I whitened my teeth a couple of years ago. Now I’m about to get a dental crown and want to touch the teeth up before having the crown made because they’ve picked up some stains since then. My dentist said he doesn’t know how to advise me so I’m turning to your blog in the hope you can. Here are my questions: 1. How long should I whiten per day and for how many days? 2. Is a waiting period necessary between whitening and getting a crown?
Brooke
Dear Brooke,
I am going to answer your questions. However, first I am going to express concern that your dentist seems unable to do so. As your dentist, he (or she) is actually in a better position to give definitive answers because he knows your dental history.
The fact that he can’t, gives me concern about his ability to create a beautiful looking porcelain crown for you. Most dentists are engineering-minded. They can create a well-fitted, functioning crown but the appearance will be mediocre at best.
My guess is this is a tooth that is visible when you smile. This makes it all the more important to know if your dentist is a skilled, artistic cosmetic dentist.
Basic Teeth Whitening Guidelines
The duration of days will depend on how long it takes you to get to the level of whiteness you want. Teeth will get whiter the longer you use the gel. As for how much per day, it depends. The minimum you should wear your whitening trays, with the gel in them of course, is 20 to 30 minutes. That’s about the amount of time necessary for the ingredients to get into your teeth.
If you’re able, teeth whitening is more effective overnight. This is because our saliva production goes down at night. During the day, saliva gets into the trays and can dilute the gel. However, I would not whiten to the point of tooth sensitivity. You are the best gauge for that.
You will want to wait a week or two between the time you complete your teeth whitening and you have your porcelain crown made. If it is going on a front tooth, wait the two full weeks. If the crown will be more toward the back, one week is sufficient.
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