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ODM 820 Lecture 7

Terms in this set (18)

Bone loss with gingivitis? Any radiographic signs?
No, no
What is best to visualize periodontitis? What is recommended when taking these x-rays?
Bitewings and paralleling PA's are best. Higher kVP (long scale, low contrast)
Contributing factors to Perio
Occlusal trauma
Overhands, poor contours
Calculus
Post extraction defects
Systemic involvement (diabetes, blood disorders, hormonal changes, stress, AIDs)
Do x rays provide a 2 or 3 dimensional view?
2d
Due to _____________, the details of the bony architecture may be lost (eg fenestration and dehiscence)
superimposition
A minimum of _______ demineralization must occur before radiographic changes are apparent.
55-60%
Radiographs do not demonstrate ___________ _________.
incipient disease
Do radiographs reliably demonstrate soft tissue contours? Do radiographs record changes in the soft tissue of the periodontium?
No, no
Bone height is within ________ of the CEJ.
2mm
What is a continuation of the lamina dura of the teeth?
The crestal bone and it is continuous from tooth to tooth
Between the anterior teeth, the alveolar crest is ___________
pointed
Between the posterior teeth the lamina dura and crestal bone form a ______ with ________ ________.
box, sharp angles
General radiographic features of Periodontal Disease
-Loss of the corticated interdental crestal margin
-Loss of the normally sharp angle between the crestal bone and the lamina dura
-Widening of the periodontal ligament space at the crestal margin
-Loss of the alveolar supporting bone
-Loss of bone in the furcation areas of multirooted teeth (furcation involvement) this can vary from widening of the furcation periodontal ligament to large zones of bone destruction.
-Associated complicating secondary local factors (overhanging filling ledges, lack of contact points, calculus)
Horizontal bone loss
Parallel to line drawn between adjacent CEJs
Vertical (angular) bone loss
More bone destruction on interproximal aspect of one tooth than on the adjacent tooth
Mild adult periodontitis
Loss of cortical density, rounding off of junction between alveolar crest and lamina dura, blunting of crest anteriorly
Moderate Adult Periodontitis
Horizontal bone loss or vertical osseous defects, bone level within middle 1/3 of the root, may have slight mobility
Severe Adult Perio
Tooth mobility, extensive horizontal bone loss or vertical osseous defects, furcation involvement, bone level in the apical 1/3 of the tooth
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