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.
Braces are used to move teeth into the ideal position and align how they bite together, known as occlusion. Malocclusion is used to describe the misalignment of teeth between the upper and lower dental arches, using the first molars as a reference point. There are three different types of misalignment, defined by the Angles Classification Method. Class I - Considered the ideal relationship between the upper and lower teeth.