The best method for treating tooth decay depends mainly on how far the decay has advanced. If you have a tiny spot where a cavity is just beginning, then it’s possible (ideal, even) to reverse the decay by changing your diet and improving your oral hygiene. For example, we might recommend a professional fluoride application to help strengthen compromised enamel. Fluoride is a mineral that reinforces tooth enamel and it can help you keep your teeth strong so that they don’t need treatment. But if the decay has taken root, then you may need a small filling to stop the rot. If your tooth has developed a large cavity, then it may need to be restored with a crown. A root canal is necessary if the cavity has reached the nerve of your tooth or triggered a dental abscess. And if it looks like your tooth is too far gone, then you may need to consider having it replaced with a restoration such as an implant or dental bridge.