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Alloy bone trabecular acetabular cup with gradient porosity and manufacturing method thereof

A technology of gradient pores and manufacturing methods, which is applied in the direction of acetabular sockets, hip joints, joint implants, etc., can solve problems such as unfavorable bone tissue ingrowth, stress shielding, and less load on human bones, so as to reduce weight and Stress shielding, comfort-enhancing effect

Pending Publication Date: 2022-04-01
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface of the traditional solid metal acetabular cup is dense metal, which is not conducive to the ingrowth of bone tissue
Moreover, the traditional solid metal acetabular cup will produce a stress shielding effect after being implanted in the human body, resulting in less load on the human bone

Method used

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  • Alloy bone trabecular acetabular cup with gradient porosity and manufacturing method thereof
  • Alloy bone trabecular acetabular cup with gradient porosity and manufacturing method thereof
  • Alloy bone trabecular acetabular cup with gradient porosity and manufacturing method thereof

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Embodiment 1

[0025] Such as figure 1 As shown, an alloy trabecular acetabular cup with gradient porosity, including a trabecular structure array filled with trabecular layers on the surface of the acetabular cup; the trabecular structure array consists of more than one trabecular structure Composition; the trabecular bone layer on the surface of the acetabular cup is divided into regions according to its stress range, and each region is filled with the corresponding porosity of the trabecular bone structure according to the requirements of the compressive strength; the porosity of the trabecular bone structure is controlled by the diameter of its struts. The trabecular bone structure on the surface of the acetabular cup is made of Ti6Al4V alloy. The diameter of the struts of the trabecular structure is between 125 and 250 μm, and the porosity can be adjusted within the range of 60% to 90%.

[0026] The porosity of the trabecular structure on the surface of the acetabular cup presents a gra...

Embodiment 2

[0028] A method for manufacturing an alloy trabecular acetabular cup with gradient porosity, comprising the following steps:

[0029] Step 1: Simulate the stress distribution of the trabecular layer on the surface of the acetabular cup: establish a total hip prosthesis model, and perform finite element simulation on more than one transient load in a complete gait cycle; obtain the stress of each transient Cloud map; superimpose the stress cloud map of each transient state to obtain the stress distribution map of the trabecular bone layer;

[0030] Step 2: Divide the trabecular bone layer area: obtain the stress interval of the trabecular bone layer from the stress distribution diagram of the trabecular bone layer, and divide the trabecular bone layer into areas according to the stress interval;

[0031] Step 3: Determine the safety factor of each region of the trabecular layer: determine the safety factor of each region of the trabecular layer according to the maximum stress o...

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Abstract

The invention discloses an alloy bone trabecular acetabular cup with gradient porosity and a manufacturing method of the alloy bone trabecular acetabular cup. The bone trabecula layer on the surface of the acetabular cup is divided into areas according to the stress interval, and bone trabecula structures with different porosities are selected to fill the areas according to the requirements of compressive strength; the porosity of the bone trabecula structure is controlled by its strut diameter. The manufacturing method comprises the steps of simulating an acetabular cup surface bone trabecular layer stress distribution diagram, dividing acetabular cup surface bone trabecular layer areas, determining the safety coefficient of each area of the surface bone trabecular layer, testing the corresponding relation between the compressive strength of a bone trabecular structure alloy compression test piece and the porosity of the bone trabecular structure, and determining the porosity of the bone trabecular structure. And filling the bone trabecula layer on the surface of the acetabular cup with the bone trabecula structure. The bone trabecula layer is filled with the bone trabecula structure with the corresponding porosity according to the stress requirement of the bone trabecula layer on the surface of the acetabular cup, so that high mechanical property and high biological property of the acetabular cup are organically combined together.

Description

technical field [0001] The invention relates to an alloy trabecular bone acetabular cup and a manufacturing method thereof, in particular to an alloy trabecular bone acetabular cup with gradient porosity and a manufacturing method thereof, belonging to the technical field of orthopedic implants manufactured with additive materials. Background technique [0002] The hip joint is a ball and socket joint that connects the lower limbs and the trunk of the human body. It is one of the largest joints in the human body. However, the lesion rate of the human hip joint is relatively high. Many diseases such as femoral head necrosis, osteoarthritis, hip joint dysplasia and femoral neck fracture, etc., the human body cannot heal itself. Patients need to undergo total hip replacement surgery, using artificial hip joints The prosthesis replaces the human hip joint. The acetabular cup is an important part of the total hip prosthesis. Since the acetabular cup directly affects the postoper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/34
Inventor 张永弟王宗瑜王宗玮杨光秦志英
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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