From the point of view of GI bleeding, however, the demarcation between the upper and lower GI tract is the duodenojejunal (DJ) junction (ligament of Treitz); bleeding above the DJ junction is called upper GI bleeding, and that below the DJ junction is called lower GI bleeding.
Answer Wiki. Dental occlusion is the contact between the teeth of the upper and lower jaw. It is basically how your teeth fit together. The cusps (the high rounded parts on the tooth surface) of the tooth come in contact with the grove of the opposing arch teeth a maximum intercuspation is achieved which means the teeth fully bite.
According to the American Association of Orthodontists, occlusion is the relationship between your upper (maxillary) and lower (mandibular) teeth as they come into functional contact, such as when you bite, chew or close your jaws together.f a misalignment of the teeth is present, these large forces can be translated form the misaligned teeth as destructive forces to the ligaments and bone that hold the teeth in place, the muscles of the head and neck and the jaw joint. If left untreated, malocclusion could lead to: 1  Chronic headaches.