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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

Dr. Vandana Kumar, DDS, MS

Median Palatine Suture

Median Palatine Suture

incisive foramen
1 - Incisive Foramen

2 - Nasal septum

3 - Zygoma

Incisive Foramen
incisive fossa canine fossa
White arrows denote radiolucent area of incisive/canine fossa

Black arrows delineate margin of alar cartilage of the nose

Incisive Fossa & Canine Fossa
malar process zygomatic arch
Malar Process/Zygomatic Arch

1-White arrows denote the malar process

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

Genial tubercles

Lingual foramen

Mental Ridge

Genial tubercles

Lingual foramen

Mental Ridge

nutrient canals

mandibular tori

mental foramen
Mental Foramen
  • White arrows outline the mental foramen.
  • Black arrows outline apical pathology which is secondary to pulpal exposure from coronal caries
White arrows indicate external oblique ridge
  • Black arrows delineated internal oblique ridge
concepts of normal 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
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.

Hard Palate

Hyoid Bone

concept 3
Concept 3
  • Ghost Images are formed


concept 31
Concept 3

Ghost of contra-lateral ramus

Ghost of Hard Palate

concept 4
Concept 4

Soft tissue outlines are visualized

Examples: lips, nasolabial fold, dorsum of

tongue, soft palate, ear and ear lobe.

concept 41
Concept 4

Dorsum of tongue

Soft Palate

Nasolabial fold

concept 5
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 51
Concept 5

Platoglossal Airspace

Maxillary sinuses

Naso-pharyngeal Airspace

concept 6
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 61
Concept 6

Articular eminence


Glenoid fossa

Sigmoid notch

Cervical vertebrae

Mandibular foramen

Lingual Foramen

Hyoid bone

concept 7
Concept 7

Relative Radiolucencies and Radiopacities are seen

  • Machine components
    • Chin Rest
    • Lateral Positioning guides
    • Anterior Positioning guides
quiz time
Quiz Time
  • Write answers on a separate sheet of
  • paper
  • Make sure you do write your name and student ID number