Review of Radiographic Anatomy
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Review of Radiographic Anatomy. Dr. Vandana Kumar, DDS, MS. RESTORATIONS. Maxilla. Median Palatine Suture. Median Palatine Suture. Anterior Nasal Spine. Nasal Septum. Nasal Fossae. 1 - Incisive Foramen 2 - Nasal septum 3 - Zygoma. Incisive Foramen. Nose Border & Alar Cartilage.

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Review of Radiographic Anatomy

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Review of Radiographic Anatomy

Dr. Vandana Kumar, DDS, MS



Median Palatine Suture

Median Palatine Suture

Anterior Nasal Spine

Nasal Septum

Nasal Fossae

1 - Incisive Foramen

2 - Nasal septum

3 - Zygoma

Incisive Foramen

Nose Border & Alar Cartilage

Lip Line

Nasolabial fold

Soft tissue Shadows

White arrows denote radiolucent area of incisive/canine fossa

Black arrows delineate margin of alar cartilage of the nose

Incisive Fossa & Canine Fossa

Maxillary Sinus

Antral Y/ Inverted Y

Malar Process/Zygomatic Arch

1-White arrows denote the malar process

2-Black arrows delineate the lower border of the zygomatic arch

Maxillary Tuberosity

Lateral Pterygoid Plate & Hamulus

Coronoid Process

Mandibular Bone

Inferior Border of Mandible

Genial tubercles

Lingual foramen

Mental Ridge

Genial tubercles

Lingual foramen

Mental Ridge

nutrient canals

mandibular tori

Mental Foramen

  • White arrows outline the mental foramen.

  • Black arrows outline apical pathology which is secondary to pulpal exposure from coronal caries

Mylohyoid line

  • White arrows indicate external oblique ridge

  • Black arrows delineated internal oblique ridge

Panoramic Anatomy

Concepts of Normal Panoramic Anatomy

Concept 1

Structures are flattened and spread out

Desirable: mandible, mandibular canal etc.

Undesirable: nasal turbinate and meati

Concept 2

Midline structures may be projected in two ways:

As single, midline structures

As bilateral structures

Concept 2

Zone of Single Images:

Single midline structures in this zone will appear on radiograph as single midline structures, e.g. incisor teeth, nasal fossa, anterior nasal spine, soft tissue of nose.

Zone of double Images:

Single midline structures in this zone will appear on the radiograph as bilateral (double) structures,

e.g. hyoid bone, palate, cervical spine

*Double images occur because the object lies between the center of rotation and the film twice during one exposure cycle.

Formation of Double Image

Hard Palate

Hyoid Bone

Concept 3

  • Ghost Images are formed



Concept 3

Ghost of contra-lateral ramus

Ghost of Hard Palate

Concept 4

Soft tissue outlines are visualized

Examples: lips, nasolabial fold, dorsum of

tongue, soft palate, ear and ear lobe.

Concept 4

Dorsum of tongue

Soft Palate

Nasolabial fold

Concept 5

Air spaces are visualized

  • Examples: maxillary sinus, nasal fossa, air space above tongue, naso-oro-hypopharynx

Posterior Pharyngeal wall

Palatoglossal air space

Nasopharyngeal air space

Glossopharyngeal air space

Concept 5

Platoglossal Airspace

Maxillary sinuses

Naso-pharyngeal Airspace

Concept 6

Areas adjacent to tooth bearing areas are visualized

  • Example: condyle, coronoid process, zygomatic arch, maxillary sinus, nasal fossa, orbit, styloid process, hyoid bone.

Concept 6

Articular eminence


Glenoid fossa

Sigmoid notch

Cervical vertebrae

Mandibular foramen

Lingual Foramen

Hyoid bone

Concept 7

Relative Radiolucencies and Radiopacities are seen

  • Machine components

    • Chin Rest

    • Lateral Positioning guides

    • Anterior Positioning guides

Concept 7

Quiz Time

  • Write answers on a separate sheet of

  • paper

  • Make sure you do write your name and student ID number


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