More then 600,000 Total Knee Replacements are done a year in the United States. It is one of the most successful procedures in Orthopaedics. It provides a significant improvement for patients quality of life and therefore is rewarding to preform. As an Orthopaedic surgeon I am always looking for ways to improve upon current treatments. The Mako Robotic-Arm Assisted Total Knee Replacement system has some great advantages.