Hybrid fixation type joint prosthesis assembly

Abstract

The utility model discloses a mixed fixing type joint prosthesis assembly, belongs to the technical field of joint prostheses, and is designed for solving the problems that a joint prosthesis in the prior art is loosened and even falls off and the like. The utility model discloses a mixed fixing type joint prosthesis assembly which comprises a joint prosthesis which is an arc-shaped face, and the inner concave face of the joint prosthesis comprises a posterior condyle area and a main body area. The biological material layer covers at least part of the posterior condyle area, and the biological material layer is used for forming bone ingrowth between the biological material layer and the to-be-connected bone. According to the mixed fixing type joint prosthesis assembly, the stability of connection is improved through bone ingrowth formed between the biological material layer and the skeleton to be connected, and the problem that in the prior art, bone cement in the posterior condyle area cannot reach the effective penetration depth, and consequently a joint prosthesis is loosened and even falls off from the skeleton of the human body is solved; connection between the joint prosthesis assembly and the to-be-connected skeleton is more stable, and the use experience is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of joint prosthesis, especially to the mixed fixed type joint prosthesis assembly. BACKGROUND

[0002] In order to treat end-stage knee osteoarthritis and other diseases, total knee arthroplasty (TKA) is usually used. Joint replacement surgery is to connect the joint prosthesis to the human skeleton (such as the femur), in order to improve the connection stability of the joint prosthesis and the human skeleton, it is necessary to set the bonding material at the connection between the joint prosthesis and the human skeleton.

[0003] The existing bonding material is usually acrylate (also known as bone cement), which has good functional results and survival rate. Especially in the early postoperative period, the bone cement has good stability, when the bone quality of the patient is poor, the bone cement can fill the defects or compensate for inaccurate bone cutting. Moreover, antibiotics can be added to the bone cement to help reduce the risk of infection.

[0004] The defects of using bone cement as bonding material in joint prosthesis include: unable to pressurize at the femoral condyle area, the bone cement lacks the process of pressurized penetration, resulting in that the bone cement at the posterior condyle area cannot reach the effective penetration depth, leading to the loosening of the joint prosthesis or even falling off from the human skeleton, and the use experience is poor. SUMMARY

[0005] The purpose of the utility model is to provide a mixed fixed type joint prosthesis assembly, which solves the problem of loosening of the joint prosthesis or even falling off from the human skeleton caused by the fact that the bone cement at the posterior condyle area cannot reach the effective penetration depth in the prior art, and the use experience is better.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The mixed fixed type joint prosthesis assembly comprises: a joint prosthesis, which is arc-shaped, the inner concave surface of the joint prosthesis comprises a posterior condyle area and a main body area; and a biological material layer, which covers at least part of the posterior condyle area, the biological material layer is used to form bone ingrowth between the to-be-connected bone.

[0008] In one preferred embodiment, the mixed fixed type joint prosthesis assembly further comprises an adhesive layer, which covers at least part of the main body area.

[0009] In one preferred embodiment, the intersection between the biological material layer and the adhesive layer is linear, curved or jagged.

[0010] In one preferred embodiment, the thickness of the biological material layer and the adhesive layer is equal.

[0011] In one preferred embodiment, a connecting column is formed on the body region and protrudes towards the center of the arc surface, and the outer periphery of the connecting column is coated with the adhesive layer.

[0012] In one preferred embodiment, a body limiting stopper is formed on the edge of the body region, and the adhesive layer covers the body region on the inner side of the body limiting stopper.

[0013] In one preferred embodiment, at the junction of the biological material layer and the adhesive layer, the edges of the biological material layer and the adhesive layer are attached together or have a gap.

[0014] In one preferred embodiment, the adhesive layer is made of acrylate.

[0015] In one preferred embodiment, a posterior condyle limiting stopper is formed on the edge of the posterior condyle region, and the biological material layer covers the posterior condyle region on the inner side of the posterior condyle limiting stopper.

[0016] In one preferred embodiment, the biological material layer is fixedly connected to the posterior condyle region.

[0017] The mixed fixed type joint prosthesis assembly provided by the utility model discloses a joint prosthesis and a biological material layer, the inner concave surface of the joint prosthesis comprises a posterior condyle region, and the biological material layer covers at least part of the posterior condyle region, thereby forming bone ingrowth to improve the stability of connection between the biological material layer and the to-be-connected bone, solving the problem that in the prior art, bone cement at the posterior condyle region cannot reach effective penetration depth, leading to loosening of the joint prosthesis or even falling off from the human bone, and the connection between the joint prosthesis assembly and the to-be-connected bone is more stable, and the use experience is better. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structure diagram of the mixed fixed type joint prosthesis assembly provided by the embodiment of the utility model;

[0019] Figure 2 is the sectional view of the mixed fixed type joint prosthesis assembly provided by the embodiment of the utility model;

[0020] Figure 3 is the combined structure explosion drawing of the mixed fixed type joint prosthesis assembly and the to-be-connected bone provided by the embodiment of the utility model;

[0021] Figure 4 is the structure diagram of the joint prosthesis provided by the embodiment of the utility model.

[0022] In the drawings:

[0023] 1, joint prosthesis; 2, biomaterial layer; 3, bonding layer; 4, bone to be connected; 11, posterior condyle region; 12, body region; 13, connecting column; 41, bone bonding layer; 42, posterior condyle; 111, posterior condyle limiting stop; 122, body limiting stop. DETAILED DESCRIPTION

[0024] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways different from those described herein without departing from the scope of the present application, and it can be apparent to those skilled in the art that similar modifications of the present application can be made without departing from the scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0027] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In the present utility model, unless otherwise expressly provided and limited, the first feature is "on" or "under" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0029] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0030] The present embodiment discloses a hybrid fixed joint prosthesis assembly for replacing a joint to be connected to a bone to be connected. Figures 1 to 3 As shown in the figure, the hybrid fixed joint prosthesis assembly comprises a joint prosthesis 1, a biological material layer 2 and an adhesive layer 3, wherein the inner concave surface of the arc-shaped surface structure of the joint prosthesis 1 comprises a posterior condyle area 11 and a main body area 12, the biological material layer 2 covers at least part of the posterior condyle area 11, and the adhesive layer 3 covers at least part of the main body area 12.

[0031] The biological material layer 2 is used to form bone ingrowth between the joint prosthesis assembly and the bone to be connected 4. Specifically, the posterior condyle 42 of the bone to be connected 4 is directly in contact with the biological material layer 2, and the other positions of the bone to be connected 4 form a bone adhesive layer 41, which is in contact with the adhesive layer 3. The adhesive layer 3 can be made of, but not limited to, acrylic ester (also known as bone cement).

[0032] After the operation, the biological material layer 2 needs enough time to form bone ingrowth between the joint prosthesis assembly and the bone to be connected 4. Before the bone ingrowth occurs, the stability of the joint prosthesis assembly and the bone to be connected 4 is mainly realized by the adhesion between the bone adhesive layer 41 and the adhesive layer 3, so as to avoid loosening of the joint prosthesis assembly.

[0033] In the prior art, the cement in the posterior condyle region cannot reach an effective penetration depth, so it cannot play a fixing role. Compared with the prior art, the posterior condyle region 11 of the mixed fixed type joint prosthesis assembly in the embodiment is not coated with cement, and does not affect the connection stability of the joint prosthesis assembly. After a long enough time, bone ingrowth is formed between the biological material layer 2 and the to-be-connected bone 4, the connection between the joint prosthesis assembly and the to-be-connected bone 4 is more stable, and the risk of loosening of the joint prosthesis assembly is reduced.

[0034] The preparation material of the biological material layer 2 is not limited, and the material capable of forming bone ingrowth between the to-be-connected bone 4 in the prior art can be used. The preparation method of the biological material layer 2 is not limited, as long as it can form bone ingrowth. In the embodiment, the biological material layer 2 is fixedly connected to the posterior condyle region 11 of the joint prosthesis 1, which is convenient for processing and use, and the connection structure between the joint prosthesis assembly and the to-be-connected bone 4 is more stable.

[0035] In view of the different shapes and sizes of the connection end of the to-be-connected bone 4, the shape and size of the joint prosthesis 1 also need to be changed accordingly. In order to improve the connection stability, the junction between the biological material layer 2 and the adhesive layer 3 can be linear, curved or jagged, which provides sufficient adhesion force while leaving enough space for bone ingrowth; the thicknesses of the biological material layer 2 and the adhesive layer 3 are equal, which ensures that the mixed fixed type joint prosthesis assembly can be fully contacted with the to-be-connected bone 4 at each position, and the biological material layer 2 and the adhesive layer 3 can form a good connection relationship with the to-be-connected bone 4.

[0036] In the embodiment, the specific materials for preparing the biological material layer 2 and the adhesive layer 3 are not limited. When the flowability and deformation ability of the used materials are both low, the edges of the biological material layer 2 and the adhesive layer 3 are attached together at the junction between the biological material layer 2 and the adhesive layer 3, so as to avoid reducing the connection stability with the to-be-connected bone 4 due to the gap. When the flowability or the deformation ability of the used materials is high, there is a gap between the edges of the biological material layer 2 and the adhesive layer 3 at the junction between the biological material layer 2 and the adhesive layer 3, and the biological material layer 2 and the adhesive layer 3 can automatically fill the gap after installation, without affecting the stable connection with the to-be-connected bone 4, while avoiding the formation of material accumulation at the junction between the biological material layer 2 and the adhesive layer 3, and avoiding that the biological material layer 2 cannot be fully contacted with the posterior condyle 42 or the adhesive layer 3 cannot be fully contacted with the bone adhesive layer 41 at other positions.

[0037] On the basis of the above structure, the connecting column 13 is formed on the main body area 12 and protrudes towards the center of the arc surface, and the outer periphery of the connecting column 13 is coated with the adhesive layer 3. The connecting column 13 is inserted into the end of the bone 4 to be connected, and in addition to the adhesive force formed between the outer periphery of the connecting column 13 coated with the adhesive layer 3 and the bone 4 to be connected, there is also a friction force between the connecting column 13 and the bone 4 to be connected, thereby enhancing the stability between the joint prosthesis assembly and the bone 4 to be connected.

[0038] On the basis of the above structure, as shown in the drawings, the main body limiting stop 122 is formed on the edge of the main body area 12, and the adhesive layer 3 is coated on the main body area 12 inside the main body limiting stop 122. The main body limiting stop 122 can block the edge of the adhesive layer 3, prevent the material for preparing the adhesive layer 3 from overflowing, ensure that the adhesive layer 3 can be tightly attached to the bone adhesive layer 41 after installation, and improve the stability of the connection. Figure 4

[0039] The posterior condyle limiting stop 111 is formed on the edge of the posterior condyle area 11, and the biological material layer 2 is coated on the posterior condyle area 11 inside the posterior condyle limiting stop 111. The posterior condyle limiting stop 111 can block the edge of the biological material layer 2, prevent the biological material layer 2 from overflowing during the preparation process and the installation process, and enable the biological material layer 2 to be more tightly attached to the posterior condyle 42.

[0040] It can be understood that not setting the main body limiting stop 122 and / or the posterior condyle limiting stop 111 does not affect the normal use of the mixed fixed joint prosthesis assembly. Figure 1 The structure shown in the drawings does not give the main body limiting stop 122 and the posterior condyle limiting stop 111, and the overflow of the adhesive layer 3 and the biological material layer 2 can be avoided by selecting appropriate materials or other means.

[0041] It should be noted that the above is only a preferred embodiment of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.​

Claims

1. A fixed-hybrid joint prosthesis assembly, characterized in that, Comprise: A joint prosthesis (1) is arc-shaped, the inner concave surface of the joint prosthesis (1) comprises a posterior condyle region (11) and a main body region (12); A biomaterial layer (2) covers at least part of the posterior condyle region (11), the biomaterial layer (2) is used to form bone ingrowth with the connected bone (4); and An adhesive layer (3) covers at least part of the main body region (12), at the junction of the biomaterial layer (2) and the adhesive layer (3), the edges of the biomaterial layer (2) and the adhesive layer (3) are pasted together or have a gap.

2. The hybrid fixed-type joint prosthesis assembly of claim 1, wherein, The junction of the biomaterial layer (2) and the adhesive layer (3) is linear, curved or jagged.

3. The hybrid fixed-type joint prosthesis assembly of claim 1, wherein, The thickness of the biomaterial layer (2) and the adhesive layer (3) is equal.

4. The hybrid fixed-type joint prosthesis assembly of claim 1, wherein, A connecting column (13) is formed on the main body region (12) and protrudes towards the center of the arc-shaped surface, the outer periphery of the connecting column (13) is coated with the adhesive layer (3).

5. The hybrid fixed-type joint prosthesis assembly of claim 1, wherein, A main body limiting stop (122) is formed on the edge of the main body region (12), and the adhesive layer (3) covers the main body region (12) on the inner side of the main body limiting stop (122).

6. The hybrid fixed-type joint prosthesis assembly of claim 1, wherein, The adhesive layer (3) is made of acrylate.

7. The hybrid fixed-type joint prosthesis assembly according to any one of claims 1 to 6, wherein, A posterior condyle limiting stop (111) is formed on the edge of the posterior condyle region (11), and the biomaterial layer (2) covers the posterior condyle region (11) on the inner side of the posterior condyle limiting stop (111).

8. The hybrid fixed-type joint prosthesis assembly according to any one of claims 1 to 6, wherein, The biomaterial layer (2) is fixedly connected to the posterior condyle region (11).

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