While there are several over-the-counter products available that can temporarily fill a cavity or minor tooth damage until you can visit a dentist, they are not a permanent solution and cannot replace a professional filling. It is important to note that a cavity represents permanent tooth damage that requires cleaning, preparation, and filling by a dental professional. Failing to address dental decay can pose severe risks, including tooth loss and abscess formation. Therefore, it is essential to seek professional dental treatment as soon as possible.