Computers are making it easier for surgeons to achieve a near-perfect fit when it comes to knee replacement surgery.

Tantalum (TAN-tah-lum) is a rare metal used in cell phones and camcorders. The material is now replacing human body parts.

Spinal injury patients who suddenly face life in a wheelchair feel their independence vanish. Learn how 3D computer images and a joystick keeps them free-wheeling.

Find out how Yolanda, a 56-year-old woman with knee and back problems, has overcome injuries to stay strong.

Today, Baby Boomers go to "joint" camp to prepare for hip and knee replacement surgery.