Cosmetic dentistry is generally used to refer to any dental work that improves the appearance (though not necessarily the function) of a person’s teeth, gums, and/or bite.

Cosmetic dentistry may involve:

1. – the addition of a dental material to teeth or gums – examples: bonding, porcelain veneers (laminates), crowns (caps), gum grafts
2. – the removal of tooth structure or gums – examples: enameloplasty, gingivectomy
3. – neither adding nor removing dental materials, tooth structure, or gums – examples: teeth whitening (bleaching), gum depigmentation
4. – straightening of teeth accompanied by improvement in the appearance of face – Orthodontics

Source: Wikipedia