110466
Description
Mind Map by Caroline Oxford, updated more than 1 year ago
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Created by Caroline Oxford
almost 11 years ago
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The Periodontium
- Cementum
- Periodontal ligament
- Develops from dental folicle
- Foms shortly after root formation
- Starts with conective tissue/collagen fringes, extending to cementum
- Fibroblasts secrete collagen which remodel fringes
- Fibroblasts secrete collagen which remodel fringes
- Starts with conective tissue/collagen fringes, extending to cementum
- Foms shortly after root formation
- Fibers change as tooth errupts, then thicken
- Narrows with age
- Thin in non functional teeth
- Functions: Attachment, proprioreceptor, shock absorber
- Functions: Attachment, proprioreceptor, shock absorber
- Thin in non functional teeth
- Narrows with age
- Composed of
- Cells; Fibroblasts, epithelial cells (malassez,) Undifferenciated mesenchymal cells, Cementoblasts, Macrophages
- Ectracellular; Colagen, elastin (immature only), Ground substance (glycoprotein, glycolipids.)
- Ectracellular; Colagen, elastin (immature only), Ground substance (glycoprotein, glycolipids.)
- Cells; Fibroblasts, epithelial cells (malassez,) Undifferenciated mesenchymal cells, Cementoblasts, Macrophages
- Fibroblasts synthesis/degrade collagen for rapid turnover
- Mesenchymal cells are source of new PDL cells
- Oesteoblasts/Oesteoclasts line bone
- Cementoblasts line cementum.No Cementoclasts unless resorbtion of deciduos
- Cementoblasts line cementum.No Cementoclasts unless resorbtion of deciduos
- Oesteoblasts/Oesteoclasts line bone
- Mesenchymal cells are source of new PDL cells
- Collagen, types 1,3+7. Remodelled withe stress forces
- 5 principle types; Aveola crest, Horizontal, oblique, apical, inerridicular
- They run from cementum-bone. Sharpeys fibres
- Ground substance 70% water
- Ground substance 70% water
- They run from cementum-bone. Sharpeys fibres
- 5 principle types; Aveola crest, Horizontal, oblique, apical, inerridicular
- Rich blood supply; main from superiour and inferiour alveolar arteries,More posteria and mandible, less ants and maxilla
- 4 types of nerve endings, mostly free, Nocirecptors+ mechanicreceptor
- 4 types of nerve endings, mostly free, Nocirecptors+ mechanicreceptor
- Develops from dental folicle
- Alveolar Bone
- Consists of spongsiosa, sandwiched between buccal and ligual cortical plates
- Bone lining known as Bundle bone as attaches PDL bundles
- Perforated by forimina for nerves, vessels, known as cribiform plate or Lamina Dura on x-ray (white lining)
- Perforated by forimina for nerves, vessels, known as cribiform plate or Lamina Dura on x-ray (white lining)
- Bone lining known as Bundle bone as attaches PDL bundles
- Consists of spongsiosa, sandwiched between buccal and ligual cortical plates
- Gingivae
- Gingivae fibres, insert into lamina propria
- Groups include; Dentogingival, Alveologingival, circular, dentoperioestial,transseptal
- Groups include; Dentogingival, Alveologingival, circular, dentoperioestial,transseptal
- Dentogingival Junction
- Gingival tissue to tooth
- Epithelial and connective parts
- Epithelial part
- Statified, squamous epithelial cells
- Junctional epithelial, attached to tooth surface, forms collar, non keratinised
- Sulclar epithelial, lines sulcus, non-keratinised
- Oral gingival is keratinised.
- Oral gingival is keratinised.
- Junctional epithelial, Flattened cells, line tooth
- attached by hemidesmosomes and have high rate of turmover
- JE has pourous intercellular, can let through antigens, lined with immune cells.
- JE has pourous intercellular, can let through antigens, lined with immune cells.
- attached by hemidesmosomes and have high rate of turmover
- Sulclar epithelial, lines sulcus, non-keratinised
- Junctional epithelial, attached to tooth surface, forms collar, non keratinised
- Connective part
- Different from other connective tissue orally, as contains immflamatory cells.
- Monocytes continually migrate from vessels, through intercellular tissue, out to the sulcus
- Monocytes continually migrate from vessels, through intercellular tissue, out to the sulcus
- Col (interdental papilla,) identical to juntional epithelium
- Different from other connective tissue orally, as contains immflamatory cells.
- Statified, squamous epithelial cells
- Decreases with age, due to constant low grade imflamatory- Gingival recession
- Epithelial part
- Epithelial and connective parts
- Gingival tissue to tooth
- Gingivae fibres, insert into lamina propria
- Hyaline Layer
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