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a marked prominence of bone located posterior and inferior to the TMJ. a part of the temporal bone
mastoid process
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appears as a rounded radiopacity located posterior and inferior to the TMJ; not seen on PS
mastoid process
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a long pointed and sharp projection of bone that extends from the temporal bone anterior to the mastoid process; not seen on PA
styoloid process
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appears as a long radiopaque spine that extends from the temporal bone anterior to the mastoid process
Styloid process
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a hole or opening in the temporal bone located superior and anterior to the mastoid process
external auditory/acoustic meatus
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appears as a round to ovoid radiolucency anterior and superior to the mastoid process; is not seen on PA
external acoustic meatus
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a concave, depressed area of the temporal bone. The mandibular condyle rests here. it is located anterior to the mastoid process and external acoustic meatus
glenoid fossa
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appears as a concave radiopacity superior to the mandibular condyle. not seen on PA
glenoid fossa
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a rounded projection of the temporal bone, located anterior to the glenoid fossa
articular eminence
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appears as a rounded radiopaque projection of the bone anterior to the glenoid fossa. not seen on PA
articular eminence
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a wing shaped bony projection of the sphenoid bone located distal to the maxillary tuberosity region
lateral pterygoid plate
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appears as a radiopaque projection of bone distal to the maxillary tuberosity region. not seen on PA
lateral pterygoid plate
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a narrow space or cleft that separates the lateral pterygoid plate and the maxilla
pterygomaxillary fissure
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appears as a radiolucent area between the lateral pterygoid plate and the maxilla. The zygoma is often superimposed on this region and obscures it
pterygomaxillary fissure
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a rounded prominence of bone that extends posterior to the 3rd molar region
maxillary tuberosity
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appears as a radiopaque bulge distal to third molar region
maxillary tuberosity
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a hole or opening in bone found inferior to the border of the orbit
infraorbital foramen
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appears as a round or ovoid radiolucency inferior to the orbit, it may be superimposed over the maxillary sinus; not seen on PA
infraorbital foramen
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the bony cavity that contains the eye ball
orbit
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appears as a round radiolucent compartment with radiopaque borders located superior to the maxillary sinuses; on most panoramic films the inferior border of this is visible as a radiopaque line
orbit
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a passageway through bone that extends from the superior foramina of the incisive canal to the incisive foramen
incisive canal
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appears as a tube like radiolucent area with radiopaque borders. located between the central incisors
incisive canal
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an opening or hole in bone that is located at the midline of the anterior portion of the hard palate directly posterior to the maxillary central incisors
incisive foramen
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appears as a small ovoid or round radiolucency located between the roots of maxillary central incisors
incisive foramen
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a sharp bony projection of the maxilla located at the anterior and inferior portion of the nasal cavity
anterior nasal spine
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appears as a V shaped radiopaque area located at the intersection of the floor of the nasal cavity and nasal septum
anterior nasal spine
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a pear shaped compartment of bone located superior to the maxilla
nasal cavity
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appears as a large radiolucent area above the maxillary incisors
nasal cavity
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a vertical bony wall or partition that divides the nasal cavity into the right and left nasal fossae
nasal septum
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appears as a vertical radiopaque partition that divides the nasal cavity
nasal septum
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a bony wall that separates the nasal cavity from the oral cavity
hard palate
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appears as a horizontal radiopaque band superior to the apices of the maxillary teeth
hard palate
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paired cavities or compartments of bone located within the maxilla and are located above the maxillary premolar and molar teeth
maxillary sinuses
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appears as paired radiolucent located above the apices of the maxillary premolars and molars. the floor of this is composed of dense cortical bone and appears as a radiopaque line
maxillary sinuses
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a bony projection of the maxilla that articulates with the zygoma or malar (cheek) bone
zygmatic process of the maxilla
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appears as a J or U shaped radiopacity located superior to the maxillary first molar region
zygomatic process
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the cheek bone and articulates with the zygomatic process
zygoma
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appears as a radiopaque band that extends posteriorly from the zygomatic process
zygoma
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a small hook like projection ob bone that extends from the medial pterygoid plate of the sphenoid bone. located posterior to the maxillary tuberosity
hamulus
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appears as a radiopaque hook like projection posterior to the maxillary tuberosity area
hamulus
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rounded projection of bone extending from the posterior superior border of the ramus of the mandible. articulates with the glenoid fossa of the temporal bone
mandibular condyle
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appears as a bony rounded radiopaque projection extending from the posterior border of the ramus of the mandible; not seen on PA
mandibular condyle
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a scooped out concavity of bone located distal to the coronoid process of the mandible
coronoid notch
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appears as a radiopaque concavity located distal to the coronoid process on the superior border of the ramus
coronoid notch
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a marked prominence of bone found on the anterior superior ramus of the mandible
coroniod process
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appears as a triangular radiopacity posterior to the maxillary tuberosity region
coronoid process
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a round or ovoid hole in bone on the lingual aspect of the ramus of the mandible
mandibular foramen
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appears as a round or ovoid radiolucency centered within the ramus of the mandible; not seen on PA
mandibular foramen
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a small tongue shaped projection of bone seen adjacent to the mandibular foramen
lingula
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appears as an indistinct radiopacity anterior to the mandibular foramen; not seen on PA
lingula
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a tube like passageway through bone that travels the length of the mandible. it extends from the mandibular foramen to the mental foramen, and houses the inferior alveolar nerve and blood vessels
mandibular canal
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appears as a radiolucent band outlinded by two thin radiopaque lines representing the cortical walls of the canals
mandibular canal
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an opening or hole in bone located on the external surface of the mandible in the area of the mandibular premolars
mental foramen
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appears as a small ovoid or round radiolucency located in the apical region of the mandibular premolars
mental foramen
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a linear prominence of cortical bone located on the external surface of the anterior portion of the mandible that extends from the premolar region to the midline
mental ridge
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appears as a thick radiopaque band that extends from the mandibular premolar region going to the incisor region
mental ridge
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a scooped out depressed area of bone located on the external surface of the anterior mandible above the mental ridge in the mandibular incisive region
mental fossa
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appears as a radiolucent area above the mental ridge
mental fossa
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a tiny opening or hole in bone located on the internal surface of the mandible near the midline
lingual foramen
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appears as a small radiolucent dot located inferior to the apices of the mandibular incisors
lingual foramen
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tiny bumps of bone located on the lingual aspect of the mandible
genial tubercles
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appear as a ring shaped radiopacity surrounding the lingual foramen
genial tubercles
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a linear prominence of cortical bone that defines the lower border of the mandible
inferior border of the mandible
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appears as a dense radiopaque band that outlines the lower border of the mandible
inferior border of the mandible
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linear prominence of bone located on the internal surface of the mandible that extends from the molar region downward and forward toward the lower border of the mandibular symphisis
mylohyoid ridge
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appears as a dense radiopaque band that extends downward and forward from the molar region
mylohyoid ridge
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a linear prominence of bone located on the internal surface of the mandible that extends downward and forward from the ramus
internal oblique ridge
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appears as a dense radiopaque band that extends downward and forward from the ramus
internal oblique ridge
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a linear prominence of bone located on the external surface of the body of the mandible
external oblique ridge
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appears as a dense radiopaque band that extends downward and forward from the anterior border of the ramus of the mandible
external oblique ridge
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the area of the mandible where the body meets the ramus
angle of the mandible
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appears as a radiopaque bony structure where the ramus joins the body of the mandible
angle of mandible
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air space found between the palate and tongue
palatoglossal air space
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appears as a horizontal radiolucent band located above the apices of the maxillary teeth
palatoglossal air space
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refers to the portion of the pharynx located posterior to the naso cavity
nasopharyngeal air space
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appears as a diagnol radiolucency located superior to the radiopaque shado of the soft palate and uvula
nasopharyngeal air space
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the portion of the pharynx located posterior to the tongue and oral cavity
glossopharyngeal airspace
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appears as a vertical radiolucent band superimposed over the ramus of the mandible. it is continuous with the nasopharyngeal air space superiorly and the palatoglossal space inferiorly
glossopharyngeal space
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a movable muscular organ found attached to the floor of the mouth
tongue
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appears as a radiopaque area superimposed over the maxillary posterior teeth
tongue
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form a muscular curtain that separates the oral cavity from the nasal cavity
soft palat and uvula
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appear as a diagnol radiopacity projecting posteriorly and inferiorly from the maxillary tuberosity region
soft palate and uvula
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formed by the position of the patients lips
lipline
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seen in the region of the anterior teeth appear more radiolucent in areas of teeth not covered by this, and appear more radiopaque in areas that are
lipline
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appear as a radiopaque shadow that projects anteriorly and inferiorly from the mastoid process, veiwed superimposed over the styloid process
ear
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