I am not "vouching" for this outfit, but everything reads like it should; they're using state of the art equipment (more modern than MANY offices in the USA...) and it reads well. Too, emails are fast, prompt, and address your questions:
http://dentalinstitutecr.com/
"Each crown is in zirkonia $450 USD. I do pain free work but I do not have nitrous I havent have any patient complain about pain. I will take x rays here in my office since I use digital x rays. If you pay cash there is a 4.75% discount"
from doubting Thomas, Steven1: "That is $450 COMPLETE.....preparation; construction of crown; and fitting? Not familiar with zirkonia....perhaps zirconia? Not porcelain? Is porcelain more expensive?"
"Yes it is all the crown prep temp and final crown. If you need a post and root canal it is extra. Post are betwen $95 and $120 USD and root canal betwen $180 to $250 USD deppending on the tooth it is It is a full porcelain crown made with a sistem call Zirkon Zahn."
http://www.zirkonzahn.com/
Pricing was done in late 2007