, one side of the fracture fragment is fixed by the hook claw 2, the fracture fragment is temporarily fixed by a common compression screw or directly uses a locking screw, and the arc-shaped curved surface fixing plate 1 is fixed on the surface of the patella through the screw locking hole. Different lengths, numbers and placing positions of the steel plates are selected according to the shapes of the fracture lines and the broken bone blocks in the operation, and the fracture blocks are firmly fixed as a standard. Because the inner surface of the fixing plate 1 is an arc-shaped curved surface, the direction of good adhesion with the surface of the patella can be easily found by adjusting the position of the steel plate. The screw feeding direction can be adjusted within a certain range according to the fracture line and the shape of the bone block.

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; while the utility model has been described in detail and with reference to the foregoing embodiments, it will 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The hook steel plate internal fixing system for patellar fracture is characterized by comprising a fixing plate, a hook claw and a screw;

2. The inside hooking plate fixing system for patellar fracture according to claim 1, wherein the fixing plate has an arc-shaped structure.

3. The hook plate internal fixation system for patellar fractures according to claim 2, wherein one end of the fixation plate is connected to the hook jaw, the other end of the fixation plate extends along an arcuate path, and the face of the fixation plate facing the patella is an arcuate face.

4. The hook steel plate internal fixation system for patellar fracture according to claim 1, wherein the fixation plate is made of a titanium alloy plate.

5. The hook plate internal fixation system for patellar fracture according to claim 1, wherein the length of the fixation plate is 10 mm-100 mm.

6. The inside hooking plate fixing system for patellar fracture according to claim 1, wherein at least one screw hole is provided on the fixing plate.

7. The hook plate internal fixation system for patellar fracture according to claim 6, wherein 1-5 screw holes are provided on the fixation plate.

8. The inside hooking plate fixing system for patellar fracture according to claim 1, wherein the screw has a diameter of 2.7mm to 3.5mm and a length of 12mm to 40 mm.

9. The hook steel plate internal fixation system for patellar fracture according to claim 1, wherein the cross section of the hook claw is one or more of circular, oval, rectangular and triangular.

10. The hook plate internal fixation system for patellar fracture according to claim 1 or 9, wherein the distal end of the hook jaw is a structure or a rounded structure.