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.
âOcclusion is the âbig pictureâ in dentistry,â explains Dr. McKee. âItâs the most important discipline in dentistry that there is to learn.â As he explains, there are two root causes for most dental problems: bacteria, which lead to decay or periodontal breakdown, and bite forces.