A. A partial plate usually can be relined if it is of the plastic variety.  A metal ( chrome cobalt)  plate usually cannot be relined.  If this is the first time you have worn a plate there is often a period of adaptation tothis new appliance.  Following eating you should rinse your plate to remove any debris.  The seal around your plate may improve with time – if this is not the case please discuss the matter further with your dentist.