Gomphosis
| 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 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.
[edit] 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.
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