Final answer:
The bone that has posts on either side and teeth in the middle is the mandible, which forms the lower jaw and holds the lower teeth.
Step-by-step explanation:
If a bone feels like it has posts on either side and teeth in the middle, it is most likely the mandible. The mandible forms the lower jaw and is characterized by a horizontal body with teeth and posteriorly, two vertically oriented rami (plural for ramus), which are the 'posts' referred to in the question. The mandible is unique as it is the only moveable bone of the skull, and at birth consists of paired bones that fuse together during the first year. Each tooth is anchored into a deep socket called an alveolus, forming the tooth-bearing part of the bone.