While I was rehabbing and on disability from my surgery, I didn't know if I was ever going to come back, if it was worth the risk, or how I would train if I did decide to train again.
When the time came and the doctors gave me the go-ahead, like Adam said, I knew what was right for me.
I was extremely conservative when I started training again. A few months later I'm doing things I never did before my accident. However, I definitely avoid similar risks, and I have a new respect for the potential consequences of every action.
You'll know what's what better than anyone else and you will make the right decision.