The mandible is a U-shaped bone. It is the only mobile bone of the facial skeleton, and, since it houses the lower teeth, its motion is essential for mastication. It is formed by intramembranous ossification. The mandible is composed of 2 hemimandibles joined at the midline by a vertical symphysis.
1 For example, AT&T charges $23 for a home residential line that includes a few additional basic features such as caller ID, call waiting and voicemail. 2  Home phone service plans that include local and long-distance calling cost $30-$45 per month.
For individuals, AT&T offers 4GB of data and unlimited talk and text for $110 per month. A full two years of service plus an iPhone 5 would cost a total of $2,839.99. A two-person family can get 4GB of shared data for the same $150 per month, with the identical unlimited voice and text offerings.