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Radiology Exam 4
| Question | Answer |
|---|---|
| Cortical Bone | Referred to as compact bone Dense outer layer of bone Appears radiopaque |
| Cancellous Bone | Soft, spongy bone located between two layers of dense cortical bone Appears primarily radiolucent |
| Process | Marked prominence or projection |
| Ridge | Linear prominence or projection |
| Spine | Sharp, thornlike projection |
| Tubercle | Small bump or nodule |
| Tuberosity | Rounded prominence |
| Canal | Tube-like passageway through bone that contains nerves and blood vessels |
| Foramen | Opening or hole that permits the passage of nerves and vessels |
| Fossa | Broad, shallow, scooped-out depressed area |
| Sinus | Hollow space, cavity or recess |
| Septum | A bony wall or partition that divides two spaces or cavities Radiopaque |
| Suture | An immovable joint representing a line of union between adjoining bones of the skull A think radiolucent line |
| Incisive foramen | Maxilla, round radiolucent Opening or hole in the bone located at the midline of the anterior portion of the hard palate directly posterior to the maxillary central incisors |
| Superior foramina of the incisive canal | Maxilla, round radiolucencies Two tiny openings or holes in bone that are located on the floor of the nasal cavity |
| Madian palatal suture | Maxilla, thin radiolucent line Immovable joint between the two palatine process of the maxilla |
| Lateral fossa | Maxilla, radiolucent Smooth, depressed area of the maxilla located between the maxillary canine and lateral incisors |
| Nasal cavity | Maxilla, large radiolucent area above maxillary incisors Pear-shaped compartment of bone located superior to the maxilla |
| Nasal septum | Maxilla, vertical radiopaque partition that divides nasal cavity Vertical only wall or partition that divides the nasal cavity into the left and right nasal fossae |
| Floor of the nasal cavity | Maxilla, dense radiopaque band of bone superior to the maxillary incisors Bone wall formed by the palatal processes of the maxilla and the horizontal portions of the palatine bones |
| Anterior nasal spine | Maxilla, appears "V" shaped radiopaque Sharp projection located at the floor of the nasal cavity and septum |
| Inferior nasal conchae | Maxilla, radiopaque mass within the nasal cavity Wafer-thin curved plates of bone that extend from the lateral walls of the nasal cavity |
| Maxillary sinua | Maxilla, radiolucent areas above apices of maxillary premolars/molars Paired cavities of bone located within the maxilla |
| Septa within the maxillary sinus | Maxilla, radiopaque lines within the maxillary sinus Bony walls that appear to divide the maxillary sinus into compartments |
| Nutrient canal | Maxilla, narrow radiolucent band bounded by two thin radiopaque lines Tiny, tube-like passageway through bone that contain blood vessels and nerves |
| Inverted Y | Maxilla, radiopaque upside-down Y Intersection of the maxillary sinus and the nasal cavity |
| Maxillary tuberosity | Maxilla, radiopaque bulge in molar region Rounded prominence of bone that extends posterior to the third molar region |
| Hamulus | Maxilla, radiopaque hook-like projection Small hook-like projection of bone extending from the medial pterygoid plate of the sphenoid bone |
| Zygomatic process of the maxilla | Maxilla, J- or U- shaped radiopacity superior to first molar region Bony projection of the maxilla that articulates with the zygoma or molar bone (cheekbone) |
| Zygoma | Maxilla, Radiopaque band extending from zygomatic process The cheekbone, composed of dense cortical bone and articulates with the zygomatic process of the maxilla |
| Genial tubercles | Mandible, ring-shaped radiopacity below apices of mandibular incisors Tiny bumps of bone on the lingual aspect of mandible |
| Lingual foramen | Mandible, small radiolucent dot inferior to apices of incisors Tiny opening or hole in the bone located on the internal surface of the mandible |
| Mental ridge | Mandible, thick radiopaque band from premolar region to incisor region Linear prominence of cortical bone located on the external surface of the anterior portion of the mandible |
| Mental fossa | Mandible, radiolucent area above the mental ridge Scooped-out depression of bone located on the external surface of the anterior mandible |
| Mental foramen | Mandible, small round radiolucent area in the apical region of premolars Opening or hole in bone located on the external surface of the mandible in the region of the premolars |
| Mandibular canal | Mandible, radiolucent band outlines by two thin radiopaque Tube-like passageway through bone that travels the length of the mandible |
| Mylohyoid ridge | Mandible, dense radiopaque band extends from third molar to second premolar Linear prominence of bone located on the external surface of the mandible |
| External oblique ridge | Mandible, radiopaque band from anterior ramus of mandible Linear prominence of bone located on the external surface of the body of the mandible |
| Anterior border of the ramus | Mandible, slightly radiopaque vertical band posterior to the maxillary and mandibular molar Extends vertically downward from the coronoid process to the external oblique ridge |
| Submandibular fossa | Mandible, radiolucent area in the molar region below mylohyoid ridge Scooped-out depression area of bone located on the internal surface of the mandible inferior to the mylohyoid ridge |
| Coronoid process | Mandible, triangle radiopacity superimposed over maxillary tuberosity region Prominence of bone on the anterior ramus of the mandible |
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