Quiz 2 Flashcards
Radiopaque
The light/white portion of a radiograph; resists the passage of x-ray beam
Radiolucent
The dark/black portion of a radiograph; readily permits the passage of x-rays; lacks density
Cortical bone aka
Cribriform plate
Lamina dura
Cortical bone
Means outer layer, appears solid white on radio graphs
Cancellous bone
Means spongy bone, located between layers of cortical bone, less dense than cortical bone
Process
A marked prominence or projection of bone
Ridge
A linear prominence or projection of bone
Spine
A sharp thorn like projection of bone
Tubercle
A small bump or nodule
Tuberosity
A rounded prominence of bone
Canal
Tube like passageway through bone that contains nerves and blood vessels
Foramen
An opening or hole in bone that permits passage of nerves and blood vessels
Fossa
A broad, shallow, scooped out , or depressed area of bone
Sinus
A hollow space or cavity or recess in bone
Septum
A bony wall or partition that divides two spaces or cavities; appears radiopaque
Suture
An immovable joint that represents a line of union between two adjoining bones of the skull
Ala tragus line
Line extending from the tragus of the ear to the ala of the nose; machine lines parallel to it
Intra oral films
Mid sagittal plane perpendicular to the floor; occlusal plane parallel to the floor
Extra oral films
Ala tragus line parallel to predetermined spot on machine
Enamel
Radiopaque, most dense structure, thin layer that covers the teeth
Dentin
Internal portion of tooth-radiopaque less dense than enamel
Cementum
Unable to see (less dense than dentin)
Pulp
In center of tooth; Radiolucent; composed of nerves and blood vessels; soft tissue in center of tooth
Lamina dura
Made of cortical bone (radiopaque) immediately surrounds the root (thin white line)
Cancellous bone
“Arranged like a lattice; spongy bone; less radiopaque than lamina dura
Cortical bone
Compact or dense form of bone, lines the outside layers of maxillary and mandible arches
Alveolar bone
Radiopaque, composed of cortical and cancellous bone, how teeth are maintained in the jaw
Incisive canal foramen
Appears as a small, ovoid Radiolucent area between the roots of maxillary central incisors
Median palatine suture
Thin Radiolucent line extending posteriorly through the midline I the palate
Nasal fossa
Empty space above the transverse radiopaque band across the palate
Nasal septum
Radiopaque vertical line that divides the nasal cavity into left and right sides. May superimpose over the median palatal suture
Maxillary sinus
Radiolucent air space above the apices of the premolar and molars
Inverted Y
Intersection of maxillary sinus and nasal cavity
Malar bone; zygomatic bone
Appears as a diffuse radiopaque band extending posteriorly from zygomatic process of the maxilla
Zygomatic process
U shaped radiopacity located superior to the maxillary first molar region; superimposed over the molar root tips
Maxillary tuberosity
Radiopaque bulge distal to third molar region
Hamular process
Appears as a radiopaque hooklike projection posterior to maxillary tuberosity
Coronoid process
Triangle-shaped radiopacity shows up only on maxillary molar periapical images
Lingual foramen
Little Radiolucent dot underneath mandibular incisors
Genial tubercles
Radiopaque, surrounds the lingual foramen
Mental ridge
Linear prominence of cortical bone on the external surface of the anterior portion of the mandible
Inferior border of the mandible
Cortical bone
Lingual foramen
Radiolucent between the apices of the central incisors
Genial tubercles
Tiny bumps of bone that surrounds the lingual foramen
Mental ridge
Thick band that extends from premolar region to incisor region
Mental foramen
Small, ovoid or round Radiolucent area located in apical region of mandibular premolars
Internal oblique ridge
Radiopaque band that extends distal from last molar
External oblique ridge
Radiopaque band extending straight down
Mylohyoid ridge
Radiopaque band in the mandibular molar region
Mandibular canal
Outlined by two thin radiopaque lines that represent the cortical walls of the canal
