I was planning to do a Zoom Whitening first before I get a crown for my front tooth. But today, the dentist didn't have the Zoom kits in stock and was doing a temporary crown for my tooth without telling me before hand. I am not happy at all about this.

He told me that I can come back next Tuesday to do the Zoom Whitening and also measure the color of my teeth for my permanent crown in the same day. I thought that you have to wait for 2 to 3 weeks for the color of your teeth to stabilize first then get the crown. Please help