Took Paul George about 18 months to be 100% again after a similar injury. He played before that but it took him a long time to get 100% again.
What are you using to measure that time frame?
George got injured on 8/1/14 and was back on the floor on 4/5/15, that's about 8 months.
And he was definitely 100% by the start of the 15/16 season, which is about 15 months after the injury.
But since there were no games for George between 4/15/15 and 10/28/16, you really have no idea when he was back to 100%.
Might have been 8 months, might have been 15, definitely wasn't anywhere close to 18 which would be around the '16 All Star break. He averaged 30/8/4 in over November '15 (first full month back), if that's not 100% I don't know what is.