Gingival Connective Tissue Flashcards
(26 cards)
What is the Lamina Propria?
The dense connective tissue beneath the masticatory mucosa.
What two layers make up the lamina propria?
1) papillary layer: finger like projections (rete pegs)
2) reticular layer: located beneath rete ridges
Name the major gingival fibers? (CADD)
Circular group
Alveologingival group
Dentogingival group
Dentoperiostal group
Name the minor gingival fiber groups? (PIIIST)
Periosteogingival interpapillary intercircular intergingival semicircular transgingival
What cellular elements are found gingival CT?
65% (mainly collagen) fibers
5% cells
Remainder: proteoglycans, glycoproteins
What immune cells are found in the gingival CT?
Langerhan cells Mast cells Eosinophils Neutrophils Lymphocytes Plasma cells PMNs
Fibers found in gingival CT?
Collagen - type 1 (majority) - type 3 Elastic fibers - Oxytalan fibers
What fibers intermingle to form the PDL?
Sharpey’s fibers
What is the attachment apparatus?
PDL + cementum + alveolar bone
Functions of PDL
Suspend tooth
Pressure and pain sensory
Provide nutrients
Builds cementum and alveolar bone
General thickness of PDL?
0.1 - 0.25 mm
Thinner in non-functional teeth
Where are larger bundle fibers found in the PDL less abundant?
Bone surface rather than cemental surface
What are the PDL fibers? (IHATOA)
Interradicular Horizontal Alveolar Crest Transseptal Oblique Apical
Connective tissue cells in PDL?
Fibroblasts
Cementoblasts/clasts
Osteoblasts/clasts
Epithelial rest cells: rest cells of Malassez
Histological features of periodontium?
Acellular cementum (primary) Cellular cementum (secondary) CEJ (60-65%, 30%, 5-10%)
Bone types in jaw? (superficial to deep)
Alveolar bone proper (cribiform plate)
Cancelous bone
Cortical bone (dense bone)
Periosteum
What type of bone houses the root of the tooth?
Alveolar bone proper
What type of bone forms the hard outside wall of jaws on facial and lingual?
Cortical bone
Cortical bone is thickest and thinnest where?
Thickest- molars
Thinnest- incisor, canine, premolar
What are the three sources of vascular supply to a tooth?
1) apical vessels
2) Penetration through alveolar bone
3) Anastomosis from the gingiva
What are common causes for pigmentation?
Genetic iatrogenic mechanisms (amalgam tattoo) local irritants UV exposure Hyperplasia Medical disorders
Pigmentation can be categorized in what two ways?
Diffuse & Bilateral or Focal
Focal pigmentation likely means?
Melanoma, amalgam tatoo, abnormal growth
Diffuse or bilateral pigmentation likely means?
genetic (physiologic), Drug induced, Systemic
