Something patients may not realize is how medications you are taking, can increase your decay. This is because medications cause reduced saliva flow. Reduced saliva flow increases your caries rate, because saliva is very important in washing away plaque and debris to protect your teeth. Bacteria can start a cavity or build tartar in as little as 90 days.
One more important reason to keep your regular hygiene visits, INCLUDING application of Fluoride. Fluoride keeps the "invaders" from going rampant in your mouth.