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]. [ https://github.com/obophenotype/uberon/issues/1233 https://github.com/obophenotype/uberon/issues/21 http://en.wikipedia.org/wiki/Periodontal_fiber http://purl.obolibrary.org/obo/BTO_0001020 ]

Synonyms: periodontal fibre fibra periodontalis periodontal fiber

This is just here as a test because I lose it

Term information

Subsets

pheno_slim

contributor

https://github.com/cmungall
https://github.com/tmeehan

depicted by

The:Periodontium.jpg

external definition

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][BTO:0001020, Wikipedia:Periodontal_fiber, https://github.com/obophenotype/uberon/issues/21].
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].

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 related synonym

paradentium
peridental membrane
peridontal ligament
peridontal fibre
peridontal ligament fiber
peridontal fiber
peridontal ligament fibre
peridontal membrane
periodontium
odontoperiosteum
alveolodental ligament
alveolodental membrane
alveolar periosteum
PDL
desmodontium
peridontium

id

UBERON:0008266

see also

http://purl.obolibrary.org/obo/FMA_76870