A synchondrosis (or primary cartilaginous joint) is a type of
cartilaginous joint
Cartilaginous joints are connected entirely by cartilage (fibrocartilage or hyaline). Cartilaginous joints allow more movement between bones than a fibrous joint but less than the highly mobile synovial joint. Cartilaginous joints also forms t ...
where
hyaline cartilage completely joins together two bones.
Synchondroses are different than
symphyses (secondary cartilaginous joints) which are formed of
fibrocartilage. Synchondroses are immovable joints and are thus referred to as
synarthroses.
Examples in the human body
Permanent synchondroses
* first
sternocostal joint (where first rib meets the manubrium of the sternum)
*petro-occipital synchondrosis
Temporary synchondroses (fuse during development)
*
epiphyseal plates
* apophyses
* synchondroses in the developing
hip bone
The hip bone (os coxae, innominate bone, pelvic bone or coxal bone) is a large flat bone, constricted in the center and expanded above and below. In some vertebrates (including humans before puberty) it is composed of three parts: the ilium, isch ...
composed of the
ilium,
ischium and
pubis
* spheno-occipital synchondrosis
References
{{Authority control
Joints