1. Original Color.
Each person has different basic color of teeth. There are basically white, but some are not. The color of teeth depends on formation of bone, which basically has a different genetic.
2. Chemicals In Foods or Beverages.
We often do not realize that the food we eat or drink is bad for our teeth color. Especially if we consume constantly, like drinking coffee, tea and soft drinks.
3. Smoking.
This is the worst teeth destruction. Nicotine that contained in cigarettes wil stick to the tooth enamel and cause brown stains. Worse, it is difficult to remove the stains. Not enough with toothbrush.
4. Drugs.
Some chemicals in drugs can also cause tooth discoloration becomes more yellow. If you really depend on the particular drug, it can’t be avoided.
5. Lazy to Clean or Brush the Teeth.
Can you imagine how much bacteria in the mouth, if you rarely brush your teeth? Plaques produced after a long time will accumulated and become a yellowish crust. The teeth become dull and cause very bad smell breath.