CN214645115U

CN214645115U - Forming die for bone defect restoration body

Info

Publication number: CN214645115U
Application number: CN202120522992.XU
Authority: CN
Inventors: 王德欣
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-11-09
Anticipated expiration: 2031-03-12

Abstract

The utility model discloses a forming die for a bone defect prosthesis, which comprises a die body, wherein a first alloy pipe is arranged in the die body, and a plurality of reinforced fiber holes are arranged on the inner wall of the first alloy pipe; the first alloy pipe and the die body are both hollow cylinders and are arranged coaxially; a plurality of second alloy pipes are also arranged in the first alloy pipe; the inner cavity formed by the die body and the first alloy pipe, the inner cavity formed by the first alloy pipe and the second alloy pipe and the inner cavities of the second alloy pipes are sequentially a large inner cavity, a conical channel and a small inner cavity from top to bottom. The mold can effectively compound the reinforced fiber, the biomedical polymer material and the alloy material, and carry out compression orientation self-reinforcement on the biomedical polymer material, thereby preparing the bone defect restoration with excellent performance.

Description

Forming die for bone defect restoration body

Technical Field

The utility model relates to a forming die technical field, concretely relates to a forming die for bone defect prosthesis.

Background

The loosening of prosthesis after bone defect and artificial joint replacement is two major problems faced by orthopedists and researchers at present. Bone defects can be caused by infection, tumors, trauma, and various congenital diseases. The clinical methods for repairing bone defects include autologous bone grafting, allogeneic bone grafting, bone grafting substitute materials and the like.

Currently, there are many bone repair materials synthesized by the human hand. The bone repair material with clinical application value is generally compounded by taking the existing natural material as a base and then carrying out a series of processing methods such as synthesis, modification, doping and the like. The organic polymer material has good mechanical and processing properties, and can meet the requirements of a plurality of tissues in the repair process, such as polymer materials of polylactic acid, polyglycolic acid and the like. In addition, inorganic materials such as hydroxyapatite, tricalcium phosphate and the like have been used as scaffold materials in the past, or the inorganic materials and organic polymer materials are compounded to construct tissue engineering bone scaffolds to repair bone defect parts. The mechanical property of the current bone repair material used in clinic can be greatly different from the self-body bone mechanical property, and the direct basis of metal and tissue can not completely achieve the bone defect repair and regeneration. Therefore, it is necessary to design a mold to prepare a composite material with excellent properties.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: aiming at the defects in the prior art, the mould for forming the bone defect repair body is provided, the mould can effectively compound reinforced fibers, biomedical polymer materials and alloy materials, and the biomedical polymer materials are compressed, oriented and self-reinforced, so that the bone defect repair body with excellent performance is prepared.

In order to solve the technical problem, the technical scheme of the utility model is that:

a forming die for a bone defect prosthesis comprises a die body, wherein a first alloy pipe is arranged in the die body, and a plurality of reinforcing fiber holes are formed in the inner wall of the first alloy pipe; the first alloy pipe and the die body are both hollow cylinders and are arranged coaxially; a plurality of second alloy pipes are also arranged in the first alloy pipe;

the inner cavity formed by the die body and the first alloy pipe, the inner cavity formed by the first alloy pipe and the second alloy pipe and the inner cavities of the second alloy pipes are sequentially a large inner cavity, a conical channel and a small inner cavity from top to bottom.

As an improvement of the above technical solution, the inner wall of the second alloy pipe is also provided with a plurality of reinforcing fiber holes.

Preferably, in the above aspect, the plurality of second alloy pipes are arranged in parallel in the first alloy pipe.

Preferably, in the above aspect, the sum of the outer diameters of the plurality of second alloy pipes is smaller than the inner diameter of the first alloy pipe.

Preferably, the diameter of the reinforcing fiber hole is 0.5-2.5 mm.

As an improvement of the technical scheme, the surfaces of the first alloy pipe and the second alloy pipe are both provided with micro-arc oxidation coatings.

Preferably, the angle of the inclined angle of the conical channel is 25-45 °.

Since the technical scheme is used, the beneficial effects of the utility model are that:

the utility model provides a forming die for bone defect restoration, which comprises a die body, wherein a first alloy pipe is arranged in the die body, and a plurality of reinforced fiber holes are arranged on the inner wall of the first alloy pipe; the first alloy pipe and the die body are both hollow cylinders and are arranged coaxially; a plurality of second alloy pipes are also arranged in the first alloy pipe; an inner cavity formed by the die body and the first alloy pipe, an inner cavity formed by the first alloy pipe and the second alloy pipe, and an inner cavity of the second alloy pipe are a large inner cavity, a conical channel and a small inner cavity from top to bottom in sequence. During molding, firstly, the reinforced fibers penetrate through the reinforced fiber holes on the first alloy pipe to build a reinforced fiber grid structure, then, the biomedical polymer material is injected into an inner cavity formed by the first alloy pipe and the mold body, an inner cavity formed by the first alloy pipe and the second alloy pipe and inner cavities of the second alloy pipes, and molding is carried out through freeze drying or other modes. The biomedical polymer material sequentially passes through the large inner cavity, the conical channel and the small inner cavity and is extruded through the conical channel to achieve the purpose of molecular chain orientation, and after freeze drying, the orientation is fixed, so that the prepared material has excellent mechanical properties. The utility model provides a forming die can prepare the excellent reinforcing fiber/alloy biomedical macromolecular material bone defect restoration of performance. The shape of the mould body can also be customized according to individual requirements.

The utility model provides a forming die for bone defect prosthesis also is provided with a plurality of reinforcing fiber holes on the inner wall of second alloy pipe. During molding, the reinforced fibers sequentially and respectively pass through the reinforced fiber holes on the first alloy pipe and the second alloy pipe, and the built reinforced fiber grid structure is more stable, so that the prosthesis material is better reinforced. The second alloy pipes are arranged in parallel in the first alloy pipe. The sum of the outer diameters of the second alloy pipes is smaller than the inner diameter of the first alloy pipe. The diameter of the reinforced fiber holes is 0.5-2.5mm, and the diameter of the reinforced fiber holes and the arrangement of the reinforced fiber holes can be arranged according to the requirement of the reinforced fibers.

The utility model provides a surface that is arranged in defective prosthesis's forming die of bone states the surface of the first alloy pipe, the surface of second alloy pipe all is provided with micro arc oxidation coating, effectively improves defective prosthesis and the combining ability of internal bone tissue, and then improves defective prosthesis's prosthetic ability of bone.

The utility model provides an angle at the angle of inclination of toper passageway is 25-45 among the forming die for bone defect prosthesis, and biomedical macromolecular material can realize the molecular chain orientation under toper passageway constant pressure, and then improves the intensity of material.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic diagram of the internal structure of the embodiment of the present invention;

in the drawings, 1. a mold body; 2. a first alloy pipe; 3. reinforcing fiber pores; 4. a second alloy tube; 5. micro-arc oxidation coating; 6. a large inner cavity; 7. a tapered channel; 8. a small lumen.

Detailed Description

The invention is further explained below with reference to the drawings and examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Examples

As shown in fig. 1 to 2, a forming die for a bone defect prosthesis comprises a die body 1, wherein a first alloy pipe 2 is arranged in the die body 1, and a plurality of reinforcing fiber holes 3 are arranged on the inner wall of the first alloy pipe 2; the first alloy pipe 2 and the die body 1 are both hollow cylinders and are arranged coaxially; a plurality of second alloy pipes 4 are also arranged in the first alloy pipe 2; a plurality of the second alloy tubes 4 are arranged in parallel inside the first alloy tube 2; the sum of the outer diameters of the second alloy pipes 4 is smaller than the inner diameter of the first alloy pipe 2; the inner wall of the second alloy pipe 4 is also provided with a plurality of reinforced fiber holes 3; the diameter of the reinforced fiber hole 3 is 0.5-2.5 mm; during molding, firstly, reinforcing fibers sequentially pass through the reinforcing fiber holes in the first alloy pipe and the reinforcing fiber holes in the first alloy pipe, so that a reinforcing fiber grid structure is built, then, biomedical polymer materials are injected into an inner cavity formed by the first alloy pipe and the mold body, an inner cavity formed by the first alloy pipe and the second alloy pipe, and inner cavities of the second alloy pipes, and molding is carried out through freeze drying or other modes. The utility model provides a forming die can prepare reinforcing fiber/alloy/biomedical macromolecular material bone defect restoration. The shape of the mould body can also be customized according to individual requirements.

In this embodiment, the surface of the first alloy pipe 2 and the surface of the second alloy pipe 4 are both provided with a micro-arc oxidation coating 5; effectively improves the combining ability of the bone defect repair body and the bone tissue in the human body.

The inner cavity formed by the die body 1 and the first alloy pipe 2, the inner cavity formed by the first alloy pipe 2 and the second alloy pipe 4, and the inner cavities of the second alloy pipes 4 are a large inner cavity 6, a conical channel 7 and a small inner cavity 8 from top to bottom in sequence. The angle of inclination of the conical channel 7 is 25-45 °. During molding, the biomedical polymer material is injected from the large inner cavity, sequentially extruded through the large inner cavity and the tapered channel, then enters the small inner cavity, and is subjected to freeze drying and molding. The biomedical polymer material is induced to achieve the aim of molecular chain orientation in the process of passing through the conical channel, so that the mechanical property of the material is improved.

The research is funded by a youth project (fund number: QC2017120) of natural science fund of Heilongjiang province.

Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims

1. A forming die for bone defect restoration comprises a die body and is characterized in that: a first alloy pipe is arranged in the die body, and a plurality of reinforcing fiber holes are formed in the inner wall of the first alloy pipe; the first alloy pipe and the die body are both hollow cylinders and are arranged coaxially; a plurality of second alloy pipes are also arranged in the first alloy pipe;

2. A molding die for a bone defect prosthesis according to claim 1, wherein: and a plurality of reinforced fiber holes are also formed in the inner wall of the second alloy pipe.

3. A molding die for a bone defect prosthesis according to claim 1, wherein: the second alloy pipes are arranged in parallel in the first alloy pipe.

4. A molding die for a bone defect prosthesis according to claim 1, wherein: the sum of the outer diameters of the second alloy pipes is smaller than the inner diameter of the first alloy pipe.

5. A molding die for a bone defect prosthesis according to claim 1, wherein: the diameter of the reinforced fiber hole is 0.5-2.5 mm.

6. A molding die for a bone defect prosthesis according to claim 1, wherein: and micro-arc oxidation coatings are arranged on the surfaces of the first alloy pipe and the second alloy pipe.

7. A molding die for a bone defect prosthesis according to claim 1, wherein: the angle of the inclination angle of the conical channel is 25-45 degrees.