Radiology Lecture- Chapter 21 and 22

cortical bone:

• compact and dense

• line the outside layers of the maxilla and mandible

• appears RADIOOPAQUE

• Latin- “outer layer”

cancellous bone:

• spongy bone

• forms the bulk of the inner bone

• appears RADIOLUCENT

• Latin- “arranged like a lattice”

cortical bone: appears

• radiopaque

cancellous bone: appears

• radiolucent

lamian dura:

• hard cortical bone that lines the alveolus (tooth socket)

• thin, radiopaque border that outlines the shape of the tooth socket and tooth root

periodontal ligaments (PDL) space:

• attaches the tooth to the lamina dura

• thin, radiolucent border between the lamina dura and the tooth root

• connects cementum

nutrient canals:

• blood vessels and nerves that supply the teeth, bone, and gingiva

• (mand anterior image)

soft tissue: appears

• radiolucent

panoramic radiographic appearance: of soft tissues

• ear

• cartilage of the nose

• lipline

• tongue

soft tissue appearance in pan: lipline

• horizontal radiopaque line superimposed over anterior teeth

• to resolve- bite around bite tab

soft tissue appearance in pan: tongue

• when positioned correctly, not visible

panoramic radiographic appearance: of air spaces

• palatalglossal air space

• nasopharyngeal air space

• glossopharyngeal air space

palatoglossal air space:

• between palate and tongue

nasopharyngeal air airspace:

• between nose and pharyns

• chin level (above soft palate)

glossopharyngeal air space:

• between tongue and pharyns

• if you don’t- vertical air space on ramus

  • so swallow and put tongue on the palate