CN219323476U

CN219323476U - Memory alloy femur neck bone-knitting supporting plate

Info

Publication number: CN219323476U
Application number: CN202222188223.8U
Authority: CN
Inventors: 王欣; 张�浩; 潘振宇; 李可涵; 李宗焕; 方雪
Original assignee: Zhongnan Hospital of Wuhan University
Current assignee: Zhongnan Hospital of Wuhan University
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2023-07-11
Anticipated expiration: 2032-08-19

Abstract

The utility model provides a memory alloy femoral neck coaptation backup pad, includes plate body and layer board, the both sides at plate body top all are provided with first encircling the claw, and the both sides at plate body bottom all are provided with the second encircling the claw, and the both sides first encircling the claw and the second encircling the claw mould into the shape that can encircle the femur under encircling the state, the layer board passes through the connecting plate and sets up in the middle part at plate body top. According to the utility model, the supporting plate is placed at the proximal end of the femur, so that the proximal bone structure of the femoral neck fracture line is supported below the femoral neck, the bone above the bone fracture plate is effectively prevented from moving downwards due to the gravity of a patient, the functions of supporting and preventing the fracture from sliding displacement are achieved, the operation is facilitated, the probability of failure of internal fixation of the fracture is reduced, and the postoperative rehabilitation of the patient is facilitated.

Description

Memory alloy femur neck bone-knitting supporting plate

Technical Field

The utility model relates to the technical field of orthopaedics instruments, in particular to a memory alloy femur neck bone-knitting supporting plate.

Background

The femoral neck fracture is a common fracture type in orthopaedics clinic, the traditional internal fixation method of the femoral neck fracture is to fix through three hollow screws, but for a patient with a fracture line close to the vertical direction, the screw fixation effect is poor, because when the patient stands up, the proximal structure of the fracture line is extremely easy to cause sliding displacement along the fracture line due to the action of the weight of the patient, so that the internal fixation is invalid. The bone fracture plate can be manually bent by a doctor in clinical operation and is applied to supporting and fixing the femur neck fracture, but the operation has the difficulties of prolonged operation time, increased bleeding, poor matching degree of the bone fracture plate and the fracture part, difficult placement of the bone fracture plate in operation and the like.

The nickel-titanium shape memory alloy is a functional material, has the characteristics of high strength, wear resistance, corrosion resistance, no magnetism, good biocompatibility and the like, also has a shape memory effect related to temperature, has reduced hardness and is easy to shape when placed in a cold medium, and generates restoring force and resilience force when the temperature is increased, and returns to the original shape by itself. The memory titanium alloy internal fixation belongs to a novel fracture internal fixation mode, and because the memory titanium alloy internal fixation has a memory effect, the adhesion between a steel plate and a bone surface is tighter than that of a power pressurizing steel plate, and the three-dimensional fixation effect can be exerted on a fracture part, so that the effects of resisting the vertical direction and resisting torsion displacement are better achieved. In addition, the memory alloy has extremely similar elastic modulus with human skeleton, can obviously relieve stress blocking effect, prevent slow healing, bone nonunion, osteoporosis and the like, does not need to carry out large-scale periosteum stripping in operation, can avoid influencing blood circulation, shortens operation time, reduces bleeding amount and promotes bone healing. Related researches show that the patient with the long bone fracture of the upper limb receives the internal fixation treatment of the shape memory alloy embracing device, so that the bone healing time and the operation time can be reduced, the pain of the body can be relieved, and the incidence rate of adverse reactions can be reduced.

The Chinese patent (publication number: CN 107361836A) designs a novel fracture memory alloy internal fixator, but is only suitable for internal fixation of long dry bones of limbs, and is difficult to be applied to encircling internal fixation of a femoral neck.

Disclosure of Invention

In order to solve the problems, the utility model provides a memory alloy femur neck bone-knitting supporting plate, which comprises the following specific technical scheme:

the utility model provides a memory alloy femoral neck coaptation backup pad, includes plate body and layer board, the both sides at plate body top all are provided with first encircling the claw, and the both sides at plate body bottom all are provided with the second encircling the claw, and the both sides first encircling the claw and the second encircling the claw mould into the shape that can encircle the femur under encircling the state, the layer board passes through the connecting plate and sets up in the middle part at plate body top.

Further, both sides of the plate body are hollow, and the hollow middle part is provided with a connecting plate.

Further, the supporting plate and the connecting plate are both suitable for the inclined arrangement of the neck dry angle to the outer side of the plate body.

Further, the inner side surfaces of the plate body, the supporting plate, the first encircling holding claw and the second encircling holding claw are all provided with reinforcing ribs.

The beneficial effects are that:

according to the utility model, the supporting plate is placed at the proximal end of the femur, so that the proximal bone structure of the femoral neck fracture line is supported below the femoral neck, the bone above the bone fracture plate is effectively prevented from moving downwards due to the gravity of a patient, the functions of supporting and preventing the fracture from sliding displacement are achieved, the operation is facilitated, the probability of failure of internal fixation of the fracture is reduced, and the postoperative rehabilitation of the patient is facilitated.

Drawings

Fig. 1 is a view of the front side of the present utility model.

Fig. 2 is a view of the backside of the present utility model.

Fig. 3 is a top view of a stiffening rib of the present utility model.

Fig. 4 is a side view of the present utility model encircling a femur.

Fig. 5 is a front view of the present utility model embracing a femur.

In the figure: 1 plate body, 2 first encircling gripper, 3 second encircling gripper, 4 link plate, 5 layer board, 6 reinforcing rib, 7 connecting plate.

Detailed Description

The utility model is further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1 to 5, a memory alloy femur neck bone-knitting supporting plate comprises a plate body 1 and a supporting plate 5, wherein first encircling holding claws 2 are arranged on two sides of the top of the plate body 1, second encircling holding claws 3 are arranged on two sides of the bottom of the plate body 1, the first encircling holding claws 2 and the second encircling holding claws 3 on two sides are molded into a shape capable of encircling a femur in an encircling state, and the supporting plate 5 is arranged in the middle of the top of the plate body 1 through a connecting plate 7.

Specifically, the plate body 1 is a main body structure of a supporting plate, and the first encircling gripper 2 is used for encircling the femur to fix at the far end of the plate body 1; the second encircling gripping claw 3 is used for encircling femur fixation at the proximal end of the plate body 1; the supporting plate 5 extends from the top of the plate body 1 to the direction of the femoral head and is used for supporting the femoral neck and the femoral head.

As shown in fig. 1 and 2, the plate body 1 has a steel plate structure which can be placed on the front side of the proximal end of the femur and applied on the surface of the femur, two sides of the plate body 1 are hollow, the hollow middle part is provided with a connecting plate 4, on one hand, the plate body 1 with the hollow structure is more easily attached to the femur, and on the other hand, the connecting plate 4 can stabilize the structure of the plate body 1. As shown in fig. 1, the first encircling gripper 2 and the second encircling gripper 3 are in a shape of an unfolded state, and in the unfolded state, the first encircling gripper and the second encircling gripper have no holding force and are in a fully-unfolded state. When its ambient temperature increases (37 ℃), it can be shaped to a hug state in which it has hug forces that can create dynamic pressure at the proximal femur. The first encircling gripping claw 2 and the second encircling gripping claw 3 which are in encircling states can firmly fix the plate body 1 to the femur.

Preferably, the first encircling gripper jaw 2 and the second encircling gripper jaw 3 on both sides can be semicircular or semi-circular-like in the encircling state, or other shapes suitable for patients, so that the first encircling gripper jaw and the second encircling gripper jaw are easy to encircle and fix on the femur.

As shown in fig. 1, 4 and 5, the supporting plate 5 and the connecting plate 7 are obliquely arranged to the outer side of the plate body 1 in a manner of adapting to the neck dry angle; the supporting plate 5 extends towards the femoral head through the connecting plate 7 and forms a certain inclination angle, and the angle depends on the neck shaft angle after fracture reduction, so that the supporting plate 5 is tightly attached to the femoral neck for supporting the femoral neck and the femoral head.

As shown in fig. 1, 2 and 3, reinforcing ribs 6 are arranged on the inner side surfaces of the plate body 1, the supporting plate 5, the first encircling gripper 2 and the second encircling gripper 3; the reinforcing ribs 6 are used for reinforcing the structure of the plate body 1 fixed on the femur, increasing friction force between the plate body 1 and the femur and preventing the plate body 1 from sliding.

As shown in fig. 4 and 5, in this embodiment, the memory alloy bone supporting plate is made of nickel-titanium alloy, and is put into ice water to be unfolded before use, so that the first encircling gripper 2 and the second encircling gripper 3 are in an unfolded state. Then the first encircling holding claw 2 and the second encircling holding claw 3 which are positioned at the two ends of the plate body 1 and are in the unfolding state are arranged at the proper positions of the femur, and the shaping is carried out and the plate body is applied to the femur; simultaneously, the support plate 5 and the connecting plate 7 are shaped obliquely outwards, so that the support plate 5 can be connected with the femur neck today. After the temperature rises, the encircling fixation of the femur and the supporting action on the femur neck are completed, and hot water at 30-50 ℃ can be sprayed to accelerate the shaping fixation of the supporting plate.

The supporting plate is designed according to anatomical characteristics of the head, neck and rotor areas of the femur, and is matched with the bone structure and the shape of the proximal femur of a human body, and the plate body 1 is firmly fixed at the proximal femur through the encircling and reinforcement edges 6 of the first encircling holding claw 2 and the second encircling holding claw 3; the support body has a bearing function on the proximal bone structure of the femoral neck broken line, namely, the femoral head and neck above the inside of the broken line, and can effectively avoid downward sliding of the fractured femoral neck after internal fixation due to the self gravity of a patient, thereby reducing the probability of failure of the internal fixation of the fracture.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A memory alloy femoral neck bone-knitting support plate, which is characterized in that: the plate comprises a plate body and a supporting plate, wherein first encircling holding claws are arranged on two sides of the top of the plate body, second encircling holding claws are arranged on two sides of the bottom of the plate body, the first encircling holding claws and the second encircling holding claws on two sides are molded into shapes capable of encircling a femur in encircling states, and the supporting plate is arranged in the middle of the top of the plate body through a connecting plate.

2. A memory alloy femoral neck bone fracture support plate as in claim 1, wherein: the two sides of the plate body are hollow, and the hollow middle part is provided with a connecting plate.

3. A memory alloy femoral neck bone fracture support plate as in claim 1, wherein: the supporting plate and the connecting plate are both suitable for the inclined arrangement of the neck dry angle to the outer side of the plate body.

4. A memory alloy femoral neck bone fracture support plate according to any one of claims 1 to 3, wherein: the inner side surfaces of the plate body, the supporting plate, the first encircling holding claw and the second encircling holding claw are all provided with reinforcing ribs.