Dental Anatomy

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sthomp88
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48169
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Dental Anatomy
Updated:
2010-12-13 22:41:01
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Chapter twenty
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Fundamental and preventative curvatures 1...
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  1. What are 5 functions of primary teeth?
    • aesthetics
    • mastication
    • speech
    • place holders
    • primate spaces
  2. one of the functions of primary teeth is to serve as place holders for______________.
    succadaneous, or permanent teeth
  3. spaces between primary teeth that leave room for the jaw to grow, are known as
    primate spaces
  4. what are 2 areas where primate spaces are usually found?
    • between the maxillary lateral incisor, and canine
    • between the mandibular canine and 1st primary molar
  5. true or false. It is very important to let the childs caregiver know about the importance of primary teeth, because they may not know themselves
    true
  6. What might occur if a child loses their primary teeth too early? What is done in this case?
    • mesial drift of other teeth, making it so that permanent or secondary teeth don't have room to erupt
    • space maintainers are used
  7. young children have ground down black teeth, usually seen in other cultures. This may be a result of?
    baby bottle mouth
  8. When should you first take your child to the dentist? What is a big reason why?
    • before they are 12 months old
    • to get them used to coming to the dentist
  9. Why are primary teeth more susceptible to decay than secondary teeth?
    because they have thinner enamel and dentin
  10. true or false. Primary teeth have a larger pulp chamber than secondary teeth, thus creating a higher risk for pulpal exposure
    true
  11. In the primary dentition, what are 2 places that early aggressive periodontitis may occur?
    • lower anterior incisors
    • mandibular 1st molars
  12. bone loss around lower anterior incisors and mandibular 1st molars, and severe gingivitis in primary dentition might indicate what?
    early aggressive periodontitis
  13. How many phases of arch development are there?
    5 phases
  14. This phase occurs when the permanent first molars erupt
    phase 1 of arch development
  15. Which teeth, and during which phase, add dramatically to the chewing efficiency and jaw development during a period of rapid growth of a child?
    • permanent first molars
    • phase 1 of arch development
  16. during which phase of arch development is the jaw growing the most?
    phase 1
  17. Which teeth, and during which phase, help support the jaws while the primary anterior teeth are being shed and the other permanent teeth are erupting?
    • permanent first molars
    • phase 1 of arch development
  18. true or false. During phase 1 of arch development, primate spaces remain to allow for future space for permanent teeth.
    true
  19. Which phase of arch development occurs with the eruption of the permanent anterior teeth near the midline of the oral cavity, which is usually the the centrals first, than the laterals.
    phase 2
  20. The permanent anterior teeth near the midline of the oral cavity generally erupt lingual to the primary anterior roots, so when do they establish their final location?
    it is not fully established until the primary teeth are lost and the arch is fully developed
  21. What phase of arch development begins when the premolars erupt?
    phase 3
  22. difference in the size mesially to distally between primary molars and permanent premolars; space allows for future former movement of the molars
    leeway space
  23. required to preserve this space if permanent 2nd molars erupt prior to premolars or if a primary molar is lost prematurely
    space maintainer
  24. Which phase begins when the canines wedge themselves between the lateral incisors and the first premolars?
    phase 4
  25. During which phase are the contact relations between the teeth established, and the arch is complete from the first molar forward?
    phase 4
  26. 2nd molars are erupting and_____________1st molars during the_____________ process.
    • support
    • wedging
  27. What is the final phase of arch development that consists of eruption of the 3rd molars?
    phase 5
  28. which phase of arch development never occurs in some people?
    phase 5
  29. ___________of the teeth contribute to the maintenance of the teeth within the dental arch
    curvatures
  30. The maxillary arch is__________________occlusally, and the mandibular arch is_____________.
    • convex
    • concave
  31. the anterposterior curvature (concave curve) that is produced by the curved alignment of all the teeth (especially evident when viewing the posterior teeth from the buccal side)
    curve of spee
  32. curve that results when a frontal section is taken through each set of both maxillary and mandibular molars, the firsts, seconds, then thirds (concave curve on mandible, and convex on maxilla)
    curve of wilson
  33. Why do the curve of spee and curve of wilson tend to be lost with age?
    it is a result of attrition
  34. Angulations of each tooth's root or roots within the alveolar bone are noted when a tooth is bisected by its what?
    Root axis line
  35. The angulation of each tooth's root, or roots allows for proper what?
    proper spacing between the roots for blood and nerve supply and for securing anchorage of the roots in the jaw bones
  36. What are 5 curvature functions?
    • preventing dental disease
    • dispersing occlusal trauma
    • protecting gingiva
    • life expectancy
    • species perpetuation
  37. How does the curvature of a tooth help prevent dental disease?
    it acts as a spill way and makes it easier for food to slide off the tooth
  38. true or false. Curvature of teeth can disperse occlusal trauma, if they don't disperse it correctly it can lead to loose teeth.
    true
  39. How does curvature of teeth protect the gingiva?
    the shape deflects food
  40. The longer you have your teeth, the longer______________________.
    life expectancy you will have
  41. prevents food impaction
    proximal contact areas
  42. prevents bacteria and debris build up
    proximal contact areas
  43. anchors teeth
    proximal contact areas
  44. resists traumatic forces
    proximal contact areas
  45. preserves bone support
    proximal contact areas
  46. area where we floss
    proximal contact areas
  47. The area where cusps contact cusps of teeth on the opposite arch (occlusal surfaces)
    contact points
  48. Which teeth have interproximal contacts at the incisal third?
    anterior teeth
  49. which teeth have interproximal contacts at the middle third, or more cervical?
    posterior teeth
  50. Where is the distal interproximal contact of the maxillary canine?
    at the center of the middle third
  51. The triangular shaped spaces between teeth, where the interdental papilla are
    interproximal spaces
  52. The space between roots of individual teeth, where the supporting bone is
    interdental spaces
  53. What is it called when gum tissue in the interproximal space (the interdental papilla) is missing?
    gingival or cervical embrasures
  54. spaces between the teeth that are occlusal to the contact areas (above where the col is)
    dental embrasures
  55. How are dental embrasures named?
    for location relative to the contact area (buccal, lingual, etc)
  56. Name 4 purposes of embrasures
    • prevent food impaction
    • dissipate occlusal forces
    • self cleansing
    • stimulates gums (saliva)
  57. What characteristic of the teeth keep the gingiva of the tongue, lips, and cheeks stimulated?
    the facial and lingual contours of the teeth
  58. What is another name for height of contour?
    crest of curvature
  59. contact areas help______________the teeth
    support
  60. the curvature of the CEJ/cervicle line is more curved, or higher on the______________
    mesial
  61. What is one purpose of the curvature of the CEJ or cervical line?
    helps attach the teeth to the bone and gives anterior teeth more support
  62. which teeth have a higher CEJ curvature? Anterior or Posterior?
    Anterior - especially maxillary
  63. What is a self-cleaning tendency of enamel?
    it is smooth and slick
  64. what is a self cleansing tendency of the crown shape?
    it can deflect food to gingiva because of its shape and curvature
  65. describe the tooth shapes of the following teeth that help it have self cleansing tendencies:
    incisors
    canines
    premolars
    • shovel (on the lingual surface)
    • spear shaped (it can pierce and hold food)
    • food is deflected to the occlusal surface by 1 cusp and chewed up by the other
  66. true or false. The tongue and cheek and pits and fissures act as self cleansing tendencies for the teeth as well
    true
  67. How are contours in the teeth protective to the periodontium?
    they deflect food and prevent food impaction, and promote gingival stimulation
  68. Which is better in restorations, and undercontoured tooth, or overcontoured tooth?
    undercontoured tooth

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