Dental Radiology Test Questions with Answers
External oblique ridge or external oblique line - Answer-linear prominence of bone on the external aspect of the mandible that extends down and forward from the anterior border of the ramus to the third molar root.
- Appears as a radiopaque band near t...
Dental Radiology Test Questions
with Answers
External oblique ridge or external oblique line - Answer-linear prominence of bone on
the external aspect of the mandible that extends down and forward from the anterior
border of the ramus to the third molar root.
- Appears as a radiopaque band near the crown of the mand molars downward and
forward from the anterior border of the ramus to the third molar area.
mental foramen - Answer-Two openings in the bone on the external mandible through
which blood vessels and nerves pass supplying the lower lip. Located in the apical
region of the mandibular premolars. Appears as a small round radiolucent area on the
mandibular premolar and can be confused with a periapical abscess if not recognized
correctly.
mental process or ridge - Answer-Linear prominence of bone on the external surface of
the anterior mandible that extents from the symphesis to the premolar region. Appears
as a thick radiopaque band (upside down V) that is superimposed on the anterior
mandibular teeth.
Nasal fossa - Answer-Two large depressions of bone located above the maxilla that are
divided by the nasal septum. Appears as two large radiolucent spaces above the roots
of the maxillary incisors on maxilary incisor or maxillary canine periapical radiographs
mental fossa - Answer-Depressed area of the bone on the external surface of the
mandible. Appears as a radiolucent area above the mental ridge on mandibular incisor
periapical radiographs and
Lateral fossa/canine fossa - Answer-slightly concave area in bone located below and
between the maxillary lateral incisors and the maxillary canines. Appears radiolucent on
the maxillary canine and incisor periapical radiographs.
Anterior nasal septum - Answer-a triangular projection from the floor of the nasal fossa
located at the junction of the nasal fossa and nasal septum. Appears as a v-shaped
radiopaque area on periapical radiographs of maxillary incisor region
Nasal septum - Answer-Bone structure that divides the right and left nasal fossa.
Portion that is visible is the vomer bone.
submandibular fossa - Answer-Depression in the bone on the lingual side of the
mandible in which the submandibular salivary glands are located. Appears as a large
, radiolucent area proximal to the roots of the molar region on mandibular periapical
radiographs.
mylohyoid ridge - Answer-Linear prominence of the bone on the internal aspect of the
mandible. The muscle attatches to the ridge which extends inferior and anterior from the
lower border of the mandibular symphysis. Appears as radiopaque band that may be
superimposed over the roots of the mandibular teeth
genial tubercles - Answer-small donut shaped rings of tiny spines of bone that surround
the lingual foramen and are located near the midline on the internal aspect of the
mandible. Appears radiopaque on mandibular incisor periapical radiographs
lingual foramen - Answer-small opening located in the midline of the internal aspect of
the mandible through which a branch of the incisive artery travels. Appears as a small
radiolucent dot in the center of the radiopaque rings of the genial tubercles.
Incisive foramen - Answer-Pear shaped opening in bone located at the midline of the
anterior hard palate, behind the central incisors. The nasopalatine nerve and vessels
exit the maxilla from the foramen. Appears radiolucent on maxillary incisor periapical
radiographs.
median palatal suture - Answer-Line of fusion between the palatine process of the right
and left maxilla. Appears as a radiolucent vertical line between the roots of the maxillary
incisors which extends to the posterior area of the hard palate on maxillary periapical
radiographs
hamulus/hamular process - Answer-Small, hook-shaped portion of bone extending from
the sphenoid bone down and located behind the maxillary tuberosity region.
enamel - Answer-the calcified structure that covers the crown of the tooth and protects
the dentin. The hardest calcified tissue in the human body.
dentin - Answer-mineralized tissue that makes up the entire body of the tooth and
extends the entire length of the tooth to protect the pulp. Covered by enamel at the
crown of the tooth and by cementum at the root. Harder than bone and cementum but
not as hard as enamel. Visible in both the crown and root of the tooth.
- Appears less radiopaque than enamel.
dentinoenamel junction - Answer-the line of demarcation where the enamel and dentin
meet.
- Not distinguishabke on an x-ray
pulp - Answer-the interior of the tooth that contains nerves, blood vessels, and
lymphatic tissue.
- Appears radiolucent.
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