Partial knee replacements that are done for the right reasons can last a lifetime. Patients who are heavier, have a higher activity level, or have arthritis in other areas of their knee are at a higher risk for failure. At 10 years, 90% of partial knees done with historical techniques are still functioning well. Using robotic assistance, surgeries are able to have their implants placed in better positions, and the longevity approaches that of total knees, while maintaining the improved kinematics from a partial knee.