If I have a crack in my tooth will using whitening products make it worse?

Unfortunately some teeth just doesn’t respond to in-office whitening procedures. After all those various concentrations, I’m afraid you may be one of those patient that will not benefit from whitening. To brighten your teeth, veneers may be the only option.

Thanks for your question. There are two types of staining that darken teeth, extrinsic and intrinsic. Extrinsic stain is on the surface of your teeth and can be removed. For this I always recommend a professional cleaning at a dental office. The cost might be more reasonable than you think,...

I won’t be affected you will be fine, but it’s better to wait because the retraction of the lip can stress muscles in lips

Yes, there can be some discrepancy in the tooth shade from the front to the sides. Also, lighting will not reach the sides of the mouth as much as the front teeth due the lips and cheeks casting shadowing and blocking light. Teeth whitening is an option if you are looking to lighten any of your...

You can anything after whitening. You may want to stay away from foods like red wine, coffee and tea which will stain your teeth again. You may also want to avoid very cold foods, as your teeth may be sensitive to cold foods after a whitening treatment. 

This is one of the issues you see with whitening strips. They don't always align perfectly. Just as the lip sides of the teeth end up one shade and the tongue sides another. With custom whitening trays and gel it's usually not a problem. It will probably fade enough that it won't be that noticeable.