Those look like they have a very good chance of recovery. Some people do an iodine dip or similar to try to prevent infection. Personally I try not to unless they start looking worse as it seems to stress them out.
I'm going to leave them then to see if they heal up. They've survived before when I had a big nutrient swing in my tank, basically looked like crusty skeletons then bounced back into big juicy heads.....until today!