dear friend ,
thanx for sharing your concern,
prosthetic crown is placed on tooth for two reasons. one is to help chew, bear the masticatory load, also transmitting the same to the supporting alveolar bone effectively.
next, it is esthetically valuable.
but be sure that this will not cause any referal pain to ear or neck etc.
if this happens there must be some pathology associated with the concerned tooth.
some times if the crown is not placed properly it causes discomfort too . you have to visit your dentist
and get it reexamined.
you have not mentioned, since how long you have been on steriodes and for what ?
the lisp you mentioned can also be due to faulty crown placement, for this occlusion correction has to be done or sometimes the whole crown has to be replaced again.
i suggest you to see your dentist soon .
hope it helps