Teeth Whitening + Smoking Q&A

I have found the same question, but the answer wasn't definitive enough. I'm worried that if I smoke even an hour after I use the gel (it says to do so for 20 minutes) my teeth will instantly go completely yellow again, or be even worse because of the enamel sensitivity. I would like to know if it gradually reverses the effects of the gel (like it gradually strained the teeth in the first place) or instantly? If instant, how long should I wait for this sensitivity to go away?

I want to whiten my teeth will it help me now?

I've seen a couple of videos and they only seem to do the front ones? As a smoker of 10 years all of mine need whitening, do I have a choice or..?

Hello, i have yellowish teeth. I am a smoker. Please answer

I bought a at home teeth whitener and i was wondering how long after you do the whiting do you have to wait to smoke a ciggerette? The process is only 30 mins but i dont wanna make my teeth more yellow then they already are

I am going to get my teeth whitened for the first time after my dental exam on August 3rd, 2015 and would like to know how long I should wait to smoke or even eat after I get them whitened? Please and Thank you! :)

I've had porcelain crowns for 12 years.They have become stained due to the fact I smoke.Are there any solutions to cleaning them or will I have to have them remove?