Dentists can use different methods to fix bad teeth depending on the issue. But the most common treatments for the same are fixing cavities and restoring teeth with minor tooth decay, capping teeth with a crown in case teeth are chipped or weakened, removing the infected pulp, cleaning the canal and sealing the pulp chamber in root canal treatment, replacing lost teeth with restorative tooth roots in dental implants other than few more methods like Braces and Orthodontics, Teeth Whitening, Veneers etc.