Synarthrosis

Overview
A synarthrosis is a type of joint which permits little or no mobility. Most synarthrosis joints are fibrous.

Suture joints and synchondroses are synarthroses.

Types
They can be categorised by how the two bones are joined together:
 * Synchondroses are joints where the two bones are connected by a piece of cartilage.
 * Synostoses are where two bones that are initially separted eventually fuse together, essentially becoming one bone. In humans the plates of the cranium fuse together as a child approaches adulthood. Children whose craniums 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 craniostenosis.