Doing crowns in the offie is a different animal. Much like "teeth in a day" it's kind of a lie. I get that a businessman wants to keep his down-time to a minimum. One visit crowns are great. A lot of people don't realize the amount of their day that will be eaten up waiting for it to be finished. Most have had a prep done, waited a couple of weeks and then had the crown inserted. Now they get to wait. Those people are the same ones who can be really pissy to the staff. The doc is in his office, or doing prophy checks to keep the money and his day going. I have an acct that does in-house singles. We get a lot of the other, bigger cases. They like what we do and when they are busy they may now send their scanned, designed crowns to us and we will process the files, mill, sinter, stain & glaze for them with no model...and no liability for contacts or occlusion. They've done the design work, all we're doing is providing a crown to seat. We can also do it for a fee that allows us to make money and they still think they are ahead of the curve making money on in-house work.