Currently, over 2.5 billion people or over 36% of the world’s population suffer from some sort of tooth decay in their permanent teeth. All adults will have dental cavities at some point in their life. Dental cavities are more common in the developed world and less common in developing countries simply because sugar consumption is higher in developed countries. Dental cavities are very common, but what do we know about preventing them? Here is a breakdown of the 8 ways to prevent tooth decay.