The mouth is the main organ of mastication, it is where the first step of what will be digestion is carried out, it is also the point of entry to the digestive and respiratory tracts, inside there are many and diverse bacteria, generally innocuous but nevertheless some of these germs can cause diseases. For this reason, the mouth offers signals, including the first ones, about a person's general state of health, on the other hand, problems in it such as cavities or gum disease can affect the rest of the body. An oral cavity is not an isolated entity, it is immersed in a body and is an important part of it.
Oral health not only consists of preventing cavities or periodontal diseases, it is also not only to avoid halitosis or bad breath, to keep teeth white, it is to help maintain good health in general. The main consequences that have been derived from poor oral hygiene have been certain cardiovascular diseases, let's remember that of the hundreds of bacteria that inhabit it, some of them end up in the bloodstream either due to bleeding gums or injuries and open wounds that occur which can cause blood to reach the heart causing endocarditis (inflammation of the heart), some types of aneurysms due to blood accumulation, digestive problems among others.
A harsh taste in the mouth, people refer to metal resemblance, dryness and a persistent bad breath are often signs of kidney diseases, because if the kidneys do not perform properly, as a result of the partial breakdown of proteins they induce these symptoms, which sometimes tend to be the first and not be considered as part of poor kidney function... the alert mouth... gives signs.
Obviously the relationship between general health and oral health is in both directions, it is bidirectional. People with fragile immune systems are more likely to get infections in the mouth. Respiratory, vascular and gastric pathologies disturb the state of oral health, such as stomach hyperacidity that damages dental enamel in posterior molars. Some medications and the lack of certain nutrients, such as calcium, cause problems in the mouth. For all this it is important to maintain oral health, not only for the aesthetic part but also for all that organically means, good chewing, saliva as a degrading factor in food,
References :
https://www.fdiworlddental.org/fdis-definition-oral-health
https://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/dental/art-20047475