Radiographic Examination Flashcards
Lamina dura AKA
alveolar bone proper
Radiographs are NOT
Not diagnostic of periodontal disease
Correlate with clinical attachment level
Bone loss % =
CEJ-Crest - 2 mm /
CEJ-Apex - 2 mm
Mild
Bone Loss ≤
20%
Moderate
Bone Loss
21% to 49%
Severe
Bone loss
≥ 50%
The crestal bone is a continuation of the
lamina dura of the teeth, and is continuous from tooth to tooth.
The integrity of the crestal lamina dura, evaluated on either PA or bite-wing radiographs, does not seem to be related to the presence or absence of
visual inflammation, BOP, periodontal pocketing, or loss of connective tissue attachment in the corresponding interdental area.
Using integrity of crestal lamina dura as an indicator for the need of periodontal treatment is .
not appropriate
Hemiseptal defect: a vertical defect in the presence
of
adjacent roots; thus half of a septum remains on
one tooth, AKA one-walled defect
Osseous Crater:
Buccal and Lingual Wall(Two walled defect)
Crater: A cup- or bowl-shaped defect in the interalveolar bone
Moat-like Defect
An intrabony resorptive lesion involving one or more surfaces of supporting bone
A deep and wide trench defect around tooth
Bone Loss in Furcation Areas
Pathologic resorption of bone within a furcation. - shows up as radiolucency in furcation area.
The PDL appears as the periodontal space of
0.4 to 1.5 mm on radiographs, a radiolucent area between the radiopaque lamina dura of the alveolar bone proper and the radio opaque cementum. It tends to be wider at the apex and alveolar crest, and narrow in the mid-root areas.
IF the maxillary sinus is close to or has invaginated among the roots of the maxillary teeth, there may be difficulties with
surgical treatment of the periodontal problems.
