Method for conducting laser shock micro-shaping on titanium alloy artificial acetabular cup

Abstract

The invention discloses a method for conducting laser shock micro-shaping on a titanium alloy artificial acetabular cup. The method includes the following steps that (1) the region prone to wear of the bottom of the titanium alloy acetabular cup is polished, cleaned with alcohol and dried, and a layer of black paint is sprayed on the region prone to wear to serve as an energy absorption layer; (2) the titanium alloy acetabular cup is arranged on a workbench, parameters of a laser device are set, and the region prone to wear of the bottom of the titanium alloy acetabular cup is irradiated with laser beams through a focusing lens, and micro pits are formed; (3) micro pit arrays are machined in the bottom face of the titanium alloy acetabular cup through the laser device by moving the workbench; (4) the black paint on the surface of the titanium alloy acetabular cup is removed, and the micro-shaping surface is cleaned through ultrasonic waves. According to the method, the adopted laser shock micro-shaping technology belongs to cold machining surface treatment, no other chemical components need to be introduced, and no side effect on people exists; compared with current artificial acetabular cups, the wear resistance of the bottom of the titanium alloy artificial acetabular cup obtained through laser shock micro-shaping is improved remarkably.

Description

technical field [0001] The invention relates to a method for laser shock micro-modeling titanium alloy artificial hip joint cup, which belongs to the field of medical orthopedic implants. Background technique [0002] The Chinese population has gradually entered the aging stage. With the aging of the human body and the impact of various diseases and trauma on the human hip joint, some or all of the hip joint function will fail, resulting in severe restrictions on the patient's mobility. To solve this problem in modern medicine, surgery is usually used to replace artificial joints, which is called artificial joint replacement. This method can not only completely eliminate the joint pain, but also restore the normal function of the joint, so that the patient can easily engage in daily activities and participate in normal life and work. [0003] Most of the activities of the human body are inseparable from the hip joint, which is one of the joints with the largest load. For ex...

AI Technical Summary

Problems solved by technology

Most of the traditional medical titanium alloy modification technologies use chemical or heat treatment processing methods, such as the artificial hip joint cup and socket of Shanghai University Hua Zikai (patent number: 201310057757.X), the processing conditions are harsh, and the chemical treatment method may disease causing human tissue

The coating is prepared on the surface of the material by plasma spraying technology, which can effectively reduce the surface friction coefficient, but the bonding strength with the substrate is not high and it is easy to crack

The modified layer is prepared by ion implantation technology to improve the wear resistance, but the abrasive particles produced may contain chemical elements that are harmful to the human body and cause lesions in the surrounding tissues.

In addition, once the artificial hip joint is implanted into the human body, the hip joint cannot move normally due to the above-mentioned defects, and the patient needs to undergo a second operation, which will bring severe pain and expensive medical expenses to the patient. Therefore, medical titanium alloy artificial The wear resistance of hip joint acetabular cup needs to be solved urgently

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