My dad had just had a mass of bridge work done. He was really worried about being left with gaps in his teeth whilst the false ones and caps were being worked on, but our wonderful dentist had already made a temporary bridge so he didn't look like a gammy fool...and for no extra cost! Okay, our dentist is a perfectionist, but this makes me think that this might not be a UK/US issue, but a dentist to dentist issue.
I'd get a second opinion, and be a wee bit more assertive. Ask the options, and explain your fears.
Vicky