Here’s everything you need to know about teeth whitening: – College of Dentistry

The teeth are like a sponge
Teeth have pores like skin, so everything that touches your teeth will leave a mark. Food and drinks such as coffee and berries, and daily habits such as smoking will negatively affect your teeth over time.
Teeth whitening is not harmful
If you are careful about what you use and take the advice and directions of professionals, you will be able to whiten your teeth safely.
Method is the secret
You will find many different methods of teeth whitening in the market today, but you need to make sure that the device that you will use is suitable for your teeth, so do not use anything without consulting a dental professional.
Teeth sensitivity is normal
Teeth whitening temporarily dries out the teeth, so it is perfectly normal for your teeth to feel sensitive for a day or two.
Getting rid of yellowing of the teeth takes time
If you have been smoking or chewing tobacco for a long time, you will notice that your teeth have turned yellow and the more severe the discoloration, the longer you will have to wait to whiten the affected teeth, so be patient.
You cannot bleach veneers
Since this part is made of a different material than natural teeth, whitening products will not work.
Bedtime is the best time
If you use a home whitening product, apply it before bed to reduce the chances of any traces of staining on your teeth while the whitening granules are in action.
Perfection is a myth
Bright white teeth are almost unnatural and bleaching helps remove stains but teeth should not be bleached to an unnatural color.