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Sunday March 21, 2010 3:55 pm
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The Human Skull |
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The mandible or lower jaw consists to four major
portions, a left and right mandibular ramus and the left and right body. The
alveolar process of the body is that portion of the mandible which contains the
lower dentition. The junction of the ramus and the body occurs at the gonial
angle where externally one of the masseter muscles is attatched. The left and
right masseters make up a set of two sets of muscels used in chewing. At the
gonial angle on the internal surface the pterygoid attachements are found. These
attachements are for the medial and lateral pterygoid muscles which assist in
the grinding motion of chewing. The external surface of the mandibular body
possesses the mental foramen and at the midline, the mental protuberance or
chin. The internal surface of the body possesses the lingual foramen, the
mandibular canal, and the longitudinal running mylo-hyoid ridge. The genio
tubercle is located in the mid-sagittal plane on the internal surface of the
mandible. The superior margin of each ramus possesses both a mandibular condyle
or head, for articulaltion with the temporal bone at the tempro-mandibular
joint, and the coronoid process, for the attachement of the temporalis muscle
(one in the set of primary muscles used in mastication). The mandible
articulates with each of the maxillae by way of their contained respective lower
and upper dentition.
To view a QuickTime VR movie of the mandible bone click

The mandible touches, or articulates with, the following bones:


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