In reply to Fringe:
In reply to Fringe:
I don't have personal experience of this injury, nor do I know what surgical outcomes are like these days, but I used to be a physio so - to the best of my knowledge - here are the implications. I'm also not sure what you already know so apologies if I'm teaching you to suck eggs.
If it's completely ruptured (i.e. torn into two separate bits), then it won't re-knit without being sewn back together, since the FDS muscle will pull the tendon-half that's still attached to into your wrist away from the tendon-half that's still attached to your finger.
Bodies are jaw-droppingly good at adapting to these sorts of things, but without FDS you're unlikely to regain full strength of the specific movement of bending the middle knuckle of the middle finger (as you do in crimping, for instance).
Your other finger tendon, FDP, can do this movement too, but, since its purpose is really to do other things, it isn't as effective at producing this particular movement. You'll have to develop a super-strong FDP.
In terms of supporting it: of course - you don't need to protect FDS as it's gone, but you probably should go to great pains to protect both FDP and your other finger FDS tendons.
Everything open-handed, and I'd be inclined to do some controlled OH work over the next year on a fingerboard, to encourage FDP tendon strength.
You can always tape the middle knuckle of say, your ring finger, straight to protect its FDS if you feel it's getting a bit tweaky.
Hope this helps.