Chapter 20 Flashcards
What structures are radiolucent (black) on a radiograph?
- pulp
- PDL space
- periapical abscess
- bone marrow spaces
- bone loss and defects
What structures are radiopaque (white) on a radiograph?
- metals such as amalgam
- newer composites
- enamel
- dentin
- compact bone or cortical bone
bone is a thin shell
cortical bone in maxilla
bone is dense, appears as a thick white border
cortical bone in mandible
What is the normal level of the crest of the alveolar bone?
2 mm apical to the CEJ
TRUE or FALSE: It is difficult to detect bone loss on a radiograph is the bone loss is less than 3 mm
TRUE
Crestal contour is a good indicator of what?
periodontal health
The contour should be parallel to a line drawn between what?
CEJ of adjacent teeth
Surfaces of the bony crests are what?
smooth and covered with a thin layer of cortical bone. seen as a thin white line of radiograph
When the CEJs of adjacent teeth are of the same level, the crest of the inter proximal bone will have what?
horizontal contour
When one of the adjacent teeth is tilted or erupted to a different height, the crest of the inter proximal bone will have a what?
vertical contour
The crest of the interdental septa between posterior teeth should be what?
rounded or flat
The crest of the interdental septa between anterior teeth should be what?
thin and pointed
thin layer of dense bone that lines a normal tooth socket. It appears as a continuous white line around the tooth roots
lamina dura
functions as an attachment of the tooth to the lamina dura of the socket.
PDL
