suture

A suture is a type of fibrous joint found primarily in the skull and face, where bones are united by a layer of connective tissue called the periosteum. These joints are crucial for skull development, particularly in infants, allowing for molding during birth. In adults, sutures become immobile and fuse over time, transforming into bone. This fusion process, known as ossification, occurs from childhood through old age. The lines where new bone meets from adjacent centers form the cranial sutures visible on the adult skull. Sutures are considered transient joints because they eventually fuse.12