Cleaning helps removing the layer of tartar(calculus) and stains. After full mouth cleaning, your cosmetic dentist can suggest you teeth whitening, porcelain veneers or composite bonding for more correction.
Ideally, Teeth cleaning should be done in every six months. The layer of tartar has millions of bacteria and it creates space for bacterias to harbour on the teeth and gums. Gums lose grip on teeth because of these bacterias and not cleaning. Ideally, you should never let layer of tartar to form. Brushing twice a day and professional cleaning in every 6 months saves you from gum problems and cavities.
Cosmetic dentistry can help you achieve the smile of your dreams, you really need to shrug your worries and get your smile rejuvenated.