My implants were done by a non-Mayo hand surgeon from Marshfield WI (Steven Sanford). The implant is called Stablyx but I would recommend the Biopro implant because it is more of a ball and socket. With the Biopro, you're getting two brand new surfaces, free of arthritis and defects. The Stablyx only provides a new "ball". I am coming up on three years for both thumbs. They healed equally well. Strength is 90%. I have permanent, low-grade numbness in both index fingers. I'd do it again but with Biopro. I'm 62. The Mayo Clinic system is amazing and by far, my first choice for all major surgeries. I had prostate surgery about a year ago and Mayo treated me extremely well. They have nice hotel accommodations attached to the clinic so you never have to even go outside. Dr. Steven Moran M.D. is a good first option for a hand surgeon. I can help you more with the info if you need help.