Gingival Fiber Ligament & Periodontal Ligament- Exam II Flashcards
GFL:
Gingival Fiber Ligament
PDL
Periodontal Ligament
The GFL provides ____ and ____ to the marginal gingiva
rigidity & density
The GFL acts as the ___for the interproximal crestal alveolar bone
periosteum
The GFL provides 1/2 of the ____
biological width
The GFL acts as a _____ for the crestal alveolar bone against the spread of ______
protective barrier; gingival inflammation
The GFL Inhibits the _____ of the junctional epithelium
apical migration
List the GFL fiber groups: (7)
- dentogingival
- dentoperiosteal
- alveologingival
- circular
- transseptal
- semicircular
- transgingival
The area of junctional epithelium and gingival fiber ligament attached to the root of the tooth:
biological width
The biological width extends from more ____ of the junctional epithelium to the _____.
coronal attachment; crestal alveolar bone
Violation of the biological width due to placement of overextended restoration margins will result in ____ and if given sufficient time it may induce the loss of supporting _____ with formation of a diseased ______.
chronic inflammation; alveolar bone; periodontal pocket
Functions of the PDL include: (5)
- supportive
- regernative
- nutritional
- sensory
- protective
The PDL is derived from ______ cells
ectomesenchymal cells (neural crest cells)
The PDL is derived from ectomesenchymal cells (neural crest cells) in the ____ zone of the _____.
intermediate zone; dental follical
Cells in the most peripheral zone (outer) of the dental follicle give rise to the _____ . Cells in the most proximal (inner) give rise to ______.
alveolar bone proper; cementoblasts
____ are embedded into the cementum of the PDL
collagen fibers
consists of small diameter collagen fibers in random orientation that provides support for the principle fiber groups
indifferent fiber plexus
Resident cell populations of the PDL include: (7)
- fibroblasts
- osteoblasts
- cementoblasts
- macrophages
- undifferentiated mesenchymal cells
- endothelial cells
- epithelial cells
PDL fiber groups include: (5)
- Alveolar crest
- Horizontal
- Oblique
- Apical
- Interradicular
PDL fiber group that resists vertical force only:
Apical and Alveolar Crest
PDL fiber group that resists vertical and lateral forces:
Interradicular
PDL fiber group that resists intrusive forces only:
Oblique
PDL fiber group that resists horizontal and tipping force:
Horizontal