Welcome to another edition of the MedPage Today Tweet of the Week! Every Friday, the editorial team highlights its favorite 140-character contribution from the healthcare twittersphere.

This week's winner is ... Jonathan Jeckell, a U.S. Army officer with a background in physics. He shared this article about new 3D-printed tissue created in China that could be used to replace the sliced dura mater during brain surgery.

Chinese company makes new bioprinted protective layer for brain surgery http://t.co/CQEN6DuPug pic.twitter.com/tm94wzuluw — Jonathan Jeckell (@jon_jeckell) July 21, 2015

On the topic of 3D-printing, our runner up is Ultimaker, a 3D-printing company. They shared this video of a 3D-printed organ model emerging from their machine. They're being used to teach medical students how to interpret MRI scans.

3D printers are changing medicine. Watch this #3Dprinting timelapse of an MRI scanned organ: https://t.co/i49o11vvNu pic.twitter.com/Rl7KS2heUV — Ultimaker (@Ultimaker) July 22, 2015

Thanks for sending your nominations! We want to hear from you. Nominate your favorite tweets by sending an email to editorial@medpagetoday.com.

Past Winners: