Many adults would like straighter teeth. Overcrowded or gappy teeth can cause a range of problems, including difficulties with biting and chewing and keeping your teeth clean. Your self-confidence may be affected, and you may hide your teeth when you smile.
Teeth naturally yellow and discolour over time, but smoking and some food and drinks can also cause hard-to-shift stains. Teeth can also be discoloured with speckled enamel, white banding or coloured spots, and can be stained during development by tetracycline, a broad-spectrum antibiotic.