Anatomy of the Mandible
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Questions and Answers

Which of the following statements accurately describes the shape of the mandible?

  • Rectangular
  • Horseshoe-shaped (correct)
  • Triangular
  • Circular

    • What is the name of the joint through which the mandible articulates with the temporal bone?

  • Temporomandibular joint (TMJ) (correct)
  • Glenohumeral joint
  • Acromioclavicular joint
  • Atlanto-occipital joint

    • Which of these is NOT a feature of the mandible?

  • Is the only moveable bone of the skull
  • Serves as an attachment point for muscles of mastication
  • Is the largest and strongest bone of the face
  • Forms the upper jaw (correct)

    • What is the main function of the mandible?

    <p>Facilitating chewing and speech (D)</p> Signup and view all the answers

    What are the two main parts of the mandible?

    <p>Body and rami (D)</p> Signup and view all the answers

    Which of the following structures is found on the external surface of the mandible?

    <p>Mental Foramen (B)</p> Signup and view all the answers

    What is the function of the Coronoid Process?

    <p>Attachment point for the temporalis muscle (C)</p> Signup and view all the answers

    Which of the following structures are involved in the articulation of the mandible with the skull?

    <p>Condyle and Ramus (A)</p> Signup and view all the answers

    What is the name of the horizontal portion of the mandible?

    <p>Body (B)</p> Signup and view all the answers

    Which of the following structures on the mandible is responsible for housing the teeth?

    <p>Alveolar Process (D)</p> Signup and view all the answers

    Where is the Mental Foramen located?

    <p>At the midpoint of the inferior border of the mandible (B)</p> Signup and view all the answers

    What is the function of the Mylohyoid Ridge?

    <p>Attachment point for the mylohyoid muscle (C)</p> Signup and view all the answers

    Which of the following structures is a depression on the internal surface of the mandible?

    <p>Digastric Fossa (D)</p> Signup and view all the answers

    Which of the following structures is responsible for the formation of the chin?

    <p>Mental Protuberance (C)</p> Signup and view all the answers

    What is the name of the process that articulates with the mandibular fossa of the temporal bone?

    <p>Condyle (D)</p> Signup and view all the answers

    What is the function of the Submandibular Fossa?

    <p>Site of the submandibular salivary gland (A)</p> Signup and view all the answers

    What is the name of the bony bar that supports the condyle?

    <p>Neck (C)</p> Signup and view all the answers

    Which of the following is NOT a feature of the internal surface of the mandible?

    <p>Mental Foramen (D)</p> Signup and view all the answers

    Where is the Mandibular Foramen located?

    <p>At the midpoint of the Ramus (C)</p> Signup and view all the answers

    Which muscle originates from the Mental Spine?

    <p>Geniohyoid muscle (D)</p> Signup and view all the answers

    What is the function of the External Oblique Ridge?

    <p>Provides attachment for the masseter muscle (B)</p> Signup and view all the answers

    Flashcards

    Mandible

    The mandible is the lower jaw, single and largest bone of the face.

    Features of the Mandible

    Main features include being horseshoe-shaped, having a horizontal body and two rami.

    Movable Bone of Skull

    The mandible is the only moveable bone in the human skull.

    Temporomandibular Joint (TMJ)

    The mandible articulates with the temporal bone at the TMJ, enabling jaw movement.

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    Muscles of Mastication

    The mandible serves as the attachment point for muscles that aid in chewing.

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    Mandibular Teeth Articulation

    Mandibular teeth articulate with maxillary teeth for chewing.

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    Body of the Mandible

    The horizontal portion of the mandible forming a U-shaped structure.

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    Ramus of the Mandible

    The vertical part of the mandible that ascends from the body.

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    Coronoid Process

    A sharp, beak-like process anterior to the condyle for muscle attachment.

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    Condyle

    A roller-shaped process that articulates with the temporal bone.

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    Alveolar Process

    Houses teeth and consists of two bone plates joined by septa.

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    Mental Foramen

    An opening that transmits the mental nerve and artery.

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    Mental Protuberance

    The triangular elevation of bone commonly referred to as the chin.

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    Digastric Fossae

    Depressions reflecting bony origins of the digastric muscle.

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    Mylohyoid Ridge

    The ridge for attachment of the mylohyoid muscle involved in mouth floor support.

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    Submandibular Fossa

    A site for the submandibular salivary gland.

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    Mandibular Foramen

    An opening allowing passage for the inferior dental nerve and artery.

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    Mental Tubercle

    Small elevations on either side of the mental protuberance.

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    External Oblique Ridge

    A ridge of bone from the mental tubercle to the ramus.

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    Study Notes

    The Mandible

    • Forms the lower jaw
    • A single bone
    • The largest and strongest bone of the face
    • Horseshoe-shaped
    • Composed of a horizontal body and two rami (plural of ramus)
    • The only movable bone in the skull
    • Articulates with the temporal bone via the temporomandibular joint (TMJ)
    • Serves as an attachment point for mastication muscles

    GDC Learning Outcomes

    • Describe relevant dental, oral, craniofacial, and general anatomy
    • Explain application to patient management

    Intended Learning Outcomes

    • Describe the key features of the mandible
    • List the main parts of the mandible
    • List the range of movement of the mandible

    Key Parts of the Mandible

    • Body: Horizontal portion, right and left halves fused in the midline forming a U-shaped bone
    • Ramus: Ascending portions on each side of the body, topped by the condyle and coronoid process
    • Coronoid Process: Sharp, beak-like, anterior process to the body
    • Condyle: Roller-shaped process that articulates with the mandibular fossa of the temporal bone
    • Neck: Bar of bone supporting the condyle
    • Alveolar Process: Houses the teeth with facial (lateral) and lingual (medial) plates connected by bone septa

    Articulations of the Mandible

    • The temporal bone of the skull through a movable synovial joint, the temporomandibular joint.
    • Mandibular teeth articulate with those of the maxillary teeth.

    External Features

    • External oblique ridge: A ridge of bone originating at the mental tubercle and sweeping upwards, becoming the sharp anterior border.
    • Mental foramen: Located mid-inferior border/alveolar crest, transmitting the mental nerve
    • Mental protuberance: A triangular elevation of bone (the chin)
    • Mental tubercles: Small elevations on either side of the mental protuberance

    Internal Features

    • Digastric fossa: Small depressions on either side of midline, originating the anterior belly of the digastric muscle
    • Mental spine (Genial tubercles): Up to 4 separate spines or a single fused spine. The upper aspect originates the genioglossus muscle, the lower aspect originates the geniohyoid muscle
    • Mylohyoid ridge: Origin of the mylohyoid muscle (floor of anterior mouth).
    • Submandibular fossa (SMF): Site of submandibular salivary gland
    • Sublingual fossa (SLF): Site of sublingual salivary gland
    • Mandibular (Inferior dental) foramen: Oblique opening at the ramus midpoint, passing inferior dental nerve and artery.
    • Lingula: Lip of bone covering anterior edge.

    Movement of the Mandible

    (Specific details of movement are not provided in the materials.)

    • Links to YouTube videos about the Maxilla, the Mandible, and other related bone systems are presented.

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    Related Documents

    The Mandible - Tagged PDF

    Description

    Test your knowledge on the mandible's shape, features, and functions in this quiz. Learn about its articulation with the temporal bone and the key parts that make up this important bone in the human skull. Perfect for students of anatomy and dentistry.

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