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29 Cards in this Set
- Front
- Back
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Hardest substance in the body and is approximately 90% mineral, has the greatest absorption of x-rays. More RO than bone bc of the thickness and density. The DEJ shows lines of contrast bw the enamel and dentin.
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enamel
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is approximately 75% mineralized and radiographic appearance is similar to bone because of its lower mineral content
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dentin
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has a mineral content of approximately 50% - not usually seen on a radiograph bc the contrast bw it and dentin is low
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cementum
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noncalcified tissue that is more RL than dentin
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pulp
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not visible radiographically but is in the space between the tooth and the lamina dura
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PDL
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thin layer of compact alveolar bone that lines the tooth socket
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lamina dura
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appears as a thin RO line around the root which allows nerve and vessels to reach PDL and cementum
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lamina dura
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normal level is 1.5mm to 2.0mm from the CEJ, part is continuous with the lamina dura and forms a sharp angle with it
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alveolar crest
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dense outer layer of bone and is without marrow spaces
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cortical bone
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resists passage of x-rays and is RO - examples: inferior border of mandible, crests of alveolar process, and lamina dura
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cortical bone
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bone marrow between two layers of cortical bone
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cancellous bone
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cancellous bone appears how on a radiograph?
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trabeculation patterns will appear RO and RL, however it is mainly RL
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process
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projection of bone
example: coronoid |
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ridge
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linear projection of bone
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spine
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sharp projection of bone
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tubercle
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small bump on bone
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tuberosity
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rounded prominence of bone
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canal
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passageway in boen tat contains nerve, artery and vein
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foramen
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opening in bone that permits passage of nerve and vessels
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fossa
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depressed area in bone
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sinus
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hollow space of cavity in bone
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suture
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immovable joint that is a line of union b/w adjoining bones of the skull - only found in skull and appear as a RL line
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nasolabial fold
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soft tissue shadow that extends from the ala of the nose to the corner of the lip
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bone pattern of anterior maxilla
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thin and numerous trabeculae, forming a fine, relatively rounded, dense pattern
smaller bone marrow spaces, fine trabeculation |
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bone pattern of posterior maxilla
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similar to anterior maxilla, but larger bone marrow spaces
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bone pattern of anterior mandible
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thicker and fewer trabeculae, forming a coarser pattern, trabecular plates oriented more horizontally, larger bone marrow spaces
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bone pattern of posterior mandible
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similar but larger bone marrow spaces, mainly horizontally oriented trabeculae, bone area just below the molar roots to the inferior border of the mandible may be devoid of trabeculation.
this appears more RL |
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RL structure located at the midline of the anterior portion of the hard palate, posterior to the maxillar centrals
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incisive foramen
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lateral walls of this structure appear as RO lines extending from incisive foramen to the floor of the nasal fossa
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nasopalatine canal
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