To maintain fillings, you should follow good oral hygiene -- visiting your dentist regularly for cleanings, brushing with a fluoride toothpaste, flossing and using an antibacterial mouthwash at least once daily. If your dentist suspects that a filling might be cracked or is "leaking" (when the sides of the filling don't fit tightly against the tooth, this allows debris and saliva to seep down between the filling and the tooth, which can lead to decay), he or she will take X-rays to assess the situation. If your tooth is extremely sensitive, if you feel a sharp edge, if you notice a crack in the filling, or if a piece of the filling is missing, call your dentist for an appointment.

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