While a cosmetic procedure like tooth whitening is included in aesthetic dentistry, the field is mostly concerned with orthodontic treatment, which involves teeth straightening and restorative dentistry, which involves the insertion of crowns and veneers and dental implants.
While you can buy over-the-counter, use-at-home toothpastes and strips, your dentist is best qualified to determine if you need teeth whitening. They can diagnose the reason for the discolouration and its type, and can then advise the most effective treatment for you.
You may be tempted to go to a shopping centre booth or a beautician to get your teeth whitened, but neither are staffed by suitably qualified personnel. Incorrect use of bleaching agents may cause irreversible damage to your teeth and gums. DIY bleaching comes with all sorts of risks, and anecdotal treatments such as rubbing strawberries, lemons, or even bicarbonate of soda on your teeth, can do a lot of damage to your teeth and gums for no real whitening gain.
Keep in mind is that crowns, veneers and fillings don’t change colour when you have your teeth whitened.