Chinese hospital implants additively manufactured tantalum knee joint

November 30, 2017

Chinese hospital additively manufactures tantalum knee joint

An AM tantalum implant was used to fill defects in an 84 year old man’s knee (Courtesy China Global Television Network)

 

A hospital in Chongqing municipality, China, has become what is believed to be the first in the world to perform a ‘knee revision’ surgery using a metal additively manufactured joint, reports China Global Television Network. In the surgery, an eighty-four year old man with severe arthritis had large sections of the bones in his knee replaced with tantalum implants.

With the incidence of arthritis among people aged 50-59 now at 62%, the hospital stated that it performs roughly four-hundred knee replacement surgeries annually. However, in conventional knee replacement surgery, bone defects can occur around the joint due to post-operative infections.

In addition, the shape of bone defects varies greatly from person to person; using ‘off-the-shelf’ implants, surgeons are required to take time during the surgery to shape the implant to match the patient. As a result, hospitals have for some time recognised the potential of additively manufactured knee replacements – which allow implants to be custom-shaped to the recipient – with polymer versions having been implanted successfully in the past.

 

Chinese hospital 3D prints tantalum knee joint

According to hospital surgeons, the patient regained mobility a day after receiving the tantalum implant (Courtesy China Global Television Network)

 

This marks the first knee replacement surgery using a joint produced by metal AM. Tantalum is typically used in dental and surgical implants; for this implant, porous tantalum was used, to allow future bone in-growth.

According to the hospital surgeons, the patient regained mobility a day after receiving the tantalum implant and was expected to be discharged from the hospital in just four to five days.

 

Metal AM magazine Summer 2022

In the latest issue of Metal AM magazine

Download PDF
 

Extensive AM industry news coverage, as well as the following exclusive deep-dive articles:

  • Transforming access to medical implants with PrinterPrezz
  • Lessons from 2021’s Olympic bike crash
  • Xerox liquid metal AM
  • Additive Manufacturing for oil, gas and maritime
  • Multi-material metal parts by Powder Bed Fusion
  • Findings from Wohlers Report 2022
  • The challenge of grain size: X-ray powder diffraction analysis of parts made by metal AM

The world of metal AM to your inbox

Don't miss any new issue of Metal AM magazine, and get the latest industry news. Sign up to our twice weekly newsletter.

Sign up

News from the industry…

    News from the industry…

    Discover our magazine archive…

    The free to access Metal Additive Manufacturing magazine archive offers unparalleled insight into the world of metal Additive Manufacturing from a commercial and technological perspective through:

    • Reports on visits to leading metal AM part manufacturers and industry suppliers
    • Articles on technology and application trends
    • Information on materials developments
    • Reviews of key technical presentations from the international conference circuit
    • International industry news

    All past issues are available to download as free PDFs or view in your browser.

    Browse the archive

    qweqw

    Looking for AM machines, metal powders or part manufacturing services?

    Discover suppliers of these and more in our comprehensive advertisers’ index and buyer’s guide, available in the back of Metal AM magazine.

    • AM machines
    • Process monitoring & calibration
    • Heat treatment & sintering
    • HIP systems & services
    • Pre- & post-processing technology
    • Powders, powder production and analysis
    • Part manufacturers
    • Consulting, training & market data
    Download PDF
    Share via
    Copy link
    Powered by Social Snap