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Intraoral Radiographic Anatomy
Summary of Mandibular Landmarks

Course Authors: Gail F. Williamson, RDH, MS

Summary of Mandibular Landmarks

Table 2. Summary of Mandibular Radiographic Landmarks.
Landmark Brief Description Radiolucent / Radiopaque Periaplical Bilateral / Unilateral Alternate Name
External Oblique Ridge Diagonal Line Radiopaque Molar Bilateral Exteranal Oblique Line
Genial Tubercle Doughnut-shaped Radiopaque Cental Incisor Uniilateral Mental Spine
Inferior Border of Mandible Horizontal Band Radiopaque Any Mandibular Bilateral Lower Border
Internal Oblique Ridge Diagonal Line Radiopaque Molar Bilateral Mylohyoid Line
Lingual Foramen Pinpoint dot Radiolucent Central Incisor Bilateral  
Mandibular Canal Tubular Radiolucent Premolar
Molar		 Bilateral Inferior Alveolar Nerve Canal
Mental Foramen Circular Radiolucent Premolar
Canine		 Bilateral  
Mental Fossa Diffuse Radiolucent Central Incisor Unilateral  
Mental Ridge Inverted V Radiopaque Central Incisor
Lateral Incisor
Canine		 Bilateral  
Submandibular Fossa Diffuse Radiolucent Premolar
Molar		 Bilateral Submandibular Gland
Fossa
Mandibular Fossa
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