A reduced overbite can often result in no incisal contact at all producing an âAnterior Openbiteâ this may be the result of a soft tissue interface or Skeletal discrepancy. An increased overbite is where the lower incisors bite on the palatal gingivae (gums) or mucosa.
The Region: The Sahel region is an eco-climate zone located on the southern edge of the Sahara desert. The region spans across Nigeria, Sudan, Senegal, Mauritania, Mali, Burkina Faso, Niger, and Chad (Ethiopia and Somalia are sometimes included in the Sahel region). The name, Sahel, comes from the Arabic work for âborderâ or âmarginâ.
In West Africa the Sahel is also a geopolitical entity -- the Permanent Interstates Committee for Drought Control in the Sahel (CILSS) was formed in 1973 by Burkina Faso, Cape Verde, Chad, Gambia, Guinea Bissau, Mali, Mauritania, Niger and Senegal.he Sahel region had a long period of declining rainfall from the early 1950s to the 1980s, with increasing rainfall since 1985, as shown in the following figure showing deviation from mean precipitation for 1900 to 2000 [ http://www.eoearth.org/article/Greening_of_the_Sahel ].