Mouth

Mouth entrance to the digestive and respiratory tracts. The mouth, or oral cavity, is ordinarily a simple opening in lower animals; in vertebrates it is a more complex structure. In humans, the mouth is defined in front and at the sides by the lips, jawbone, teeth, and gums; in the rear it merges with the throat. The roof of the mouth is composed of the hard and soft palates and the floor of the mouth is formed by the tongue, a muscular structure that contains the organs of taste (taste buds).

Pericoronitis

Pericoronitis is a dental disorder in which the gum tissue around the molar teeth becomes swollen and infected. This disorder usually occurs as a result of wisdom teeth, the third and final set of molars that most people get in their late teens or early twenties. Pericoronitis can develop when wisdom teeth only partially erupt (break through the gum). This allows an opening for bacteria to enter around the tooth and cause an infection.