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Ontologies▸uberon▸classes▸UBERON:0008266   
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periodontal ligament
http://purl.obolibrary.org/obo/UBERON_0008266

The fibrous connective tissue that surrounds the root of a tooth, separating it from and attaching it to the alveolar bone. It extends from the base of the gingival mucosa to the fundus of the bony socket, and its main function is to hold the tooth in its socket[BTO].

Also appears infovthcaomaxomondomp + 5
Exact Synonyms
fibra periodontalis
periodontal fiber
periodontal fibre
Related Synonyms
alveolar periosteum
alveolodental ligament
alveolodental membrane
desmodontium
odontoperiosteum
paradentium
PDL
peridental membrane
peridontal fiber
peridontal fibre
peridontal ligament fiber
peridontal ligament fibre
peridontal ligament
peridontal membrane
peridontium
periodontium
Depicted by
The_Periodontium.jpg
    class Information
    Contributor
    external_definition
    • The collagen fibers, running from the cementum to the alveolar bone, that suspend a tooth in its socket; they include apical, oblique, horizontal, and alveolar crest fibers, indicating that the orientation of the fibers varies at different levels[http://www.drugs.com/dict/desmodentium.html].
    • The fibrous connective tissue that surrounds the root of a tooth, separating it from and attaching it to the alveolar bone. It extends from the base of the gingival mucosa to the fundus of the bony socket, and its main function is to hold the tooth in its socket[BTO]. It consist of cells, extracellular compartment of fibers. The cells are fibroblast, epithelial, undifferentiated mesenchymal cells, bone and cementum cells. The extracellular compartment consists of collagen fibers bundles embedded in ground substance. The PDL substance has been estimated to be 70% water and is thought to have a significant effect on the tooth's ability to withstand stress loads[WP][periodontal ligamentbto, Wikipedia:Periodontal_fiber, https://github.com/obophenotype/uberon/issues/21].
    external_ontology_notes

    FMA treats periodontium and periodontal ligament as the same; it has a separate class desmodentium, which we place here even though it is classified as fetal in FMA

    has_obo_namespace

    uberon

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