Just out of curosity, do you still have the splinter and will it fit back exactly where it came from. Pearl is probably right but I've seen epoxy and few overlays go a long way.
My guess is, even if you can get it back to original The limb is going to twist into the weak spot in such a way the normal untwisting methods won't work.
There will also be the joy of knowing a catastrophic failure may severly injure yourself or a nearby friend.