I am surprised that Dr. Lewallen pioneered a hip replacement made from tantalum. Did he work on the material or did he already use an existing product and found a new use for it? I will say that my experience with Dr. Lewallen was very negative. My case was complex and my care was not adequate. Without going into the details, I had to go and see an Orthopedic Surgeon at the Hospital For Special Surgeries to get the care that Mayo Clinic and Dr. Lewallen lacked in my case. I am pleased that they cared that this patient had even legs. My uneven legs were causing a lot of my pain. I did not find out that my legs were uneven until I starting receiving care somewhere else. What I learned from Dr.Lewallen, the Office of Patient Affairs and the Chair of the Orthopedic Surgery Department, is that the patient is not first and the Mayo motto is only a marketing tool.