A bad odor on the tongue is often caused by the fermentation of food particles by anaerobic gram-negative bacteria in the mouth. This process produces volatile sulfur compounds such as hydrogen sulfide and methyl mercaptan, which are also associated with periodontal disease. So, why does a white-coated tongue still have a bad odor even after thorough cleaning?

Baby teeth and permanent teeth are two completely different types of teeth, but they are closely related. These two types of teeth are often difficult to distinguish because most baby teeth are eventually replaced by permanent teeth, although there are some teeth that grow in without replacing baby teeth. So, what exactly are baby teeth and permanent teeth, and how can we tell them apart? This article will help you understand these two types of teeth more clearly.