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32 Cards in this Set
- Front
- Back
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Periodontal anatomy that is visible on radiographs include what |
Alveolar bone Cortical bone alveolar crest lamina dura periodontal ligament space cementum
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What are examples of radiolucent structures of the tooth (5) |
pulp periodontal ligament space periapical abscess marrow spaces in bone bone loss defects |
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Examples of radiopaque structures and materials are (6) |
Amalagam newer composite restorations Enamel Dentin pulp stones compact or cortical bone |
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What is cortical bone |
Outer surface of the bone |
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Maxilla of the cortical bone is what Mandible of the Cortical bone is what |
is a thin shell Dense layer (appears as a thick white border) |
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How does the cortical bone appear on a radiograph |
Inferior border of the mandible appears as a thick white border
Interdental alveolar crest thin white line
Lattice like filling interior portion (cancellous bone) |
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What is the characteristics of the Alveolar crest |
normal level is about 2mm apical to CEJ If coronal bone level is within 3 mm of CEJ considered normal Difficult to detect bone loss on radiographs if less than 3 |
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what is a good indicator of periodontal health |
The contour of the crest of the interdental bone |
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Contour should be what |
Parallel line drawn between the CEJs of adjacent teeth |
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Surface of bony crests are what |
smooth and covered with a thin layer of cortical bone (seen as a thin white line on radiograph) |
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Interdental septa between incisors should be Interdental septa between posterior teeth should be? |
Thin and pointed rounded or flat |
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In radiographs the alveolar bone proper is identified as the |
Lamina dura |
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What is lamina dura |
thin layer of dense bone that lines a normal tooth socket |
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What does the lamina dura appear as on a radiograph |
continuous white line around the tooth root |
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On a radiograph the lamina dura is continuous with |
cortical bone layer of the crest of the interdental septa |
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The PDL space functions as |
Attachment of the tooth to the lamina dura of the socket |
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How does the PDL space appear on a radiograph |
Thin radiolucent line surrounding the tooth root |
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What indicates tooth mobility |
Widening of the PDL space on a radiograph |
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What are the benefits of radiograph assessment, radiographs show? (7) |
Bony changes caused by disease Tooth root morphology Relationship of maxillary sinus to periodontal derformity Widening of PDL space Advanced furcation involvement Periodontal abscess Local factors |
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What indicates early bone changes |
Fuzziness at the crest of alveolar bone Widening periodontal ligament space Radiolucent areas in interseptal bone |
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What is triangulation refer to |
widenting of the PDL space caused by bone resorption on either the distal or mesial interdental crestal bone |
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Triangulation is also known as |
Funneling |
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What is interseptal bone changes appear as on a radiograph |
finger-lie radiolucent projections extending from crestal bone into interdental alveolar bone |
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Those finger like radiolucent lines represent what |
A reduction of mineralized tissue adjacent to blood vessel channels in alveolar bone |
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The extent or direction of bone loss is determined using the CEJ of adjacent teeth as he points of reference for what |
Horizontal Vertical bone loss |
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Furcation involvement of what teeth are easier to detect on radiographs |
mandibular molars |
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If using the radiograph to aid in the detection of furcation involvement, the following rules should be kept in mind(2)s |
If there is slight thickening of the PDL space in the furcation area
If severe bone loss is present on the mesial or distal surface of a multi-rooted tooth |
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What are some local contributing factors that may be revealed on a radiograph |
Calculus deposits Faulty restorations food packing areas |
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What are radiographic signs of trauma from occlusion |
Increased width of the PDL space on the mesial and distal sides due to resorption of the lamina dura
Vertical or angular bone destruction |
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Bitewing radiographs show what |
Horizontal/ Vertical bone loss Calculus Furcation involvement Restorations |
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Why are periapical radiographs not as accurate in determining bone loss |
A radiograph with excessive vertical angulation can obsecure bone loss |
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When might a periapical radiograph be better? |
crestal bone loss of 5mm or greater may not be able to see on a bw radiograph |
