Multi-hole tantalum rod and preparation method thereof

A technology of porous tantalum and multi-level pores, applied in bone implants, etc., can solve the problems of poor bone conduction and bone fusion performance, uneven distribution of pore structure, poor matching of mechanical properties, etc., and achieve excellent performance and adjustable mechanical properties , evenly distributed effect

Pending Publication Date: 2019-05-28
深圳大洲医学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the limitations of the preparation and processing technology, the current porous tantalum implant has a single channel, uneven pore structure, and uncontrollable; the distribution of the pore structure is uneven, and the connectivity of the channel is poor, resulting in the mechanical properties of the porous tantalum implant matching the human bone. Poor performance, poor bone conduction and bone fusion performance, which limits its application and performance in the field of orthopedics

Method used

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  • Multi-hole tantalum rod and preparation method thereof
  • Multi-hole tantalum rod and preparation method thereof

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preparation example Construction

[0030] The present invention also provides a method for preparing a porous tantalum rod described in the above technical solution, comprising the following steps:

[0031] (1) Construct the three-dimensional model of the above-mentioned porous tantalum rod in the three-dimensional software model;

[0032] (2) After determining the printing direction of the three-dimensional model obtained in the step (1) and setting the substrate, the three-dimensional model is layered, and the layered processing includes dividing the three-dimensional model into layers with the same thickness along the printing direction. 3D structure, save and import the file in the corresponding format;

[0033] (3) Import the format file obtained in the step (2) into a 3D printer for 3D printing to obtain a porous tantalum rod.

[0034] The present invention constructs the three-dimensional model of the porous tantalum rod in the three-dimensional software model.

[0035] The present invention has no spe...

Embodiment 1

[0044] A porous tantalum rod, the porous tantalum rod includes a threaded part and a multi-stage hole part, the threaded part and the multi-stage hole part are penetrated by three-dimensional circular holes; the three-dimensional circular holes are arranged in a row; the threaded part The length is 30mm, the thread outer diameter of the threaded part is 14mm, the inner diameter is 12mm, the middle diameter is 13mm, the pitch is 2mm, the number of threads is 1, the lead is 2mm, the rise angle is 4°, and the thread angle is trapezoidal; The diameter of the multi-stage hole is 10 mm, and the length is 70 mm; the multi-stage hole includes a three-stage porous structure; the diameters of the circular holes of the three-stage porous structure are respectively 300 μm, 500 μm and 800 μm, and in the multi-stage hole The length of the porous structure with a pore diameter of 300 μm is 5 mm, the length of the porous structure with a pore diameter of 500 μm in the hierarchical pore part is 2...

Embodiment 2

[0052] A porous tantalum rod, the porous tantalum rod includes a threaded part and a multi-stage hole part, the threaded part and the multi-stage hole part are penetrated by three-dimensional circular holes; the three-dimensional circular holes are arranged in a row; the threaded part The length is 30mm, the thread outer diameter of the threaded part is 14mm, the inner diameter is 12mm, the middle diameter is 13mm, the pitch is 2mm, the number of threads is 1, the lead is 2mm, the rise angle is 4°, and the thread angle is trapezoidal; The diameter of the multi-stage hole is 10 mm, and the length is 70 mm; the multi-stage hole includes four sections of porous structure; the three-dimensional circular holes of the four sections of porous structure are respectively 200 μm, 400 μm, 600 μm and 800 μm; the multi-level The length of the porous structure with a diameter of 200 μm in the hole is 10 mm, the length of the porous structure with a diameter of 400 μm in the multi-level hole ...

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Abstract

The invention provides a multi-hole tantalum rod, and belongs to the technical field of human implant materials. The multi-hole tantalum rod comprises a threaded portion and a multi-stage hole portion, wherein three-dimensional circular holes penetrate through the threaded portion and the multi-stage hole portion; the apertures of the circular holes are distributed in a gradient mode from small tolarge from the threaded portion to the multi-stage hole portion. The multi-hole tantalum rod prepared by a 3D printing process of powder bed melting is provided with the circular holes distributed inthe gradient mode; the multiple holes in the tantalum rod are distributed uniformly and are controllable, so that bone conduction and bone fusion are promoted; the hole structure and the mechanical properties such as elasticity modulus are adjustable, so that the property is much closer to human skeletal property. According to data of the embodiment, the multi-hole tantalum rod has a compressionstrength of 120-180 MPa, an elasticity modulus of 10-20 GPa, and a porosity rate of 75-85%.

Description

technical field [0001] The invention relates to the technical field of human body implant materials, in particular to a porous tantalum rod and a preparation method thereof. Background technique [0002] Tantalum is an ideal biomedical material, with good biocompatibility, almost no stimulation and side effects to the human body, and is widely used in the medical field. Using cell cultures, the scientists confirmed that the osteoblasts had a binding reaction with pure tantalum metal, a metal with long-term biocompatibility. In recent years, porous tantalum metal made of tantalum has been widely used in the field of orthopedics. The overall interconnected porosity of porous tantalum metal is 75-80%, and the average porosity is 430 μm. Good biological fixation is achieved between the tantalum implant and the bone. , suitable for rapid growth of human tissue. [0003] However, due to the limitations of the preparation and processing technology, the current porous tantalum imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/28
Inventor 杨景周张大琛
Owner 深圳大洲医学科技有限公司
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