Latest in Science

Image credit:

Researchers develop a polymer sponge to repair broken backs

It automatically grows into the correct size and shape once implanted.
18 Shares
Share
Tweet
Share
Save

Sponsored Links

Researchers at the Mayo Clinic have developed a novel spinal graft that automatically "grows" to the requisite size and shape when implanted. The spongy polymer isn't meant to be a formal replacement like the 3D printed neck bones recently installed by a team from the Prince of Wales Hospital in Sydney. Instead, it's designed to act as a bone graft -- a biodegradable scaffold through which a cancer patient's own bones can regrow after surgery.

See, for whatever biological reason, when cancer metastasizes -- that is, when it spreads through the body from the original tumor -- it predominantly tends to settle in the spinal column. Doctors can cut out the infected bone tissue (or flat-out replace it as they did in the Sydney case) but that leaves large gaps in the spine. Normally, doctors would either have to open the chest cavity and access the spine from far side (which entails a lengthy recovery and high probability of complications) or they'd make a small incision in the neck/back and inject expandable titanium rods into the bone gap (which is super expensive because titanium). This new technique combines the easy access and short recovery of the titanium rod method with the low cost of the open chest operation.

Doctors simply cut a small hole in the patient's neck/back and inject a hydrogel polymer into the bone gap much the same way they would a titanium rod. This polymer absorbs fluids from within the wound and grows to fill the gap. Doctors control how far the polymer expands in any specific direction by first inserting a "cage" -- basically a pre-expanded shell that the polymer fills in as it spreads. Think of it as the wooden frame that keeps a freshly-poured concrete sidewalk in place until it hardens. Once the polymer fills in the cage, which takes 5 to 10 minutes on average, it will set and harden into a viable prosthetic. From there, surrounding bone tissue grows into and through the polymer, reinforcing and cementing it in place.

The Mayo team plans to begin initial cadaver-based tests of the new method in the coming months. Should those succeed, trials on living people will follow in the next couple of years.

All products recommended by Engadget are selected by our editorial team, independent of our parent company. Some of our stories include affiliate links. If you buy something through one of these links, we may earn an affiliate commission.
Comment
Comments
Share
18 Shares
Share
Tweet
Share
Save

Popular on Engadget

Engadget's 2019 Back-to-School Guide

Engadget's 2019 Back-to-School Guide

View
Bloomberg: Apple plans to launch TV+ in November for $10 a month

Bloomberg: Apple plans to launch TV+ in November for $10 a month

View
Amazon unveils trailer for third season of ‘The Marvelous Mrs. Maisel’

Amazon unveils trailer for third season of ‘The Marvelous Mrs. Maisel’

View
San Francisco’s 25-year-old FogCam shuts down this month

San Francisco’s 25-year-old FogCam shuts down this month

View
You can finally get PowerBeats Pro in colors other than black

You can finally get PowerBeats Pro in colors other than black

View

From around the web

Page 1Page 1ear iconeye iconFill 23text filevr