periodontal ligament Flashcards
what is the periodontal ligament?
connective tissue joining cementum to alveolar bone
what does the periodontal ligament contain?
cells, extracellular matrix, fibres, nerves, blood vessels
what is the function of the periodontal ligament matrix behaving like a gel?
transfer forces applied to the tooth to the alveolar bone
name the periodontal ligament cells
fibroblasts, cement oblasts, osteoclasts, cementoclats, epithelial cells, defence cells
what are the periodontal ligament sensory nerves?
mechanoreceptors and nociceptors
what is the function of mechanoreceptor cells in the periodontal ligament?
recognise how soft/hard food is and adjust chewing
what are nociceptors in the periodontal ligament involved in?
reflex
what are the 2 types of periodontal ligament fibres?
true periodontal ligament fibres and gingival ligament fibres
what is the function of true periodontal ligament fibres?
connect cementum to alveolar bone
what is the function of gingival ligament fibres and where are they found?
supportive, connect bone/tooth to gingiva, found above alveolar crest
name the 2 periodontal ligament principle fibre groups
alveolo-dental ligament and interdental ligament
name the alveolar-dental ligament fibres
alveolar crest, horizontal, oblique, apical, inter-radicular
name the interdental ligament fibre
trans-septal fibre
