1. What did the periodontal ligament start out as?
    the dental sac
  2. Where is the periodontal ligament derived from?
    the mesoderm
  3. the fibrous connective tissue that attaches the tooth to the bone
    periodontal ligament
  4. how does the periodontal ligament appear on a radiograph?
    a radiolucent area
  5. What is the periodontal ligament referred to as on a radiograph?
    periodontal space
  6. Why do we know how hard to bite on things?
    because the periodontal ligament transmits occlusal surfaces, and it feels if we bite too hard
  7. What type of sensations can the periodontal disease detect? (4)
    • pressure
    • pain
    • touch
    • temperature
  8. What type of tissue is the PDL?
    connective tissue
  9. true or false. There are nerves in the periodontal ligament or periodontal space
  10. What are 5 components of the PDL?
    • intercellular substance
    • blood vessels
    • nerves
    • cells
    • fibers
  11. What do the blood vessels in the PDL supply nutrients to?
    • alveolus
    • cementum
    • pulp of the tooth (once the vessels enter the apical foramen)
  12. what type of nerves are in the PDL?
    afferent sensory nerves
  13. Name 4 types of cells found in the PDL
    • fibroblasts
    • osteoblasts/clasts
    • cementoblasts/clasts
    • epithelial rests of malassez
  14. typical connective tissue cells found in the PDL
  15. cells in the PDL that are located along the periphery of alveolar bone they can build/destroy bone
  16. where are the osteoblasts and clast cells located?
    along the periphery of cementum
  17. cells in the PDL that are located along the periphery of cementum, and can build/destroy cementum
  18. Where are the cementoblasts and clasts located?
    along the periphery of cementum
  19. these cells started out as HERS, but got lost
    epithelial rests of malassez
  20. true or false. epithelial rests of malassez can be cystic
  21. cells composed of bundles of fibers that connect the bone to the tooth with sharpey's fibers
  22. What are 2 clinical considerations with the periodontal ligament?
    • occlusal trauma
    • periodontal disease
  23. What are 2 examples of occlusal trauma that will put extra forces on the PDL?
    • clenching
    • grinding
  24. What will the PDL do to help withstand forces from clenching or grinding?
    it will widen
  25. What happens to the fibers of the PDL in periodontal disease?
    they get disorganized and lose their attachment
  26. What causes the fibers in the periodontal ligament to get disorganized and lose their attachment in periodontal disease?
    resorption of the bone and cementum
Card Set
periodontium 1