Embryology chapter ten

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Embryology chapter ten
2010-12-06 01:57:38
Embryology chapter ten gingival tissues

gingival tissues 1
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  1. tightly adheres to the bone
    attached gingiva
  2. extension of the attached gingiva, it is free gingiva located at the margin
    marginal gingiva
  3. the free edge of the gingiva, gingiva at the edge before you hit bone
    free gingival crest
  4. you measure recession from the_________to the________________
    • CEJ
    • free gingival crest
  5. gingiva between the teeth, AKA interdental papilla
    interdental gingiva
  6. What is the purpose of interdental gingiva?
    to prevent food impaction
  7. apical to the contact area, a concavity in the interdental papilla that forms between the lingual and facial gingival surfaces
  8. describe the color of healthy attached gingiva; unhealthy gingiva
    • pink; thick layer of parakeratinized epithelium which blocks the vascular supply in the lamina propria
    • red if unhealthy
  9. Which type of gingiva is stippled from tall narrow papilla in the lamina propria that pull on the epithelium and cause the dimples?
    Attached gingiva
  10. true or false. Stippling goes away if tissues are diseased?
  11. Which type of gingiva is immobile because it is firmly attached to the bone beneath it?
    attached gingiva
  12. describe the color of marginal gingiva
    pink; thick layer of parakeratinized epithelium which blocks the vascular supply in the lamina propria; pink because of the blood supply deep underneath the tissue
  13. which type of stippling has no stippling because it isn't attached?
    marginal gingiva
  14. which type of gingiva is mobile because it is not attached to the bone?
    marginal gingiva
  15. Pain, heat, erythema, edema, and loss of function may all be a result of_____________
  16. 2 types of inflammation include:
    • erythema
    • edema
  17. the tissue is red because of increased blood flow
  18. the interdental papilla is enlarged as it is filled with tissue fluid; it may cause the tissue to lose its stippling
  19. name 3 clinical considerations for gingival tissues
    • inflammation
    • gingival recession
    • gingiva hyperplasia
  20. the free gingiva margin starts to move apically- usually exposing cementum which can cause sensitivity because of exposed cementum
    gingival recession
  21. name 6 possible causes for gingival recession
    • periodontal disease
    • tooth position
    • incorrect tooth brushing
    • occlusal stress
    • strong frenal attachments
    • age
  22. How do you measure gingival recession?
    from the cementoenamel junction (CEJ) to the free gingival margin
  23. overgrowth of the interdental papilla, usually caused by poor oral hygiene and certain medications
    gingival hyperplasia
  24. name 3 medications and what they are perscribed for that may cause gingival hyperplasia
    • phenytoin sodium (Dilantin) - seizure control
    • cyclosporines - immunosuppressant
    • nifedipine - calcium channel blockers (heart medication)
  25. where the tooth surface and gingival tissues meet
    dentogingival junction
  26. the space between the tooth surface and the gingival tissues and can be filled with gingival fluid (crevicular fluid)
    gingival sulcus
  27. the epithelium on the inside of the sulcus
    sulcular epithelium
  28. a deeper extension of the sulcular epithelium, it lines the floor of the gingival sulcus and is attached to the tooth surface
    junctional epithelium (JE)
  29. the definite location of attachment between epithelium and enamel, cementum, or dentin, while probing, this is what stops your probe at the bottom of the sulcus
    epithelium attachment (EA)
  30. What is the normal depth of the gingival sulcus?
    .5-3 mm
  31. nonkeratinized stratified squamous epithelium that is tightly packed with many desmosomes, and has a smooth junction between the epithelium and the lamina propria, no papilla
    sulcular epithelium
  32. nonkeratinized stratified squamous epithelium, that is loosely packed with few desmosomes, it is more permeable so white blood cells can come from the blood vessels in the lamina propria and migrate into the epithelium
    junctional epithelium
  33. How do the white blood cells that enter the junctional epithelium help keep the tissue healthy?
    they help protect it from bacterial plaque
  34. this epithelium is very thin, only 4 layers thick, the basal cells reproduce by mitosis, and cells don't fill with keratin or flatten like normal layers of epithelium
    junctional epithelium
  35. the basement membrane, the velcro between the epithelium and the lamina propria
    external basal lamina
  36. a new basement membrane that; is on the inside of the sulcus; is the velcro between the epithelium and the tooth surface; has both the lamina lucida and densa layers; is continous with the external basal lamina
    internal basal lamina
  37. _______________secrete the initial basal lamina and develop_____________
    • ameloblasts
    • hemidesmosomes
  38. true or false. during active eruption, the dentogingival tissue peels away, but remains attached at the cementoenamel junction, this forms the initial junctional epithelium
  39. the_________________is formed by differentiation of the cells from the reduced enamel epithelium
    definitive junctional epithelium
  40. How long could the whole process of the development of dentogingival junctional tissues take?
    3 to 4 years
  41. name 2 clinical considerations with junctional epithelium
    • gingivitis
    • periodontitis
  42. increased permeability allow white blood cells out, but allows bacteria in; acute inflammation; ulceration of the epithelium exposes the blood vessels of the lamina propria; condition is reversible
  43. true or false. When you probe you can injure vessels exposed in junctional epithelium with gingivitis, and get bleeding on probing
  44. apical migration of the epithelial attachment; this deeper EA causes a deeper gingival sulcus, which we call a periodontal pocket; bacterial plaque and toxins penetrate the connective tissue, periodontal ligament, and bone; bleeding on probing is present; furcations may be present; teeth may become mobile as the bone and periodontal ligament are damaged; this is irreversible
  45. a deeper gingival sulcus
    periodontal pocket