Maxillary Posterior radiopaque features
Maxillary radiolucent features
Mandibular radiolucent features
Mandibular Posterior radiopaque features
General Features
100

A thin dense line of bone indicating the border of the maxillary sinus

Floor or inferior border fo the sinus

100

The thin radiolucent line that traverses down the center of the palate at the junction of the right and left maxilla

Median Palatine Suture

100

Small round radiolucency in the center of the genial tubercles apical to the mandibular central incisors

Lingual foramen

100

Four small, bony crests on the lingual surface of the mandible that serve for muscle attachment

Genial tubercles

100

Compact or dense bone lines the outer layers of the maxillae and mandible

Cortical bone

200

Thin line that represents a wall separating the sinus into two or more compartments

Septum

200

The round pear-shaped opening appearing between the apices of the central incisors 

Incisive foramen

200

A depression on the labial aspect of the mandibular incisor area

Mental fossa

200

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

200

Spongy bone that forms the bulk of the inner bone

Cancellous bone

300

A broad U- or J shaped band seen above or superimposed over the roots of the maxillary first and second molars

Zygomatic process

300

Large air space divided into two halves by the nasal septum

Nasal fossa

300

A small round radiolucent hole on the lateral side of the body of the mandible near apices of premolars

Mental foramen

300

A continuation of the anterior border of the ramus extending downward and forward on the lateral surface of the mandible

Oblique ridge

300

Bars or plates of bone that form compartments in the bone, giving bone a honeycomb appearance

Trabeculae

400

Continuous band with the zygoma and extending distally

Zygomatic arch

400

Area between the lateral incisors and canine representing a decreased thickness of bone in that area

Lateral fossa

400

A large irregularly shaped, slightly radiolucent area below the mylohyoid ridge and the apices of the molars

Submandibular fossa

400

A crest of bone serving as a muscle attachment on the lingual surface of the mandible in the molar region

Mylohyoid ridge

400

Alveolar process that is a portion of the maxilla or mandible that surrounds and supports the teeth

Lamina dura

500

A downward projection of the medial pterygoid plate

Hamulus

500

Large air-filled chambers inside the maxilla

maxillary Sinus

500

A canal that serves as a passage for blood vessels and nerves

Mandibular canal

500

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

500

Fibers that attach the teeth to the alveolus

Periodontal ligament (PDL) space