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Mandible Bone Anatomy

Introduction to Mandible Bone Anatomy:

  • image descriptionThe Mandible (L., mandere – to chew) is the facial bone that forms the lower jaw and contains the lower teeth.
  • It consists of right and left halves that fuse together early in life. The anterior portion of the mandible, called the body, is horseshoe-shaped and runs horizontally.
  • At the posterior ends of the body are two vertical or perpendicular extensions called rami (singular; ramus).
Mandible bone - Overview
Mandible bone - Overview - Colored
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Markings of the Mandible Bone:

[Lateral view]:

  1. image descriptionRamus – the posterior vertical portion of mandible.
Mandible bone - Lateral view
Ramus - Mandible bone - Lateral view
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  1. image descriptionBody – the horseshoe-shaped, anterior portion of mandible.
Mandible bone - Lateral view
Body - Mandible bone - Lateral view
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  1. image descriptionAngle – the region of mandible where the ramus and body join.
Mandible bone - Lateral view
Angle - Mandible bone - Lateral view
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  1. image descriptionCondylar (condyloid) process – the  posterior extension of the mandibular ramus, consisting of a narrow neck and a rounded head.
Mandible bone - Lateral view
Condylar process - Mandible bone - Lateral view
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  1. image descriptionMandibular condyle – rounded head of the condylar process; articulates with the mandibular fossa of the temporal bone at the temporomandibular joint (TMJ).
Mandible bone - Lateral view
Mandibular condyle Mandible bone - Lateral view
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  1. image descriptionCoronoid process – sharply angled anterior extension from the mandibular ramus; attachment point for the temporalis muscle.
Mandible bone - Lateral view
Coronoid process - Mandible bone - Lateral view
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  1. image descriptionMandibular notch – prominent down-ward curvature between the condylar and coronoid processes.
Mandible bone - Lateral view
Mandibular notch - Mandible bone - Lateral view
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  1. image descriptionMandibular foramen – opening on the medial surface of the ramus; passageway for the inferior alveolar nerve and artery, which supply the lower teeth.
Mandible bone - Lateral view
Mandibular foramen - Mandible bone - Lateral view
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  1. image descriptionMylohyoid ridge (line) – ridge along medial surface of body and lower ramus; attachment point for the mylohyoid muscle.
Mandible bone - Lateral view
Mylohyoid ridge - Mandible bone - Lateral view
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  1. image descriptionAlveolar process (margin, ridge, border) – superior aspect of the body that contains the sockets (alveoli) for the lower teeth.
Mandible bone - Lateral view
Alveolar process - Mandible bone - Lateral view
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  1. image descriptionMental foramen – hole on the anterior aspect of mandible below the second premolar;  passageway  for the mental nerves and vessels, which exit and supply the chin and low lip.
Mandible bone - Lateral view
Mental foramen - Mandible bone - Lateral view
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[Anterior view view]:

  1. image descriptionAlveolar process (margin, ridge, border) – inferior extension that contains sockets (alveoli) for lower teeth.
Mandible bone - Anterior view
Alveolar process - Mandible bone - Anterior view
Alveolar process - Mandible bone - Anterior view colored
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  1. image descriptionMental protuberance – raised, triangular-shaped eminence on the lower anterior surface.
Mandible bone - Anterior view
Mental protuberance - Mandible bone - Anterior view
Mental protuberance - Mandible bone - Anterior view colored
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  1. image descriptionMental tubercle – raised bases of the mental protuberance.
Mandible bone - Anterior view
Mental tubercle - Mandible bone - Anterior view
Mental tubercle - Mandible bone - Anterior view colored
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  1. image descriptionMental foramen – hole on the anterior aspect of the bone below the second premolar; passageway for the mental nerve and vessels.
Mandible bone - Anterior view
Mental foramen - Mandible bone - Anterior view
Mental foramen - Mandible bone - Anterior view colored
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Test yourself:

Lateral view: [ image descriptionShow / image descriptionHide ]

Mandible bone - Lateral view - Test yourself
Mandible bone - Lateral view - Test yourself - Answers
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Anterior view: [ image descriptionShow / image descriptionHide ]

Mandible bone - Anterior view - Test yourself
Mandible bone - Anterior view - Test yourself - Answers
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