Knee resurfacing is a new, less invasive surgical treatment option for patients with mild knee arthritis that allows them to keep more of their bone and cartilage while maintaining knee function.   Osteoarthritis or arthritis is the most prevalent cause of chronic knee pain in people over 50, which usually affects women more than men. A femur or thigh bone has two different surfaces called condyles that sit on the tibia or shin bone, forming two compartments. A third compartment is located behind the knee cap