Dr. Mark W. Hollmann specializes in the following Orthopedic areas: Hip, Joint Replacement & Revision, Knee, Sports Medicine. He has performed more total knee replacements than any other surgeon in Central Florida. Dr. Hollmann leads the way as one of the most experienced joint replacement specialists in the Greater Orlando area. He was the first surgeon in the area to perform the Makoplasty® robotic partial knee replacement - also known as Roboknee.