Acetabulum cushion block with antibacterial function

Abstract

The utility model relates to an acetabulum cushion block with an antibacterial function, which comprises a cushion block body, the cushion block body is provided with an outer curved surface and an inner curved surface, the outer curved surface and / or the inner curved surface are / is provided with a plurality of grooves, and antibacterial medicine layers are filled in the grooves. According to the acetabulum cushion block, the grooves are evenly distributed in the outer curved surface and / or the inner curved surface of the cushion block body, the grooves are filled with the antibacterial medicine layers, after the acetabulum cushion block is placed into a human body, antibacterial medicine can be continuously released for a long time, so that the growth of bacteria is inhibited, the antibacterial effect is continuously achieved, and the risk of postoperative infection can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of acetabular prostheses, in particular to an acetabular pad with antibacterial function. Background Art

[0002] Acetabular prosthesis is used to reconstruct the acetabulum side in total hip replacement for end-stage hip diseases (trauma, degeneration, total VI, etc.). It is usually made of metal or plastic materials, with the outer surface combined with human bone and the inner surface matching the artificial femoral head. However, after hip replacement, some patients may experience periprosthetic infection, which may be caused by bacterial contamination during surgery, preoperative primary infection, or postoperative hematogenous or local infection spread. Even if the prosthesis is removed, debridement surgery cannot completely remove the infected tissue. Utility Model Content

[0003] Based on this, it is necessary to provide an acetabular pad with antibacterial function to address the technical problem that some patients may encounter periprosthetic infection after hip replacement surgery.

[0004] The utility model provides an acetabular pad with antibacterial function, comprising a pad body, wherein the pad body has an outer curved surface and an inner curved surface, the outer curved surface and / or the inner curved surface are evenly distributed with a plurality of grooves, and the grooves are filled with an antibacterial drug layer.

[0005] The utility model evenly distributes a number of grooves on the outer curved surface and / or inner curved surface of the pad body and fills the grooves with an antibacterial drug layer. After the acetabular pad is placed in the human body, the antibacterial drug can be continuously released for a long time to inhibit bacterial growth, continuously exert antibacterial effects, and effectively reduce the risk of postoperative infection.

[0006] As a further improvement of the above solution of the utility model, the cushion block body is in a hollow hemispherical structure, and a holding hole coaxially arranged therewith is provided through the cushion block body.

[0007] As a further improvement of the above solution of the utility model, the outer curved surface of the cushion block body is provided with a plurality of grooves arranged along its axial direction at intervals, and the grooves are filled with an antibacterial drug layer.

[0008] As a further improvement of the above solution of the utility model, a plurality of grooves arranged along the meridian direction are circumferentially formed on the outer curved surface of the cushion block body, and the grooves are filled with an antibacterial drug layer.

[0009] As a further improvement of the above solution of the utility model, the inner curved surface of the cushion block body is provided with a plurality of grooves arranged along its axial direction at intervals and along its latitudinal direction, and the grooves are filled with an antibacterial drug layer.

[0010] As a further improvement of the above solution of the utility model, a plurality of grooves arranged along the meridian direction are circumferentially formed on the inner curved surface of the cushion block body, and the grooves are filled with an antibacterial drug layer.

[0011] As a further improvement of the above solution of the utility model, the outer curved surface and / or the inner curved surface of the cushion block body has a micron-level rough porous structure.

[0012] As a further improvement of the above solution of the utility model, the pad body is provided with a plurality of hole rings, which are arranged at intervals along the axial direction of the pad body, and each hole ring includes a plurality of positioning threaded holes distributed circumferentially and penetrating the pad body.

[0013] As a further improvement of the above solution of the utility model, the thickness of the cushion block body is 0.3-0.7 cm.

[0014] As a further improvement of the above solution of the utility model, the pad body is a titanium pad body.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model evenly distributes a number of grooves on the outer curved surface and / or inner curved surface of the pad body and fills the grooves with an antibacterial drug layer. After the acetabular pad is placed in the human body, it can continuously release antibacterial drugs for a long time to inhibit bacterial growth, continuously exert antibacterial effects, and effectively reduce the risk of postoperative infection.

[0017] 2. The cushion block body of the utility model has a hollow hemispherical structure, which conforms to the physiological morphology of the human hip joint, is conducive to restoring the function of the hip joint, can be applied to various bone defect situations, and can fully and calmly cope with all the needs of hip joint revision surgery.

[0018] 3. A holding hole coaxially arranged therewith is provided through the pad body of the utility model, so that the doctor can conveniently perform the operation by inserting the installation tool into the holding hole and then inserting the acetabulum pad into the human body by using the installation tool.

[0019] 4. The outer curved surface and / or inner curved surface of the pad body of the utility model has a micron-level rough porous structure, which is conducive to the growth and fixation of bone tissue.

[0020] 5. The pad body of the utility model is provided with a plurality of hole rings at intervals along the axial direction of the pad body, and each hole ring includes a plurality of circumferentially distributed positioning threaded holes, which is convenient for doctors to perform precise surgical operations. During the operation, multiple screws can be used to fix the acetabulum pad to the patient's autologous bone according to the specific situation to achieve the maximum contact area with the patient's autologous bone. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic structural diagram of an acetabular pad with antibacterial function proposed in Example 1 of the utility model;

[0022] Figure 2 Another perspective view of an acetabular pad with antibacterial function proposed in Example 1 of the utility model;

[0023] Figure 3 for Figure 1 A cross-sectional view of

[0024] Figure 4 This is a cross-sectional view of an acetabular pad with antibacterial function proposed in Example 2 of the utility model.

[0025] Reference numerals: 100, pad body; 110, groove; 120, antibacterial drug layer; 130, holding hole; 140, positioning hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1

[0028] Reference Figure 1 , Figure 2 The present embodiment provides an acetabular pad with antibacterial function, which is filled and assembled in the bone defect area of ​​the patient. The acetabular pad with antibacterial function of the present embodiment includes a pad body 100 with a hollow hemispherical structure. The pad body 100 is made of titanium material, and the pad body 100 has an inner curved surface and an outer curved surface.

[0029] The inner curved surface of the pad body 100 is provided with three grooves 110 arranged along its latitude direction at intervals along its axial direction, and the grooves 110 are filled with an antibacterial drug layer 120, and the inner curved surface has a micron-level rough porous structure. In the present embodiment, the number of the grooves 110 of the inner curved surface is three. Of course, in other embodiments, as long as the structural stability of the acetabular pad is met, the number of the grooves 110 of the inner curved surface can also be other numbers. In the present embodiment, the grooves 110 of the inner curved surface are arranged along the latitude direction of the pad body 100. Of course, in other embodiments, as long as the stability of the acetabular pad is met, a plurality of grooves 110 arranged along the meridian direction of the pad body 100 can also be provided on the circumferential direction of the inner curved surface of the pad body 100, and the antibacterial drug layer 120 can be filled in the grooves 110. The provision of the antibacterial drug layer 120 on the inner curved surface of the pad body 100 allows the antibacterial drug to be stably released from the surface of the pad body 100 after the acetabular pad is placed in the patient's body, which can significantly inhibit bacterial adhesion and provide sustained release of anti-infection and anti-biofilm formation.

[0030] The outer curved surface is used to match with the bone defect site of the patient. When the bone defect amount at the bone defect site of the patient is small, the outer curved surface of the acetabulum pad can directly contact with the patient's native bone; when the bone defect amount at the bone defect site of the patient is large, it is necessary to install an acetabulum filling pad at the bone defect site. The outer curved surface of the acetabulum pad of this embodiment matches with the inner surface of the acetabulum filling pad.

[0031] The outer curved surface has a micron-scale rough porous structure. When the outer curved surface is in direct contact with the patient's native bone, the micron-scale rough porous structure facilitates the attachment of osteoblasts to the acetabular pad, facilitates the mechanical interlocking of osteoblasts and the acetabular pad, and improves the bonding strength between the patient's bone defect and the acetabular pad. When the outer curved surface cooperates with the acetabular filling pad, the micron-scale rough porous structure facilitates the attachment of osteoblasts to the acetabular pad on the one hand, and on the other hand, it also improves the initial fixation friction strength between the acetabular pad of this embodiment and the acetabular filling pad, which facilitates the initial fixation between the acetabular pad of this embodiment and the acetabular filling pad. In this embodiment, the outer curved surface of the acetabular pad can be formed into a micron-scale rough porous structure by sandblasting and acid etching.

[0032] The outer curved surface of the pad body 100 is provided with three grooves 110 arranged along its latitude direction at intervals along its axial direction, and the grooves 110 are filled with an antibacterial drug layer 120. In this embodiment, the number of grooves 110 is three. Of course, in other embodiments, as long as the structural stability of the acetabular pad is met, the number of grooves 110 can also be other numbers. In this embodiment, the grooves 110 are arranged along the latitude direction of the pad body 100. Of course, in other embodiments, as long as the stability of the acetabular pad is met, a plurality of grooves 110 arranged along the meridian direction of the pad body 100 can also be provided on the circumference of the outer curved surface of the pad body 100, and the grooves 110 are filled with an antibacterial drug layer 120. The setting of the antibacterial drug layer 120 on the outer curved surface of the pad body 100 allows the antibacterial drug to be stably released from the surface of the pad body 100 after the acetabular pad is placed in the patient's body, which can significantly inhibit bacterial adhesion and can slowly release anti-infection and anti-biofilm formation.

[0033] It should be noted that, in this embodiment, the antimicrobial drug layer 120 is formed by filling the groove 110 with an antimicrobial drug, and the antimicrobial drug may be an antibiotic, such as vancomycin.

[0034] In order to facilitate the press-fitting of the acetabulum pad of this embodiment to the bone defect site of the patient, a holding hole 130 for inserting an installation tool and coaxially arranged therewith is formed through the pad body 100, and the holding hole 130 is a threaded hole.

[0035] Furthermore, in order to improve the assembly stability between the acetabular pad of this embodiment and the patient's autologous bone, the pad body 100 is provided with two hole rings, which are spaced apart along the axial direction of the pad body 100, and each hole ring includes a plurality of positioning holes 140 distributed circumferentially and penetrating the pad body 100. By providing a plurality of positioning holes 140, a plurality of screws can be used to fix the acetabular pad to the patient's autologous bone during surgery, so as to achieve multi-screw, multi-angle, and multi-position fixation of the acetabular pad and achieve the maximum contact area with the patient's autologous bone.

[0036] In this embodiment, the outer diameter of the pad body 100 is not specifically limited. The outer diameter of the pad body 100 can be reasonably set according to the differences in the bone defect sites of different patients, so that the acetabular pad can achieve the best match with the patient's bone defect site. In this embodiment, the thickness of the pad body 100 is 0.3-0.7cm, which meets the differences of different individual patients. It should be noted that the inner diameter and outer diameter of the pad body 100 of this embodiment are not specifically limited. The inner diameter and outer diameter of the pad body 100 can be reasonably set according to the size of the patient's bone defect site. If the bone defect site is large, several acetabular pads of different sizes can be pressed into the bone defect site. The micron-level rough porous structure of the inner and outer curved surfaces not only improves the initial fixation friction strength between the acetabular pads, which is beneficial to the initial fixation between the acetabular pads, but also facilitates the attachment of osteoblasts to the acetabular pads.

[0037] Example 2

[0038] This embodiment provides an acetabular pad with antibacterial function, which is used for rotationally connecting with the femoral head. The difference from the embodiment 1 is: Figure 3 , Figure 4 In this embodiment, the inner curved surface is smooth and is used for docking with the femoral head. In this embodiment, the inner diameter of the pad body 100 is not specifically limited. The inner diameter of the pad body 100 can be reasonably set according to the individual differences of the femoral heads of different patients, so that the acetabular pad can dock with the patient's femoral head to achieve the best.

[0039] It should be noted that the acetabular pad connected to the femoral head in this embodiment can be connected to the acetabular pad of embodiment 1 assembled at the bone defect site of the patient by using bone screws.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An acetabular pad with antibacterial function, characterized in that: include: A cushion block body (100), the cushion block body (100) having an outer curved surface and an inner curved surface, the outer curved surface and / or the inner curved surface being evenly distributed with a plurality of grooves (110), and the grooves (110) being filled with an antimicrobial drug layer (120); The cushion block body (100) is in a hollow hemispherical structure, and a holding hole (130) is provided through the cushion block body (100) and is coaxially arranged therewith.

2. The acetabular pad with antibacterial function according to claim 1, characterized in that: The outer curved surface of the cushion block body (100) is provided with a plurality of grooves (110) spaced apart along its axial direction and arranged along its latitudinal direction, and the grooves (110) are filled with an antibacterial drug layer (120).

3. The acetabular pad with antibacterial function according to claim 1 or 2, characterized in that: A plurality of grooves (110) arranged along the meridian direction are formed in the circumferential direction of the outer curved surface of the cushion block body (100), and the grooves (110) are filled with an antibacterial drug layer (120).

4. The acetabular pad with antibacterial function according to claim 1 or 2, characterized in that: The inner curved surface of the cushion block body (100) is provided with a plurality of grooves (110) spaced apart along its axial direction and arranged along its latitudinal direction, and the grooves (110) are filled with an antibacterial drug layer (120).

5. The acetabular pad with antibacterial function according to claim 1 or 2, characterized in that: The inner curved surface of the cushion block body (100) is provided with a plurality of grooves (110) arranged along its meridian direction in the circumferential direction, and the grooves (110) are filled with an antibacterial drug layer (120).

6. The acetabular pad with antibacterial function according to claim 1, characterized in that: The outer curved surface and / or the inner curved surface of the cushion block body (100) has a micron-scale rough porous structure.

7. The acetabular pad with antibacterial function according to claim 1, characterized in that: The cushion block body (100) is provided with a plurality of hole rings, which are arranged at intervals along the axial direction of the cushion block body (100), and each hole ring comprises a plurality of positioning threaded holes (140) which are distributed in the circumferential direction and penetrate the cushion block body (100).

8. The acetabular pad with antibacterial function according to claim 1, characterized in that: The thickness of the cushion block body (100) is 0.3-0.7 cm.

9. The acetabular pad with antibacterial function according to claim 1, characterized in that: The cushion block body (100) is a titanium cushion block body.

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