anatomy of Mandible ,different parts of mandible, ramus of mandible, body of mandible, attachments of mandible

1. MANDIBLE
Dr SANA YASEEN
Anatomy dept

2. INTRODUCTION
◦ It is the largest and the strongest bone of the face.
◦ It has body , ramus, angle, condylar process and coronoid process
◦ It is th second bone to ossify in the body after clavical

4. BODY
◦ Each half of the body has
◦ 2 surface (OUTER/ External AND INNER/Inetrnal SURFACES) AND
◦ 2 borders (UPPER AND LOWER BORDERS).
OUTER SURFACE LANDMARKS:
◦ SYMPYSIS MENTI: faint ridge where two halves of the body meet anteriorly.
◦ MENTAL PROTUBERANCE: median triangular projection in midline .
◦ MENTAL FORAMEN: mental artery (branch of inferior alveolar artery branch of first
part of maxillary artery) and mental nerve (inferior alveolar nerve branch of
posterior division of mandibular nerve).
◦ OBLIQUE LINE: runs downward and forward towards MENTAL TUBERCLE.
◦ INCISIVE FOSSA: Depression below the incisor tooth.

7. INNER SURFACE LANDMARKS
◦ GENIAL TUBERCLES: posterior surface of symphysis menti is marked by 4 small
elevations (superior and inferior)/ mental spine.
◦ MYLOHYOID LINE: Prominent ridge that runs obliquely DOWNWARDS AND
FORWARDS below third molar tooth to medial area below GENIAL TUBERCLES
◦ SUBMANDIBULAR FOSSA: lodges the SUBMANDIBULAR GLAND
◦ SUBLINGUAL FOSSA: lodges SUBLINGUAL GLAND
◦ MYLOHYOID GROOVE: extends onto the body below MYLOHYOID LINE.

9. MEDIAL SURFACE LANDMARKS:
 MANDIBULAR FORAMEN.
 LINGULA
 MYLOHYOID GROOVE
 MANDIBULAR NOTCH

11. ◦ UPPER BORDER: bears sockets for the teeth
◦ LOWER BORDER: Also called as BASE. Near the midline base shows an
oval depression called DIGASTRIC FOSSA

13. RAMUS
◦ It is QUADRILATERAL in shape
◦ IT HAS TWO SURFACES: MEDIAL AND LATERAL
◦ IT HAS 4 BORDERS: UPPER ,LOWER,ANTERIOR AND POSTERIOR
◦ IT HAS 2 PROCESSES: CORONOID AND CONDYLOID
UPPER BORDER: thin and curved ownwards forming mandibular notch
LOWER BORER: backward continuation of base of mandible
ANTERIOR borer is thin while POSTERIOR borer is thick
CORONOID PROCESS: flettened traingular upward projection from the
anterosuperior part of ramus
CONYLOID PROCESS: strong upward projection from posterosuperior part of the
ramus. It has head and neck an takes part in TMJ.