He told me he doesn't fill a tooth until the machine reads that there is zero mercury vapours and it takes time. He does seem really thorough, but he doesn't believe in diamondlite and he has a money back garantee if you dont get well. I worked it out its going to cost £600 for 2 small fillings, i have already paid out loads of money already. Im not keen on the concious sedation bit costing £150.