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.
The Three Golden Rules of Occlusion. Occlusion is one of the most controversial subjects in dentistry and also one of the most important. Dental schools spend very little time teaching occlusal concepts, leaving a huge void in our knowledge of this critical area. After graduation, most of the sources of occlusal education teach the subject in manners that overburden learners with complicated, multimodule curricula, and strict philosophies.