CN201200499Y - Latticed metal orthopedic implant - Google Patents

Abstract

The utility model discloses a mesh-shaped metal orthopedic implant, the surface of which has three-dimensional mesh holes, which include a plurality of holes extending from the surface of the implant and transverse channels connecting some or all of the holes. When a patient with bone disease is implanted with the mesh-shaped metal orthopedic implant, bone cells will grow into the holes and channels of the three-dimensional mesh holes and surround and lock, thereby effectively preventing the implant and bone from being separated and loosened for a long time.

Description

Mesh Metal Orthopedic Implants

technical field

The utility model relates to a grid-like metal orthopedic implant.

Background technique

When human bones suffer from tumors, degenerative lesions, trauma, congenital deformities, etc., it is often necessary to use plate-shaped or columnar orthopedic implants to fuse, fill, connect, support or replace bone lesions and defects. There are many materials for orthopedic implants, such as autologous bone, allogeneic bone, bioceramics, silica gel and metal materials, etc. Among them, various orthopedic implants made of metal materials are the most widely used, but after all, bones The interface attached to the metal surface cannot produce a biological combination. As time goes by, the bone and metal material will gradually become loose, which will bring hidden dangers to the stability of the implant.

Utility model content

The purpose of the utility model is to provide a metal orthopedic implant that prevents long-term loosening.

In order to achieve the above object, the utility model takes the following design scheme:

A grid-like metal orthopedic implant, characterized in that the surface layer of the implant has a three-dimensional mesh, and the three-dimensional mesh includes several holes from the surface of the implant and the connecting part or all of the holes. The transverse channel of the hole.

The implant is plate-shaped or column-shaped.

The three-dimensional mesh is arranged in the whole structure of the metal orthopedic implant.

The three-dimensional mesh is arranged in the partial structure of the metal orthopedic implant, and the rest of the structure is a dense metal body.

The transverse channel is a single-layer channel or a multi-layer channel.

It is made of medical grade metal.

The surface of the three-dimensional mesh has a hydroxyapatite coating.

The utility model has the advantages of:

1. The grid-like metal orthopedic implant of the present invention has a three-dimensional mesh on the surface of the implant, and the three-dimensional mesh includes several holes facing inward from the surface of the implant and transverse channels connecting some or all of the holes. After the patient suffers from bone disease and is implanted with the grid-shaped metal orthopedic implant, the bone cells will fit and grow into the holes and channels of the three-dimensional mesh and surround the atresia to effectively prevent the implant and bone from detaching for a long time loosening effect.

2. In the grid-like metal orthopedic implant of the present invention, the three-dimensional mesh is arranged in the local structure of the metal orthopedic implant, and the rest of the structure is a dense metal body. The dense metal body is based on the difference in bone damage of the patient and the needs of biomechanics, in an appropriate position such as the core or edge of the implant or other parts to bear large mechanical loads such as tensile, compressive, bending, Anti-twist function.

3. The grid-like metal orthopedic implant of the present invention, in which the transverse channel is a multi-layer channel, if it is considered that the volume of the dense metal body needs to be designed to be large in order to bear a large mechanical load, it will be attached to the dense metal The grid-like channels on the body surface can also adopt a single layer.

4. The grid-shaped metal orthopedic implant of the present invention, wherein the surface of the three-dimensional mesh is coated with hydroxyapatite, which has the function of inducing bone cell ingrowth.

Description of drawings

Fig. 1 is a schematic diagram of a three-dimensional structure of a grid-like metal orthopedic implant embodiment of the present invention (the three-dimensional mesh body is arranged in the overall structure of the implant body)

Fig. 2 is a three-dimensional structural schematic diagram of the second embodiment of the grid-like metal orthopedic implant of the present invention (the dense metal body bearing the mechanical load is arranged along the axis)

Fig. 3 is a three-dimensional structural schematic diagram of the third embodiment of the grid-like metal orthopedic implant of the present invention (a dense metal body bearing mechanical loads is arranged on an appropriate part of the outer surface)

Fig. 4 is a schematic diagram of an embodiment of the use of the grid-shaped metal orthopedic implant of the present invention (for support and fusion of vertebral bodies of the spine)

Fig. 5 is a schematic diagram of an embodiment of the grid-shaped metal orthopedic implant of the present invention (for replacement and filling of mandibular defect parts)

Fig. 6 is a schematic diagram of an embodiment of the grid-shaped metal orthopedic implant of the present invention (for bone connection)

Fig. 7 is a schematic diagram of an embodiment of the grid-shaped metal orthopedic implant of the present invention (for bone filling)

Fig. 8 is a schematic diagram of the structure of the three-dimensional network body in the utility model (the three-dimensional network body has a single-layer channel in the horizontal direction)

Fig. 9 is the second schematic diagram of the three-dimensional network body structure in the utility model (the three-dimensional network body has multi-layer channels in the horizontal direction)

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the grid-shaped metal orthopedic implant 1 of the present invention is characterized in that the surface layer of the implant has a three-dimensional mesh, and the three-dimensional mesh includes several self-implants The hole 2 with the surface facing inward and the transverse channel 3 connecting part or all of the holes 2.

The implant 1 is plate-shaped (as shown in FIG. 3 ) or column-shaped (as shown in FIGS. 1 and 2 ) or other shapes.

The three-dimensional mesh is arranged in the whole structure of the metal orthopedic implant 1 (as shown in FIG. 1 ).

The three-dimensional mesh is arranged in the local structure of the metal orthopedic implant 1, and the rest of the structure is a dense metal body 4 (as shown in Fig. 2 and Fig. 3).

The transverse channel 3 is a single-layer channel (as shown in FIG. 8 ) or a multi-layer channel (as shown in FIG. 9 ).

The surface of the three-dimensional mesh has a hydroxyapatite coating, and the hydroxyapatite coating can be formed by a conventional plasma spraying method or an electrochemical deposition method.

The transverse tunnels 3 can be arranged in parallel, cross or in a network.

The processing and manufacturing method of the grid-like metal orthopedic implant of the utility model is: according to the size and shape required by the operation, a grid-like metal orthopedic implant solid model is established in the computer, and then processed by laser or high-energy electron beam It can also use methods such as electric discharge machining and chemical corrosion to etch and corrode the required mesh on the surface of the metal orthopedic implant blank that has been cast or forged. In addition, the required mesh can also be obtained by powder sintering. mesh structure. The grid-like metal orthopedic implant of the utility model is made of medical metal materials with good biocompatibility.

Considering the needs of chimeric ingrowth of bone cells, the pore size of the three-dimensional mesh is usually controlled between 0.05 and 8 mm.

Examples of applications of the grid-like metal orthopedic implant of the present invention are fusion, filling, connection, support or replacement. As shown in Figure 4, the grid-like metal orthopedic implant 1 is in block or column shape, which is used for supporting the intervertebral space of the spine. As the bone tissue grows into the implant 1, the adjacent vertebrae will eventually body fusion. As shown in FIG. 5 , the metal orthopedic implant 1 in a grid shape is formed into a plate shape, and is used for replacing mandibular defect parts. As shown in Fig. 6, the metal orthopedic implant 1 in a grid shape is in a columnar shape, and is used for connection after a fracture of a tubular bone. As shown in FIG. 7 , the metal orthopedic implant 1 in a grid shape is in a block shape and is used for filling bone defects.

Claims (7)

1, a kind of latticed metal orthopaedics implant is characterized in that this implant top layer has three-dimensional mesh, and described three-dimensional mesh comprises that several are from the implant surfaces hole inwards and the horizontal duct in connected component or whole described holes.

2, latticed metal orthopaedics implant according to claim 1 is characterized in that this implant is plate-like or column.

3, latticed metal orthopaedics implant according to claim 1 is characterized in that described three-dimensional mesh is arranged in the entire body structure of described metal orthopaedics implant.

4, latticed metal orthopaedics implant according to claim 1 is characterized in that described three-dimensional mesh is arranged in the partial structurtes of described metal orthopaedics implant, and the remainder structure is the compact metal body.

5, according to claim 1 or 2 or 3 or 4 described latticed metal orthopaedics implants, it is characterized in that described horizontal duct is monolayer duct or multilamellar duct.

According to claim 1 or 2 or 3 or 4 described latticed metal orthopaedics implants, it is characterized in that 6, it adopts medical metal to make.

7, according to claim 1 or 2 or 3 or 4 described latticed metal orthopaedics implants, it is characterized in that the surface of described three-dimensional mesh has hydroxyapatite coating layer.

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