Radiology - Intraoral Anatomy Flashcards
Order of radiographic density of structures (from most radiopaque -> radiolucent)
Enamel (radiopaque)
Cortical bone
Dentin/cementum
Alveolar bone
Pulp chambers and canals
PDL space (radiolucent)
Densest structure found in human body
Enamel
On an X-ray: outermost radiopaque layer of crown of a tooth
Enamel
Found beneath enamel layer of a tooth and surrounds pulp cavity
Dentin
Makes up majority of tooth structure
Dentin
On an X-ray: appears radiopaque, but not as radiopaque as enamel
Dentin
________ is not usually apparent radiographically bc the contrast between it and dentin is so low and the __________ layer is so thin
cementum; cementum
When is the only time you could see cementum on an X-Ray?
Hypercementosis
Contains blood vessels, nerves, and lymphatics
Pulp chamber/root canals
On an X-Ray: appears relatively radiolucent
Pulp chamber/root canals
Space between the root of the tooth and the lamina dura
PDL space
Contains connective tissue fibers, blood vessels, and lymphatics
PDL space
On an X-Ray: a thin radiolucent line around the root of a tooth
PDL space
On an X-Ray: In the healthy periodontium - continuous radiolucent line of uniform thickness
PDL space
Wall of the tooth socket that surrounds the root of a tooth; made up of dense cortical bone
Lamina dura
On an X-Ray: dense radiopaque line that surrounds the root of a tooth
Lamina dura
Most coronal portion of alveolar bone found between teeth
Alveolar crest
Made up of dense cortical bone and is continuous with the lamina dura
Alveolar crest
On an X-Ray: appears radiopaque and is typically located 1.5 to 2.0 mm below the junction of the
crown and the root surfaces (the cemento-
enamel junction)
Alveolar crest
Supports and encases the roots of teeth
Alveolar bone
On an X-Ray:
trabeculae - radiopaque lines
medullary spaces – radiolucent areas
Alveolar bone
On an X-Ray: radiolucent region at the apex of teeth in formation
Dental papilla space
On an X-Ray: radiolucent area between the crown of an unerupted tooth and the surrounding bone
Dental follicle space
Suture present between the palatine processes and the anterior portion of the maxilla
Intermaxillary suture
On an X-Ray: radiolucent line, in the midline, between the central incisors
Intermaxillary suture
Exit of the nasopalatine canal
Incisive foramen
On an X-Ray: ovoid radiolucency, often with diffuse borders
Incisive foramen
On an X-Ray: bilateral circular or ovoid radiolucent image
Nasal opening of nasopalatine canal
Bone cavities filled with air divided by
the nasal septum
Nasal fossae
On an X-Ray: radiolucent area in maxilla
Nasal fossae
Wafer-thin, curved plates of bone that extend from the lateral walls of the nasal cavity
Inferior nasal concha
On an X-Ray: radiopaque structure extending from the lateral walls of the nasal cavity
Inferior nasal concha
Divides the nasal cavity into two fossae
Nasal septum
On an X-Ray: vertical radiopaque structure on maxilla
Nasal septum