Fibrous joint

src: www.medicalook.com

Fibrous joints are connected by solid connective tissue, mainly composed of collagen. It is a fixed joint where bone is united by layers of white fibrous tissue with various thicknesses. In the skull, the joints between the bones are called sutures. This immovable joint is also referred to as synthesis.

Video Fibrous joint

Jenis

Most fibrous joints are also called "fixed" or "immobile", because they do not move. This joint does not have a joint cavity and is connected through a fibrous connective tissue.

The skull bones are connected by fibrous joints called sutures . On the skull of the fetal stitch width to allow for slight movement during birth. They then become rigid (synarthrodial).

Some long bones in the body such as the fingers and ulna in the forearm join with syndesmosis (along the interosseous membrane). Syndemoses move slightly (amphiarthrodial). The distal tibiofibular joint is another example.

A gomphosis is a connection between the root of the tooth and the socket in the maxilla or jawbones.

Maps Fibrous joint

Sutures

Stitches are a type of fibrous joint found only in the skull. The bones are bound together by the Sharpey fibers. A small amount of movement is allowed on the stitch, which contributes to the adherence and elasticity of the skull. This joint is a synarth process. It is normal for many skull bones to remain unaccustomed at birth. The integration of the skull bone at birth is known as craniosynostosis. The term "fontanel" is used to describe the resulting "soft dots". The relative positions of bone continue to change during adult life (though less rapidly), which can provide useful information in forensics and archeology. In old age, the skull sutures can harden (back to the bone) completely. The joint between the teeth (gomphoses) and the connections between the mandible and the cranium, the temporomandibular joint, forms the only joints not sewn on the skull.

Type of seam

Airplane sutures - bony edges fuse together like in normal butt joints
Stitch is agile - the edges are tilted so that the beveled suture fields as in the partner joint
Schindylesis - formed by two attached bones similar to the bridle joint.
Stitches are denticulated - slot ends to one another as in finger joints
Jagged sutures - similar to a dentist suture but a jagged interlocking area rather than a square.

List of stitches

Most stitches are named for the bones they articulate, but some have their own specific names.

Visible from the side

Coronal stitching - between frontal and parietal bones
Lambdoid stitches - between parietal and occipital bones and continues with occipitomastoid sutures
Occipitomastoid seams - between the occipital and temporal bones and continue with the sutura lambdoid
Sphenofrontal stitching
Sphenoparietal seams
Sphenosquamosal seals
sphenozygomatic seams
Squamous stitches - between parietal and temporal bones
zygomaticotemporal stitches
zygomaticofrontal stitching

Visible from the front or above

The frontal/metapic stitches - between the two front bones, before the blend of the two into one single bone
sagital stitches - along the midline, between the parietal bones

Can be viewed from the bottom or inside

frontoethmoidal stitching
Petrosquamous seams
sphenoethmoidal seals
Sphenopetrosal stitches

Gallery

Pictures: Fibrous Joint, - Human Anatomy Charts

src: human-anatomycharts.com

Syndesmosis

A syndesmosis is a slightly moving fibrous joint where bones such as the tibia and fibula are joined together by the connective tissue. Examples include distal tibia bone joints and radioulnar joints. Injury to ankle syndesmosis is commonly known as "high ankle sprain". Although syndesmosis is a joint, in the literature the term syndesmotic injury is used to describe syndesmotic ligament injury. It comes from the Greek ???, syn (meaning "with") and ??????, desmos (meaning "a band"). Dislocated syndesmosis has received increasing recognition over the past few years due to high awareness of the mechanisms, symptoms, and signs of injury.

Diagnosis of syndesmotic injury

Diagnosis of syndesmosis injury by physical examination is often easy. Positive physical examination findings include cracking tests and external rotation tests. Patients with high-grade syndesmosis injury are often unable to increase one-leg heel. Patients report pain in varying degrees above the distal anterior and often posterior fibular joints.

syndesmotic rips

The severity of acute syndesmosis injury is assessed from classes I to III by some authors. The grade I injury is a partial anteroinferior tibiofibular ligament tear, which means a negative exorotation and squeeze test for this grade. Grade II injury is a complete anteroinferior tibiofibular ligament and an inferior interosseal ligament ligament, which means that the squeeze and exorotation test is positive. This causes the injury to be stable with immobilization but is not operationally stable. Class III injuries include complete anteroinferior tibiofibular ligaments including partial ligamentous ligament (ligamentum) and deltoid ligament avulsion, which means unstable and positive joints on exorotation and squeeze tests. This value requires the stabilization of the operation. If syndesmosis is torn as a result of bone fracture, the surgeon will sometimes fix the relevant bone along with the syndesmotic screw, replacing the syndesmosis temporarily, or with tightrope fixation, called the Syndesmosis Procedure. The screw inhibits the normal movement of the bone and, thus, the corresponding joint (s). When natural articulation is healed, screws can be removed. Tense fixation with elastic fiberwire stitching on the other hand allows an ankle physiological movement and may be permanent.

Derived copy of Joints and Skeletal Movement

src: archive.cnx.org

Gomphosis

A gomphosis , also known as dentoalveolar syndemosis, is a joint that binds teeth to a bone tooth socket in the maxillary bone and the mandible. The fibrous connection between the tooth and the socket is the periodontal ligament. In particular, connections are made between the maxilla or mandible to the cementum of the tooth.

The gomphosis motion is minimal, although large movements can be achieved over time - the basis of using braces to realign the teeth. The joints can be considered as synarthrosis.

Gomphosis is the only type of joint in which the bone does not join the other bone, because the tooth is not technically bone. In the modern classification, more anatomically, together, gomphosis is only considered a fibrous joint because of the tissue linking the ligamentous structure.

Gomphosis is a special fibrous joint in which the process of a cone or peg from one bone fits into a hole or socket in another bone. (Gomphos is a Greek word meaning bolt). A small amount of fibrous tissue unifies the bone. No movement may occur on the stake and socket joints.