By Stephen Beech

A new 3D printing “glue gun” can generate bone grafts directly onto fractures.

The revolutionary device has already been tested in animals.

Now, researchers in South Korea are preparing for human trials.

They developed a tool made from a modified glue gun that can 3D print bone grafts directly onto fractures and defects during surgery.

It has already been tested in rabbits to quickly create complex bone implants without the need to make them in advance.

The researchers "optimized" the 3D-printed grafts for high structural flexibility, release of anti-inflammatory antibiotics, and promotion of natural bone regrowth at the grafting site.

Bone implants have previously been made of metal, donor bone, or even more recently, 3D-printed material.

But in cases involvin

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