CN111374744A - Intramedullary cavity inner side supporting structure suitable for strengthening proximal femoral fracture internal fixation - Google Patents

Abstract

The invention provides a support structure inside the medullary cavity suitable for the internal fixation of proximal femoral fractures, including a fixing plate. The fixing plate is provided with at least two screw holes designed for locking screw holes. The fixing plate is arranged on the inner side of the femoral medullary cavity and is It is arranged to fit the inner side of the femur, and the fixing plate is fixed on the femur through the screw arranged in the screw hole. In order to solve the problems of insufficient internal fixation strength and poor stability of the current proximal femoral fracture. It belongs to the technical field of intertrochanteric fracture repair.

Description

A support structure inside the medullary cavity suitable for strengthening the internal fixation of proximal femoral fractures

technical field

The invention provides an inner support structure of the medullary cavity suitable for strengthening the internal fixation of a proximal femur fracture, and belongs to the technical field of fracture repair.

Background technique

At present, proximal femoral (femoral neck, tuberosity) fractures are generally fixed with sleeve plates, intramedullary nails or cannulated screws. Proximal intramedullary nails (PFNA, etc.) are not stable enough, cannulated nails are of a separate structure and other defects, and the rotation of the fracture end is not controlled enough. Complications such as failure of internal fixation often occur, especially for fractures with severe osteoporosis or instability. need to be resolved.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a support structure inside the medullary cavity suitable for the internal fixation of proximal femoral fractures, so as to solve the problems of insufficient internal fixation strength and poor stability of the current proximal femoral fractures.

In order to solve the above problems, it is proposed to adopt such a support structure inside the medullary cavity suitable for the internal fixation of proximal femoral fractures, including a fixation plate. The inner side of the femoral medullary cavity is arranged in line with the inner side of the femur, and the fixing plate is fixed on the femur through the screw set in the screw hole. The inner side refers to the side close to the inner side of the human thigh. Double cortical fixation.

The current internal fixation includes hip compression screw DHS, proximal femoral intramedullary nail PFNA, cannulated screw and other commonly used internal fixation devices. In the aforementioned internal fixation of the proximal femoral fracture, the fixation plate can be used alone. It is placed on the inner side of the femoral medullary cavity to support the inner side, share the inner pressure, reduce the load of conventional internal fixation (Hip compression screw DHS, proximal femoral intramedullary nail PFNA, cannulated screw, etc.), thereby reducing the failure rate; By means of bridging, the fixation plate is integrated with the conventional internal fixator to form an integral structure to fix the fracture together.

In the aforementioned intramedullary support structure for the internal fixation of proximal femoral fractures, the bridging method can be through 1 to 3 screws through the conventional internal fixator and the fixation plate, linking the two internal fixations into one, or through materials such as bone cement. , to connect the two internal fixations into one.

In the aforementioned intramedullary support structure for the internal fixation of proximal femoral fractures, the medial support structure may be made of a metal material such as titanium alloy that can be implanted in the human body, or a polymer or plastic that can be implanted in the human body such as PEEK material. It is selected according to the fixation strength required by the fracture site.

The fixation plate is placed inside the medullary cavity of the proximal femur, the proximal end can reach under the femoral head, and the distal end can reach the femoral condyle, and the appropriate length and position are selected according to the fracture site. Therefore, the medial bone is relatively strong, so the plate is designed as a locking hole, and the proximal and distal ends of the fracture are fixed with unicortical or bicortical fixation on the inner side of the femoral medullary cavity, forming a medial support structure in the proximal femur. The internal fixation (Hip compression screw DHS, proximal femoral intramedullary nail PFNA, cannulated screw, etc.) are combined together to form an organic combination, complement each other, and reinforce each other to achieve a reasonable and strong fixation of the fracture at the site. The fixation plate can be placed on the inner side of the femoral medullary cavity alone to support the inner side, share the pressure on the inner side, reduce the load of conventional internal fixation, and then reduce the failure rate; the fixation plate can also be bridged with the conventional internal fixator. (Hip compression screw DHS, proximal femoral intramedullary nail PFNA, cannulated screw, etc.) are combined to form a whole structure to fix the fracture together. The bridging method is to pass 1 to 3 screws through the conventional internal fixator and the fixation plate to link the two internal fixations into one, or use materials such as bone cement to connect the two internal fixations into one.

Compared with the prior art, the innovation of the present invention lies in that the inner side of the femoral medullary cavity is under pressure according to the mechanical characteristics and anatomical characteristics of the lower limbs of the human body, so the inner side structure, especially the femoral talus, is much stronger than the outer side, so that the femur can be fully utilized. The stronger bone on the inner side is placed with a steel plate to support and strengthen the internal fixation, effectively sharing the pressure of the human body on the fracture site, improving the internal fixation effect, and ensuring the stable support of the fracture site.

Description of drawings

Fig. 1 is the structural representation that the present invention uses alone;

FIG. 2 is a schematic structural diagram of the present invention used in conjunction with a hip sliding compression screw.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention. .

Example 1:

Referring to FIG. 1 , the present embodiment provides a support structure inside the medullary cavity for internal fixation of proximal femoral fractures, including a fixation plate 1, and the fixation plate 1 is provided with at least two screw holes, which are designed for locking screw holes, and the fixation plate 1 is provided with It is arranged on the inner side of the femoral medullary cavity and fits the inner side of the femur, and the fixing plate 1 is fixed on the femur through the screw 2 set in the screw hole. Single-cortical or double-cortical fixation, the fixation plate 1 can be made of metal materials such as titanium alloy that can be implanted into the human body, or can be made of polymer or plastic that can be implanted into the human body such as PEEK materials. choose.

The fixation plate 1 is placed on the inner side of the femoral medullary cavity alone to support the inner side, share the inner side pressure, reduce the load of conventional internal fixation (Hip compression screw DHS, proximal femoral intramedullary nail PFNA, cannulated screw, etc.) failure rate.

Example 2:

Referring to FIG. 2 , the present embodiment provides a support structure inside the medullary cavity for the internal fixation of proximal femoral fractures, including a fixation plate 1, and the fixation plate 1 is provided with at least two screw holes designed for locking screw holes, and the fixation plate 1 is provided with It is arranged on the inner side of the femoral medullary cavity and fits the inner side of the femur, and the fixing plate 1 is fixed on the femur through the screw 2 set in the screw hole. Single-cortical or double-cortical fixation, the fixation plate 1 can be made of metal materials such as titanium alloy that can be implanted into the human body, or can be made of polymer or plastic that can be implanted into the human body such as PEEK materials. choose.

The fixation plate 1 is used in conjunction with a conventional internal fixator at the same time. By bridging, the fixation plate 1 and the conventional internal fixator are combined into a whole to form an integral structure to fix fractures together. As shown in Figure 2, the fixation plate 1 Used at the same time with the hip sliding compression screw 3, after the fixation plate 1 and the hip sliding compression screw 3 are placed in the designated position, the bridging method can pass 1 to 3 connecting screws 4 through the hip sliding compression screw 3 and the fixing plate 1. Integrate the two internal fixations into one, or connect the two internal fixations together through materials such as bone cement.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (5)

1. A support structure inside the medullary cavity suitable for strengthening the internal fixation of proximal femoral fractures, characterized in that: it comprises a fixing plate (1), and the fixing plate (1) is provided with at least two screw holes, which are designed for locking screw holes , the fixing plate (1) is arranged on the inner side of the femoral medullary cavity and is arranged on the inner side of the femur, and the fixing plate (1) is fixed on the femur by the screw (2) arranged in the screw hole, and the inner side refers to the thigh close to the human body side inside. 2. A kind of intramedullary support structure suitable for strengthening the internal fixation of proximal femoral fracture according to claim 1, characterized in that: the fixation plate (1) is used in conjunction with a conventional internal fixator, and the two are bridged by means of a bridge. For fixed connection, the fixed plate (1) is integrated with the conventional internal fixator to form an integral structure. 3. A kind of inner support structure of medullary cavity suitable for strengthening the internal fixation of proximal femoral fracture according to claim 2, characterized in that: the fixation plate (1) and the hip sliding compression screw in the existing conventional internal fixator (3) When used at the same time, the two kinds of internal fixation are linked together by sliding 1 to 3 connecting screws (4) through the hip compression screw (3) and the fixation plate (1). 4. A kind of inner support structure of the medullary cavity suitable for strengthening the internal fixation of proximal femoral fractures according to claim 2, characterized in that: the fixation plate (1) and the proximal femoral intramedullary in the existing conventional internal fixator The nails are used at the same time, and the two are fixed and connected as a whole by the bone cement poured into the medullary cavity. 5. A kind of intramedullary support structure suitable for strengthening the internal fixation of proximal femoral fracture according to claim 1, characterized in that: the fixing plate (1) is made of metal material, PEEK material or plastic that can be implanted in the human body It is selected according to the fixation strength required by the fracture site.

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