Final answer:
The gomphosis is a specialized joint that secures teeth in the jaw, using periodontal ligaments. It's classified as a synarthrosis because it permits little to no movement, providing stability for the teeth.
Step-by-step explanation:
The piece of equipment associated with the anchor tooth is the gomphosis. This is a type of joint known as a peg-and-socket joint, where a tooth anchors into the bony socket of either the maxillary bone or the mandible bone. The connection between the tooth and the bony socket is made by periodontal ligaments, which are short bands of dense connective tissue. Because of its design and function, a gomphosis allows for virtually no movement, which qualifies it as a synarthrosis joint. This firm attachment is crucial for the stability of teeth during the powerful movements of chewing and biting.