Firstly mate I'm really sorry to hear of your injury to your hand. If its any comfort I had an accident back in 2000 when I had close to half of 3 fingers crushed off my left hand by some hydraulic rescue equipment. It took a while, maybe 2 1/2 to 3 years but I discovered (by accident, noodling in a music shop) that I could still play reasonably well. And with a bit of practice and adapting my left hand technique I now play Bass better than I did before. I don't know the extent of your injuries but I do know that its possible to overcome some pretty serious injuries. There's a guy on you tube (Bill Clements) who lost his right arm and he still plays (very well as it happens). I guess its like anything in life, if you want it badly enough you will succeed.
Stay positive and good luck.