CN112842500A

CN112842500A - Internal fixer for articular surface cortex bone

Info

Publication number: CN112842500A
Application number: CN202011629450.9A
Authority: CN
Inventors: 杨润松; 邓毅; 马秋野; 姜海东; 王晓辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-05-28

Abstract

The embodiment discloses an articular surface cortical bone internal fixation piece, which comprises at least one fixing plate arranged in a cortical bone and a screw for splicing and fixing broken articular surface bone pieces on the fixing plate; the joint surface adopts the manner of cortical bone internal fixation, so that firm and stable internal fixation can be formed, the function exercise can be conveniently carried out in the early stage, the fracture healing time is shortened, and the joint function can be recovered more quickly and better. The operation is simplified, the operation time is shortened, the fracture reduction effect is better, and the anatomical reduction can be achieved. The operation is simple, the installation is convenient, the fractured articular surface bone pieces can be taken out firstly, and the fractured articular surface bone pieces are implanted back into the body after the reduction and the fixation are finished in vitro and then are subjected to the reduction and the fixation.

Description

Internal fixer for articular surface cortex bone

Technical Field

The embodiment relates to the field of bone fracture fixation, in particular to an articular surface cortical bone internal fixation piece.

Background

With the aging population and the increase of traffic accidents, the incidence of fractures is increasing. Among them, the joint surface fracture is a common injury in trauma orthopedics clinic, and becomes a key point and a difficult point in fracture treatment due to the special anatomical structure and extremely high functional requirements. The quality of the results of the internal fixation surgery involving the reduction of the fracture of the articular surface depends on whether the articular surface is restored to be flat and whether the fixation is firm and the early functional exercise of the joint is allowed to be performed to the maximum extent. Early functional exercise is an important means for recovering joint function, and can effectively improve blood circulation, reduce limb swelling, enhance nutrition and metabolic capacity of articular cartilage, and accelerate healing of articular cartilage and surrounding tissues, thereby shortening the fracture treatment process. The stable internal fixation is the key for maintaining the anatomical reduction stability of the joint and is the fundamental guarantee of early functional exercise. At present, the fracture of joint surfaces, such as the fracture of a distal pilon of tibia, the fracture and collapse of a tibial plateau, the fracture of a distal B3 type of humerus, the fracture of a humerus head and the like, is mainly treated by fixing with a countersunk head screw or a Kirschner wire, and fixing and externally implanting bones at certain parts by auxiliary steel plates, so that the fixing requirement is difficult to achieve, the fixation is assisted by plaster or a brace after operation, the treatment requirement is achieved by external fixation, and the relative stability of the fracture is replaced by sacrificing partial functions of joints. The patient suffers from more or less certain dysfunctions after the operation. This is also a difficult problem for orthopedists. And the treatment effect of the articular surface fracture is very different, the improper treatment easily causes the displacement after the fracture reduction, the poor joint movement range, the late traumatic arthritis and other pathological changes and sequelae, the disability rate is higher, and huge economic and social losses are caused.

Disclosure of Invention

In view of the above, the present invention provides an internal fixation device for cortical bone of a joint surface, which can form a strong and stable internal fixation by adopting an internal fixation method for cortical bone of the joint surface, thereby facilitating early functional training and recovering joint function more quickly and better.

The invention relates to an articular surface cortical bone internal fixation piece, which comprises at least one fixing plate arranged in a cortical bone and a screw for splicing and fixing broken articular surface bone blocks on the fixing plate;

further, a screw hole matched and fixed with the screw is formed in the fixing plate;

further, the fixing plate is one of a straight type, an L-shaped, a T-shaped and a net-shaped structure;

furthermore, one end of the fixing plate is inserted into the cortical bone, and the other end of the fixing plate is fixed on the outer surface of the outer bone cortex of the joint or a non-load bearing area in the joint;

furthermore, a plurality of fixing plates can be spliced and fixed;

further, the insertion end of the fixing plate is radially retracted inwards to form an insertion tip, and the insertion tip is provided with a cutting edge;

further, the insertion tip is of an approximately V-shaped structure;

further, the fixing plate is a titanium plate

Further, the screw holes are internally provided with threads matched with the screws, the screw holes are arranged and distributed at equal intervals along the length direction of the fixing plate in a single-row or double-row mode, and the double-row screw holes are distributed in a staggered mode;

furthermore, the tail end of the screw and the nut are both conical.

The invention has the beneficial effects that: the joint surface cortical bone internal fixation piece disclosed by the invention adopts a cortical bone internal fixation mode on the joint surface, can form strong and stable internal fixation, is convenient for performing function exercise in an early stage, shortens fracture healing time, and can recover joint functions more quickly and better. The operation is simplified, the operation time is shortened, the fracture reduction effect is better, and the anatomical reduction can be achieved. The operation is simple, the installation is convenient, the fractured articular surface bone pieces can be taken out firstly, and the fractured articular surface bone pieces are implanted back into the body after the reduction and the fixation are finished in vitro and then are subjected to the reduction and the fixation.

Drawings

The present embodiment is further described with reference to the following drawings and examples:

fig. 1 is a schematic structural diagram of the present embodiment.

Detailed Description

Fig. 1 is a schematic structural diagram of the present embodiment. As shown in the figure: the articular surface cortical bone internal fixation piece of the embodiment comprises at least one fixing plate 1 arranged in cortical bone and screws for splicing and fixing broken articular surface bone pieces on the fixing plate 1; the manner of cortical bone internal fixation is adopted on the joint surface, so that firm and stable internal fixation can be formed, the function exercise can be conveniently carried out in the early stage, and the joint function can be recovered more quickly and better. Different from the existing fixing mode, the existing fixing mode adopts a countersunk head screw for fixing, and if the bone slices are thinner, stable fixing cannot be achieved. In the joint surface cortical bone internal fixation member, the fixing plate 1 is positioned in the cortical bone, the screw penetrates through the outer surface of the cortical bone and is fixed on the fixing plate 1 in the cortical bone, the fixing plate 1 has the fixing function and the reinforcing function, and the fixing plate 1 does not need to be detached in the later period and can coexist with the joint surface or automatically absorb and disappear in the later period by using an absorbable material.

In this embodiment, the fixing plate 1 is provided with a screw hole 2 which is fixed in a matching manner with a screw; the fixing plate 1 can be inserted into the cortical bone, if the bone fragments are thin, a small groove can be formed on the back side of the joint surface, and the fixing plate 1 is embedded into the cortical bone. Simple structure and is more beneficial to operation.

In this embodiment, the fixing plate is one of a straight type, an L-shaped, a T-shaped and a net-shaped structure; the fixing plates with different specifications can be selected according to actual conditions, and the universality is high.

In this embodiment, one end of the fixing plate 1 is inserted into a cortical bone, and the other end is fixed on the outer surface of the outer bone cortex of the joint or the non-load bearing region (such as the intercondylar notch of the femur); form firm stable internal fixation structure, be convenient for carry out the function exercise early, better recovery joint function sooner.

In the embodiment, a plurality of fixing plates 1 can be spliced and fixed; broken articular surface is spliced into an organic whole through 1 or a plurality of fixed plates 1, can make up wantonly, and the commonality is strong.

In this embodiment, the insertion end of the fixing plate 1 is radially retracted to form an insertion tip 3, which has a cutting edge; the insertion into the cancellous bone along the cortical bone is facilitated, and the damage is reduced. Preferably, the insertion tip 3 is of an approximately V-shaped configuration.

In this embodiment, the fixing plate is a 1-position titanium plate; fixing plates made of other absorbable materials and metal materials can also be used); high strength and light weight, and is convenient to coexist in cortical bone of articular surface for a long time.

In this embodiment, the screw hole 2 is internally provided with a thread matched with the screw; the stability and firmness of the structure are improved.

In this embodiment, the screw holes 2 are arranged along the fixing plate 1 in a single row or double rows at equal intervals, and the double rows of screw holes are distributed in a staggered manner; the tail end of the screw and the nut are conical.

Finally, the above embodiments are only used for illustrating the technical solutions in the present embodiments and not for limiting, although the present embodiments are described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions in the present embodiments without departing from the spirit and scope of the technical solutions in the present embodiments, and all of them should be covered in the scope of the claims in the present embodiments.

Claims

1. An articular surface cortex bone internal fixation piece, which is characterized in that: comprises at least one fixing plate arranged in cortical bone and a screw used for splicing and fixing the broken bone blocks of the articular surface on the fixing plate.

2. The articulating cortical endosseous fixation member of claim 1, wherein: and the fixing plate is provided with a screw hole matched and fixed with the screw.

3. The articulating cortical endosseous fixation member of claim 1, wherein: the fixing plate is in one of a straight type structure, an L-shaped structure, a T-shaped structure and a net-shaped structure.

4. The articular surface cortical endosseous fixation of claim 1 or 2, wherein: one end of the fixing plate is inserted into the cortical bone, and the other end of the fixing plate is fixed on the outer surface of the outer bone cortex of the joint or a non-load bearing area in the joint.

5. The articulating cortical endosseous fixation member of claim 1, wherein: the plurality of fixing plates can be spliced and fixed.

6. The articulating cortical endosseous fixation member of claim 4, wherein: the insertion end of the fixing plate is radially retracted inwards to form an insertion tip, and the insertion tip is provided with a cutting edge.

7. The articulating cortical endosseous fixation member of claim 6, wherein: the insertion tip is of an approximately V-shaped configuration.

8. The articulating cortical endosseous fixation member of claim 7, wherein: the fixed plate is a titanium plate.

9. The articulating cortical endosseous fixation member of claim 8, wherein: the screw holes are internally provided with threads matched with the screws, and are distributed in a single-row or double-row mode at equal intervals along the length direction of the fixing plate, and the double-row screw holes are distributed in a staggered mode.

10. The articulating cortical endosseous fixation member of claim 1, wherein: the tail end of the screw and the nut are conical.