The 3D printing manufacturing method of tantalum coating multi-hole POLYEther ether ketone artificial bone scaffold is as follows: firstly, CT scan the bone tissue at the injured part of the human body, and the tissue structure of the symmetrical part of the bone tissue at the missing part can be scanned. The image data of the injured bone is obtained and imported into THE Mimics software to establish the 3D bone model of the specified part of the human body. Generate motion track code through 3D printing system control software; The 3D printing system was used to print the POLYEther ether ketone artificial bone scaffold until the whole manufacturing process of the artificial bone scaffold was completed. The dried artificial bone scaffold was put into the sputtering chamber of the magnetron sputtering apparatus and glued to the loading platform with silver glue. Tantalum coating was coated on the artificial bone scaffold by magnetron sputtering technology. After the tantalum coating is finished, the sputtering chamber is deflated, the artificial bone scaffold is removed, and the tantalum coating multi-pore polyether ether ketone scaffold is disinfected to complete all steps. The invention makes artificial bone scaffold by 3D printing, so that the scaffold made is harmless to human body.
Tantalum metal has no cytotoxicity, organisms are inert, has good biocompatibility, high biological activity, the use of history can be traced back to the middle of the 20th century, at that time, a lot of medical equipment has been made of this material such as metal plate used in the skull plasty, tantalum metal implants are widely used in orthopaedics, facial, etc.
The pore structure of artificial bone scaffold is limited by the processing method, so it is impossible to make a deep multistage pore structure with gradual porosity. 3D printing technology can be used to create a highly complex heterogeneous multistage pore structure that is consistent with the microstructure of human bones, ensuring the connection of pores and the adjustable porosity. The manufacturing process of the existing artificial bone scaffold involves high temperature and high pressure and uses a large number of organic solvents. However, using 3D printing technology to print the scaffold made of polyether ether ketone can avoid these shortcomings and ensure the safety of artificial bone scaffold implantation in human body.
