From casual observation dentists and those in the mouth business tend to use the same dinner plates as the rest of us,the same goes for cutlery,however most of my friends(sorry people I know) in this this game have far more money than is good for them,the stuff on the plate tends to be of the caviar and champagne sort rather than egg, two toast variety and a cup of char
You are most likely to see the type of ceramics they use if you look through the windows of such caffs as "THE DUCK" at Bray etc as opposed to Alfs "Chill and Grease" alongside the A1.
Do hope this helps.