Knee replacment surgery
Not that it matters or directly impacts efficacy one way or the other, but I thought I'd point that out as there is a certain popular of people out there that have an avian allergy of some sort and would want to avoid products derived from birds.
Ask about intra operative injection for pain control. There are different injected "cocktails " but they all help pain 1st 2 days.
I know of 3 brands of knee replacements, Depuy, Zimmer, & Striker but I'm sure there are others out there. I have a Striker. Most replacements are made of either Titanium or Chromium Cobalt & weigh about 4 lbs. Had mine done at Community memorial Hospital in Menomonee Falls by Dr. John konkel & all went very well. Yes, there is pain but believe me its well worth it! Just do ALL the physical therapy they tell you to do & at least 10-15% more, as the more you do them the more range of motion you get back.
You'll have to wear surgical stockings for a while which look silly but DO use them as they prevent blood clots which are very serious.