Cavity Treatment depends on how severe it is and your particular situation. Cavity Treatment options include:Fluoride treatments- If your cavity just started, a fluoride treatment may help restore your tooth's enamel and can sometimes reverse a cavity in the very early stages. Fillings- Fillings, also called restorations, are the main treatment option when decay has progressed beyond the earliest stage. Crowns- For extensive decay or weakened teeth, you may need a crown — a custom-fitted covering that replaces your tooth's entire natural crown. Root canals- When decay reaches the inner material of your tooth (pulp), you may need a root canal. This is a treatment to repair and save a badly damaged or infected tooth instead of removing it and Tooth extractions-Some teeth become so severely decayed that they can't be restored and must be removed.