DANB Exam Questions With ANSWERs Latest Updated | (GRADED A+) |
2026/2027 Update
Radiopaque Structures - ANSWER Dense structures. Allow less radiant energy to pass through.
Electrons reach receptor with less energy. Results in white (light) image.
Radiolucent Structures - ANSWER Less dense structures. Allow radiant energy to pass through.
Electrons reach image receptor with high energy, causing dark image.
Mandible - ANSWER Single bone of lower jaw. Radiopaque.
Maxilla - ANSWER Two bones that form upper jaw and part of palate. Joined at midline by the
maxillary suture. Radiopaque.
Ramus - ANSWER Vertical portion at each end of mandible. Radiopaque.
Body of mandible - ANSWER Curved portion of mandible that connects rami. Radiopaque.
Condyle of mandible - ANSWER Ball-like top of ramus which forms the hinge between temporal bone
and mandible. Part of TMJ. Appears in extraoral images. Radiopaque.
Midsagittal Plane - ANSWER midline, divides the body into equal left and right halves
Orbit - ANSWER Eye cavity, extraoral images. Radiolucent.
Frankfort Plane - ANSWER Imaginary line from bottom of eye socket to the ear canal.
Inverted Y - ANSWER Junction of lateral wall of nasal fossa and wall of maxillary sinus. Above
maxillary canine. Radiopaque.
Maxillary Sinus - ANSWER Air-filled cavity above maxillary premolar and molars. Radiolucent, outline
radiopaque.
, Nutrient Canals - ANSWER Passageways through bone that supply teeth. Called pulp tissue once they
enter tooth. Radiolucent vertical lines.
Internal Oblique Ridge - ANSWER Line of bone on internal aspect of mandible. Near apices of molars.
Radiopaque band may run parallel to external oblique ridge.
Mandibular Canal - ANSWER Passageway through bone extending length of mandible for inferior
alveolar nerve. Radiolucent band outlined by two radiopaque lines (cortical bone lining).
External Oblique Ridge - ANSWER Radiopaque band near crown of mandibular molars. Line of bone
on external aspect of mandible.
Alveolar Ridge - ANSWER Bony ridge that contains alveoli (tooth sockets). Radiopaque.
Mental process - ANSWER Line of bone on external surface of anterior mandible. Thick radiopaque
band (upside down V)
Mental Foramen - ANSWER Two openings on mandible supplying lower lip with blood vessels.
Located in apical region of mandibular premolars. Small round radiolucent area.
Zygoma - ANSWER Cheek bone. Radiopaque on extraoral images.
Coronoid Process - ANSWER Bone projecting from anterior ramus. Radiopaque triangle on or below
maxillary tuberosity.
Zygomatic process of maxilla - ANSWER Boney projection portion of cheekbone. Above maxillary
molars, anterior to zygoma. J or U shaped radiopaque structure.
Maxillary tuberosity - ANSWER Round bone on the alveolar ridge. Posterior to maxillary molars.
Radiopaque.
Enamel - ANSWER Calcified structure that covers crown of tooth. Hardest tissue. Radiopaque.
2026/2027 Update
Radiopaque Structures - ANSWER Dense structures. Allow less radiant energy to pass through.
Electrons reach receptor with less energy. Results in white (light) image.
Radiolucent Structures - ANSWER Less dense structures. Allow radiant energy to pass through.
Electrons reach image receptor with high energy, causing dark image.
Mandible - ANSWER Single bone of lower jaw. Radiopaque.
Maxilla - ANSWER Two bones that form upper jaw and part of palate. Joined at midline by the
maxillary suture. Radiopaque.
Ramus - ANSWER Vertical portion at each end of mandible. Radiopaque.
Body of mandible - ANSWER Curved portion of mandible that connects rami. Radiopaque.
Condyle of mandible - ANSWER Ball-like top of ramus which forms the hinge between temporal bone
and mandible. Part of TMJ. Appears in extraoral images. Radiopaque.
Midsagittal Plane - ANSWER midline, divides the body into equal left and right halves
Orbit - ANSWER Eye cavity, extraoral images. Radiolucent.
Frankfort Plane - ANSWER Imaginary line from bottom of eye socket to the ear canal.
Inverted Y - ANSWER Junction of lateral wall of nasal fossa and wall of maxillary sinus. Above
maxillary canine. Radiopaque.
Maxillary Sinus - ANSWER Air-filled cavity above maxillary premolar and molars. Radiolucent, outline
radiopaque.
, Nutrient Canals - ANSWER Passageways through bone that supply teeth. Called pulp tissue once they
enter tooth. Radiolucent vertical lines.
Internal Oblique Ridge - ANSWER Line of bone on internal aspect of mandible. Near apices of molars.
Radiopaque band may run parallel to external oblique ridge.
Mandibular Canal - ANSWER Passageway through bone extending length of mandible for inferior
alveolar nerve. Radiolucent band outlined by two radiopaque lines (cortical bone lining).
External Oblique Ridge - ANSWER Radiopaque band near crown of mandibular molars. Line of bone
on external aspect of mandible.
Alveolar Ridge - ANSWER Bony ridge that contains alveoli (tooth sockets). Radiopaque.
Mental process - ANSWER Line of bone on external surface of anterior mandible. Thick radiopaque
band (upside down V)
Mental Foramen - ANSWER Two openings on mandible supplying lower lip with blood vessels.
Located in apical region of mandibular premolars. Small round radiolucent area.
Zygoma - ANSWER Cheek bone. Radiopaque on extraoral images.
Coronoid Process - ANSWER Bone projecting from anterior ramus. Radiopaque triangle on or below
maxillary tuberosity.
Zygomatic process of maxilla - ANSWER Boney projection portion of cheekbone. Above maxillary
molars, anterior to zygoma. J or U shaped radiopaque structure.
Maxillary tuberosity - ANSWER Round bone on the alveolar ridge. Posterior to maxillary molars.
Radiopaque.
Enamel - ANSWER Calcified structure that covers crown of tooth. Hardest tissue. Radiopaque.
