Final answer:
A gomphosis joint is formed when the teeth are bound to the alveolar processes of the maxilla and mandible bones by the periodontal ligament.
Step-by-step explanation:
A gomphosis joint is formed when the teeth are bound to the alveolar processes of the maxilla and mandible bones. The gomphosis joint is held together by three structures: the bony walls of the socket, the root of the tooth, and the periodontal ligament, which is a dense connective tissue. These three components work together to provide stability and anchorage for the teeth in the jaws.