- Gomphosis
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Gomphosis The permanent teeth, viewed from the right. Latin syndesmosis dentoalveolaris Gray's subject #70 284 Code TA A03.1.03.001 Gomphosis is a joint that binds the teeth to bony sockets (dental alveoli) in the maxillary bone and mandible. The fibrous connection between a tooth and its socket is a periodontal ligament. Specifically, the connection is made between the maxillary or mandible to the cementum of the tooth.
The motion of a gomphosis is very minimal, though considerable movement can be achieved over time—the basis of using braces to realign teeth. The joint can be considered a synarthrosis[1] or an amphiarthrosis.[2]
The gomphosis is the only joint-type in which a bone does not join another bone, as teeth are not technically bone. In modern, more anatomical, joint classification, the gomphosis is simply considered a fibrous joint because the tissue linking the structures is ligamentous.
A gomphosis is a specialized fibrous joint in which a conical process or peg of one bone fits into a hole or socket in another bone. (gomphos is a Greek word meaning bolt). Small quantity of fibrous tissue holds the bones together. No movement is possible at such peg-and-socket joints.
References
- ^ "Articulations". http://commons.bcit.ca/biology/articulations/synarthrotic.html. Retrieved 2008-01-29.
- ^ "Module - Introduction to Joints". http://anatomy.med.umich.edu/modules/joints_module/joints_06.html. Retrieved 2008-01-29.
Joints (TA A03.0, TH H3.02, GA 3.284) Types fibrous: Gomphosis · Suture · Syndesmosis · Interosseous membrane
cartilaginous: Synchondrosis · Symphysis
synovial: Plane joint · 1° (Hinge joint, Pivot joint) · 2° (Condyloid joint, Saddle joint) · 3° (Ball and socket joint)
by range of motion: Synarthrosis · Amphiarthrosis · DiarthrosisTerminology Motions general: Flexion/Extension · Adduction/Abduction · Internal rotation/External rotation · Elevation/Depression
specialized/upper limbs: Protraction/Retraction · Supination/Pronation
specialized/lower limbs: Plantarflexion/Dorsiflexion · Eversion/InversionComponents capsular: Articular capsule (Synovial membrane, Fibrous membrane) · Synovial fluid · Synovial bursa · Articular disk/Meniscus
extracapsular: Ligament · EnthesisM: JNT
anat(h/c, u, t, l)/phys
noco(arth/defr/back/soft)/cong, sysi/epon, injr
proc, drug(M01C, M4)
Bones of head and neck, joints: cranial fibrous joints (A03.1.01–03, GA 2.178–199) Cranial syndesmoses Pterygospinous ligament · Stylohyoid ligamentCranial sutures Cranial: frontoethmoidal · frontal or metopic (frontal/frontal) · coronal (frontal/parietal) · occipitomastoid (occipital/temporal) · lambdoid (parietal/temporal) · sagittal (parietal/parietal) · sphenoethmoidal · sphenofrontal · sphenoparietal · sphenosquamosal (sphenoid/temporal) · sphenopetrosal (sphenoid/temporal) · squamosal (temporal/parietal) · petrosquamous (temporal/temporal)
Cranial–facial: sphenozygomatic · zygomaticotemporal · zygomaticofrontal
Facial: palatomaxillary suture · Sutura embryonica · Sutura embryonica accessoriaDento-alveolar syndesmosis Synostoses Synostosis vomerina · Synostosis mandibularis · Synostosis frontalis · Synostosis petrosquamosa · Synostosis incisivaM: JNT
anat(h/c, u, t, l)/phys
noco(arth/defr/back/soft)/cong, sysi/epon, injr
proc, drug(M01C, M4)
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