Hi
I have had both procedures done on my left knee and the unispacer surgery was painful for the first couple of weeks, where the pain after the osteotomy surgery lasted for months.
I am 10 weeks post op from the unispacer surgery and it was definitely less painful and I was only on crutches for 5 weeks compared to 12 with the osteotomy. I was weight bearing after the unispacer and non weight bearing for months after the osteotomy.
After having been through both procedures I feel the unispacer was the easier of the two.
I hope this help, if you have any other questions or concerns let me know.
Take Care
Theresa