periodontal tissue Flashcards
periodontium
tissues surrounding and supporting the teeth
functions of periodontium
retain tooth in socket, resist masticatory loads, defensive barrier
cellular cementum
- characteristics
- when formed
- alternative name
- where found
contains cells - cementocytes and no sharpeys fibres therefore no role in tooth attachment
formed 2nd (secondary)
extrinsic fibre cementum
found in apical 1//3
acellular cementum
- characteristics
- when formed
- alternative name
- where found
no cells, contains collagen fibres from PDL’s
formed first (primary cementum)
intrinsic fibre cementum
found in cervical 2/3
residual ridge
formed when teeth are lost and alveolar bone is resorbed
what arteries supply the gingiva
lingual and palatine
what arteries supply the periodontal ligaments
superior and inferior alveolar arteries
true periodontal ligament
attaches tooth to jaw
transmits biting forces to alveolar bone
what is the main PDL fibres that support the teeth and assist load bearing
collagen fibres - types one and three mainly
what are the 5 subgroups of alveolo-dental ligaments in relation to the PDL principle fibre groups
alveolar crest horizontal oblique apical interradicular (in multi -rooted teeth)
what is the subgroup of interdental ligaments in relation to PDL principal fibre groups
transeptal fibres
what are the 4 subgroups of gingival fibre groups
circular
dento-periosteal
dento gingival
alveolo gingival
what separates attached gingiva and free gingiva
the free gingival groove
what separates attached gingiva and alveolar mucosa
the mucogingival line
how are the teeth attached to the gingiva
junctional epithelium via hemidesmosomes
