What do call a dentist who always keep himself up-to-date?
Is it correct to say a up-to-dated dentist?
Up-to-date is an adjective, so an “up-to-date dentist” is ok, but does not sound that good to my ear.
“up-to-dated” is always incorrect, but “updated” may be used to describe an object - “Do you have a copy of the updated contract?”