Just follow your OS/Pts instructions. Theyll tell you when to ditch your crutches, brace, etc. Usually you go from brace and two crtuches, to walking with one crutch & brace, to walking without a crutch & just the brace, to walking without the brace. If youve had meniscus work done as well, its not uncommon to have the brace locked for 4 wks while the meniscus heals up. The key is to start putting weight on your leg (even if using crutches and a brace), icing, etc....