From Boston.com:
Dr. Christopher Geary, an orthopedic surgeon at Tufts Medical Center who has not treated Pedroia, described this type of operation as “a much bigger procedure’’ than anything Pedroia has had to this point.
“If he was 16, they do either knee replacement or a partial knee replacement,’’ said Geary. “But because of his age [35], there’s a relatively newer technique where they take what’s called a mega allograft. They take it from a cadaver and plug it in where the cartilage is no good.”
https://www.boston.com/sports/boston-red-sox/2019/08/07/dustin-pedroia-knee-surgery-2
It goes on to say that this is a day to day living procedure, not a get back to playing sports procedure.