I've noticed that teeth have white spots on them. What are they, why are they there and how can I remove them?
White spots can be due to intrinsic or extrinsic factors. Examples of intrinsic are Hypoplasia (poor formation of the tooth structure) or flourosis (too much flouride uptake into the tooth struture during formation). Extrinsic could be due to uneven bleaching/whitening of the teeth. If the intrinsic defects are superficial, simple tooth-coloured fillings can correct the situation. More severe problems need crowning (a cap over the tooth). Depending on what the extrinsic factors are, corrections are to reduce or stop the problems like stop or maybe bleach even more to even things out!