Periodontal Ligament Flashcards
what is the periodontal ligament?
connective tissue
what does the periodontal ligament contain?
cells, extracellular matrix, fibres, nerves and blood vessels
what makes up the periodontal ligament matrix?
hyaluronate glycosaminoglycans, proteoglycans and glycoproteins
what does the periodontal ligament behave like?
a viscous elastic gel
what are the cells in the periodontal ligament?
fibroblasts, cementoblasts, osteoclasts and cementoclasts, epithelial cells and defence cells
what epithelial cells are in the periodontal ligament?
cells rests (or debris) of Malassez
what are the sensory nerves of the periodontal ligament?
mechanoreceptors and nociceptors
what does the autonomic (sympathetic) nervous system control in the PDL?
blood vessels and vasoconstriction
what is true periodontal ligament?
fibres connecting tooth to bone at/or apical to alveolar crest
what is the gingival ligament?
fibres mainly above the alveolar crest, including free gingival fibres
what does the periodontal ligament do?
attaches tooth to jaw and transmits biting forces to alveolar bone
what fibres are included in the alveolo-dental ligament?
alveolar crest, horizontal, oblique, apial, inter-radicular (mulit-rooted teeth)
what fibres are included in the interdental ligament?
trans-septal fibres
