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Scientists hacked the glue gun design to print bone scaffolds directly into broken legs (and it works)

By MSN.com  
   September 23, 2025

Imagine a surgeon fixing a shattered bone not with screws or plates, but with a device that looks like a craft-store glue gun. Instead of hot glue, it extrudes a custom mix of biodegradable plastic and minerals. These scaffolds fuse to broken bones, release antibiotics, and slowly dissolve as the body heals. This new invention, known as a portable 'in situ bone printer,' bypasses the months-long process of designing and fabricating bone implants outside the body.

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