A thin dense line of bone indicating the border of the maxillary sinus
Floor or inferior border fo the sinus
The thin radiolucent line that traverses down the center of the palate at the junction of the right and left maxilla
Median Palatine Suture
Small round radiolucency in the center of the genial tubercles apical to the mandibular central incisors
Lingual foramen
Four small, bony crests on the lingual surface of the mandible that serve for muscle attachment
Genial tubercles
Compact or dense bone lines the outer layers of the maxillae and mandible
Cortical bone
Thin line that represents a wall separating the sinus into two or more compartments
Septum
The round pear-shaped opening appearing between the apices of the central incisors
Incisive foramen
A depression on the labial aspect of the mandibular incisor area
Mental fossa
Appears as a horizontal radiopaque line extending from the premolar region to the symphysis (the midline of the mandible where the left and right sides of bone are fused together)
Mental ridge
Spongy bone that forms the bulk of the inner bone
Cancellous bone
A broad U- or J shaped band seen above or superimposed over the roots of the maxillary first and second molars
Zygomatic process
Large air space divided into two halves by the nasal septum
Nasal fossa
A small round radiolucent hole on the lateral side of the body of the mandible near apices of premolars
Mental foramen
A continuation of the anterior border of the ramus extending downward and forward on the lateral surface of the mandible
Oblique ridge
Bars or plates of bone that form compartments in the bone, giving bone a honeycomb appearance
Trabeculae
Continuous band with the zygoma and extending distally
Zygomatic arch
Area between the lateral incisors and canine representing a decreased thickness of bone in that area
Lateral fossa
A large irregularly shaped, slightly radiolucent area below the mylohyoid ridge and the apices of the molars
Submandibular fossa
A crest of bone serving as a muscle attachment on the lingual surface of the mandible in the molar region
Mylohyoid ridge
Alveolar process that is a portion of the maxilla or mandible that surrounds and supports the teeth
Lamina dura
A downward projection of the medial pterygoid plate
Hamulus
Large air-filled chambers inside the maxilla
maxillary Sinus
A canal that serves as a passage for blood vessels and nerves
Mandibular canal
A dense layer of cortical bone imaged when negative vertical angle is excessive or film is deep into floor of mouth
Inferior border of the mandible
Fibers that attach the teeth to the alveolus
Periodontal ligament (PDL) space