eu222, this qn is not as interesting as your previous one ...
The answer - the amount of crusing really depends on the post-op care the patient follows. Some docs want you to keep spraying saline often on the transplanted area to keep crust formation at bay. On the other hand, Dr. Rahal patients baby their crusts for the longest time. Most docs will advise you to gently rub on your scabs from day 4 onwards while washing your hair. If you do this properly, usually scabs will all fall of by days 7-10. Just use your finger tips and not your nails. After a couple days, the grafts are very secure and gently rubbing on them after 4 days will not cause them any harm.