FREELY MOVABLE JOINTS-DIARTHROSIS
Example-Knee joints, Majority of the joints
of the limb
Defined as connections between bones held
together by fibrous connective tissues that
includes mainly of collagen fibers.
In most instances, fibrous joints consists
predominantly of collagenous junction
between bones but in minority of situations
fibro-elastic tissue predominates.
A suture is an immovable joint consists of a
thin layer of dense fibrous connective tissue
attaching certain bones of the skull.
The irregular interlocking edges of cranial
bone that are attached together by the suture
joints contribute to the strength of the joint.
Are limited to skull and occur wherever
margins or broad surfaces of bones are
seperated by connective tissue, the sutural
ligament or membrane.
Is a surviving unossified part of mesenchymal
sheets in which dermal bone develops.
Consists of region of differentiation
concerned in growth and binding of apposed
bone surfaces. A cambial layer rich in
osteogenic cells covered by a capsular lamella
of fibrous tissue is present at the sutural
outlines of bones which is continous with the
periosteum lining the margins of sutural
surface which provides added strength.
With in this, a central stratum of fibrous
connective tissue is present with thin walled
blood vessels , the veins of which
communicates with the diploic veins, intra
cranial venous sinuses and external veins in
During growth, secondary cartilage formation
occurs with in the sutural ligament, indicating
the relationship between the cartilagenous
and fibrous joints.
Once the cranial growth ends, the osteogenic
cells undergo complete ossification leading to
obliteration and rigid synostosis, which is a
Sutural ligament may create as almost
immovable bond between large areas of the
Specialized suture in which rigid bone fits in
to a groove on a neighbour element.
Example: Cleft between the alae of the vomer
which receives the rostrum of sphenoid
Immovable joints in which bones are attached
by intra osseous ligament in the form of a
slender fibrous chord or aponeurotic
membrane which is neither a suture or
Example:-Distal articulation of tibia and
fibula by connective tissue of ankle. In jury to
this connective tissue result in high ankle
•Syndesmosis are found in the
vertebral column, middle ear,
antebrachium, and leg. The
articulating bones of
syndesmosis are held together
by interosseous ligaments,
which permit slight movement.
A peg and socket joint is a specialized fibrous
articulate restricted to the fixation of teeth in
alveolar sockets in maxilla and mandible.
The only gomphosis in the human body are
attachments of root of the tooth with in the
sockets of the alveolar process
The collagen of periodontium connects the
cementum to the alveolar bone which helps in
the articulation of teeth with in the sockets.
Although the fibrous joint does not produce
any movement, these serve as the connecting
bond between two solid structures in a
human body which provides an added
strength for certain bones to attach each
other and attachment of teeth with in the