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.
Local calls will be billed automatically to the RIT telephone from which you place the call. Phones with the capability of making local calls will be charged $1.50 per month for local usage. Long Distance. Within 585 Area Code: Dial 9 + 7-digit number; Outside of 585 Area Code: Dial 9 + 1 + area code + 7-digit number