I don't understand what you mean by you reacted to beryllium , formaldehyde etc . All of these substances are toxic to everyone and there is no need to test them for allergic reaction . They are poison regardless of whether you have an allergic reaction. Porcelain , composite and ceramic fillings are all different . Ceramics are much less poisonous than composites.Crowns are bad for your teeth , nerves and gums and if you get a crown, you probably wont have that tooth in your mouth your entire life.
Dentists can use lab made indirect ceramics aven for small fillings.