3D printed spine mimics bone

Stryker’s Spine division, Allendale, N.J., introduces the Tritanium Posterior Lumbar Cage, a 3D-printed intervertebral body fusion device made of Tritanium, a highly porous titanium alloy designed for bone in-growth and biological fixation.

How to Dig a Trench for a Pipeline

A chain trencher resembles a huge chain saw, except that it cuts through earth and granite to form trenches for pipelines that could be six feet wide and hundreds of miles long.