They can be categorised by how the bones are joined together: •
Gomphosis is the type of joint in which a conical peg fits into a socket, for example, the socket of a tooth. Normally, there is very little movement of the teeth in the mandible or maxilla. •
Synostosis is where two bones that are initially separated eventually fuse, essentially becoming one bone. In humans, as in other animals, the plates of the cranium fuse with dense fibrous connective tissue as a child approaches adulthood. Children whose cranial plates fuse too early may suffer deformities and brain damage as the skull does not expand properly to accommodate the growing brain, a condition known as
craniosynostosis. •
Synchondrosis is a cartilaginous joint connected by
hyaline cartilage, as seen in the
epiphyseal plate. ==Characteristics==