radiology week eight

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sthomp88
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45519
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radiology week eight
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2010-10-27 19:20:16
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radiology chapter twenty six intraoral films mandible
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mandible
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  1. the vertical portion of the mandible that is found posterior to the 3rd molars.
    ramus
  2. the horizontal U-shaped portion of mandible that extends ramus to ramus
    body
  3. the portion of the mandible that encases and supports teeth
    alveolar process
  4. tiny bumps of bone that serve as attachment sites for the genioglussus and geniohyoid muscles. located on the lingual aspect of the mandible
    genial tubercles
  5. on mandibular PA; appear as ring shaped radiopacity below the apices of the mandibular incisors
    genial tubercles
  6. a tiny opening or hole in bone located on the internal surface of the mandible. It is located near the midline and is surrounded by the genial tubercles
    lingual foramen
  7. on mandibular PA; appears as a small radiolucent dot located inferior to the apices of the mandibular incisors
    lingual foramen
  8. tube-like passageways through the bone that contain nerves and blood vessels that supply the teeth. They are most often seen in the anterior mandible, a region that typically has thin bone
    nutrient canals
  9. on mandibular PA; vertical radiolucent lines, readily seen in areas of thin bone
    nutrient canals
  10. true or false. Nutrient canals may be more prominent in the edentulous mandible.
    true
  11. a linear prominence of cortical bone located on the external surface of the anterior portion of the mandible. It extends from the premolar region to the midline and slopes upward
    mental ridge
  12. on mandibular PA; thick radiopaque band that extends from the premolar region to the incisor region. It often appears superimposed over the mandibular anterior teeth
    mental ridge
  13. a scooped-out depressed area of bone located on the external surface of the anterior mandible. It is located above the mental ridge in the mandibular incisor region
    mental fossa
  14. on mandibular PA; radiolucent area above the mental ridge
    mental fossa
  15. an opening or hole in bone located on the external surface of the mandible in the region of the mandibular premolars. Blood vessels and nerves that supply the lower lip exit through this
    mental foramen
  16. on mandibular PA; small ovoid or round radiolucent area located in the apical region of the mandibular premolars.
    mental foramen
  17. Why is the mental foramen frequently misdiagnosed as a periapical region?
    because of its apical location
  18. a linear prominence of bone located on the internal surface of the mandible. It extends from the molar region downward and forward toward the lower border of the mandibular symphysis. It serves as an attachment site for a muscle of the same name
    mylohyoid ridge
  19. on mandibular PA; a dense radiopaque band that extends downward and forward from the molar region. usually appears most prominent in the molar region, and may be superimposed over the roots of the mandibular teeth
    mylohyoid ridge
  20. true or false. the mylohyoid ridge may appear to be continuous with the internal oblique ridge
    true
  21. a tube-like passageway through bone that travels the length of the mandible. It extends from the mandibular foramen to the mental foramen and houses the inferior alveolar nerve and blood vessels
    mandibular canal
  22. on mandibular PA; radiolucent band outlined by 2 thin radiopaque lines that represent the cortical walls of the canal. it appears below or superimposed over the apices of the mandibular molar teeth
    mandibular canal
  23. a linear prominence of bone located on the internal surface of the mandible that extends downward and forward from the ramus. It may end in the region of the mandibular 3rd molar, or it may continue on as the mylohyoid ridge
    internal oblique ridge
  24. on mandibular PA; a radiopaque band that extends downward and forward from the ramus.
    internal oblique ridge
  25. When the oblique ridges appear separate, the superior radiopaque band is__________and the inferior radiopaque band is_____________
    • external oblique ridge
    • internal oblique ridge
  26. a linear prominence of bone located on the external surface of the body of the mandible. The anterior border of the ramus ends here
    external oblique ridge
  27. on a mandibular PA; a radiopaque band extending downward and forward from the anterior border of the ramus. It typically ends in the mandibular 3rd molar region
    external oblique ridge
  28. a scooped-out, depressed area of bone located on the internal surface of the mandible inferior to the mylohyoid ridge. the submandibular salivary gland is found here
    submandibular fossa - or mandibular fossa or submaxillary fossa
  29. on mandibular periapical radiograph: a radiolucent area in the molar region below the mylohyoid ridge. few bony trabeculae are usually seen in this region. On some it may appear as a distinct radiolucency, others it may be slightly more radiolucent than adjacent bone
    submandibular fossa
  30. a marked prominence of bone on the anterior ramus of the mandible. This serves as an attachment site for one of the muslces of mastication
    coronoid process
  31. appears on a maxillary molar PA; a triangular radiopacity superimposed over, or inferior to the maxillary tuberosity
    coronoid process
  32. What are the tooth structures that can be viewed on a radiograph?
    • enamel
    • dentin
    • dentinoenamel junction
    • pulp cavity
  33. the densest structure found in the human body. the outermost radiopaque layer of the crown of a tooth
    enamel
  34. found beneath the enamel layer of a tooth, and surrounds the pulp cavity. It appears radiopaque and comprises most of the tooth structure. It is not as radiopaque as enamel
    dentin
  35. the junction between dentin and enamel of a tooth. it appears as a line where the enamel (very radiopaque) meets the dentin (less radiopaque)
    dentinoenamel junction
  36. consists of a pulp chamber and pulp canals. It contains blood vessels, nerves, and lymphatics and appears relatively radiolucent on a dental radiograph
    pulp cavity
  37. Why is the pulp cavity larger in children than adults?
    because it decreases in size with age because of the formation of secondary dentin
  38. serves as the supporting structure for the teeth of the jaws. it is the bone of the maxilla and mandible that supports and encases the roots of teeth. Composed of dense cortical bone and cancellous bone
    Alveolar bone
  39. name the anatomical landmarks of the alveolar bone
    • lamina dura
    • alveolar crest
    • periodontal ligament space
  40. wall of the tooth socket that surrounds the root of a tooth, made up of dense cortical bone
    lamina dura
  41. appears as a dense radiopaque line that surrounds the root of a tooth
    lamina dura
  42. the most coronal portion of the alveorlar bone, found between the teeth. It is made up of dense cortical bone and is continous with the lamina dura
    alveolar crest
  43. appears radiopaque and is typically located 1.5 to 3 mm below the junction of the crown and root surfaces (the cementoenamel junction)
    alveolar crest
  44. the space between the root of the tooth and the lamina dura. it's space contains connective tissue fibers, blood vessels, and lymphatics
    periodontal ligament space
  45. a thin radiolucent line around the root of a tooth. In the healthy gums this space appears as a continuous radiolucent line of uniform thickness
    periodontal ligament space (PDL space)
  46. Normal alveolar crest located in the anterior region appears_________and ___________between the teeth. The alveolar crest appears as a dense________ line in the anterior regions
    • pointed
    • sharp
    • radiopaque
  47. Normal alveolar crest located in the posterior teeth region appears___________and____________between the teeth. The alveolar crest in the posterior region tend to appear less dense and less_____________than the alveolar crest seen in the anterior region.
    • smooth
    • flat
    • radiopaque

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