Dental Anatomy - Sheet 12
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Questions and Answers

What type of movements does the TMJ allow?

  • Hinge and rotational movement (correct)
  • Only hinge movement
  • Only rotational movement
  • No movement

    • The occlusal anatomy of teeth is simple in humans.

    False

    What is TMJ an abbreviation for?

    Temporomandibular joint

    The TMJ is specialized in humans and is involved in __________ movement.

    <p>hinge and rotation</p> Signup and view all the answers

    Match the following components of occlusal anatomy to their descriptions:

    <p>Molars = Teeth designed for grinding food Canines = Teeth for tearing food Incisors = Teeth for cutting food Premolars = Teeth that assist molars in grinding</p> Signup and view all the answers

    Which tooth structure increases the surface area of contact between the root and alveolar bone?

    <p>Trifurcated upper 6</p> Signup and view all the answers

    Incisal and occlusal forms of the teeth have no effect on jaw movements.

    <p>False</p> Signup and view all the answers

    What is the primary focus when comparing human jaw movements to those of animals?

    <p>The relation of tooth form and jaw relation.</p> Signup and view all the answers

    The ___ increases surface area of contact between the root and alveolar bone.

    <p>trifurcated upper 6</p> Signup and view all the answers

    Match the following terms with their descriptions:

    <p>Canine = Pointed tooth used for tearing Trifurcated upper 6 = Has three roots for stability Incisal = Front teeth designed for cutting Occlusal = Surface for biting and chewing</p> Signup and view all the answers

    What forms the apex of the triangle in dental anatomy?

    <p>The contact area of two teeth</p> Signup and view all the answers

    The base of the triangle in dental anatomy is located at the contact area of the two teeth.

    <p>False</p> Signup and view all the answers

    Where is the base of the triangle located in dental anatomy?

    <p>At the alveolar process between adjacent teeth.</p> Signup and view all the answers

    The sides of the triangle in dental anatomy are formed by the __________ of the teeth.

    <p>proximal surfaces</p> Signup and view all the answers

    Match the parts of the triangle in dental anatomy with their descriptions:

    <p>Base = Located at the alveolar process between adjacent teeth Sides = Formed by the proximal surfaces of the teeth Apex = At the contact area of the two teeth</p> Signup and view all the answers

    What does the facial view help to determine?

    <p>Relative position of the contact areas</p> Signup and view all the answers

    The facial view shows the position of contact areas in a mesiodistally direction.

    <p>False</p> Signup and view all the answers

    What areas do the contact areas relate to in a facial view?

    <p>Cervicoincisally and cervico-occlusally</p> Signup and view all the answers

    The facial view gives the relative position of the contact areas _____ and _____ .

    <p>cervicoincisally, cervico-occlusally</p> Signup and view all the answers

    Match the following descriptions with their terms:

    <p>Cervicoincisally = Vertical position from the cervical line to the incisal edge Cervico-occlusally = Vertical position from the cervical line to the occlusal surface Facial view = A perspective showing the front of the tooth Contact areas = Points where adjacent teeth touch</p> Signup and view all the answers

    Which geometric figure is NOT used to outline tooth crown aspects?

    <p>Square</p> Signup and view all the answers

    The Curve of Spee is viewed from a coronal aspect.

    <p>False</p> Signup and view all the answers

    Name the two types of imaginary occlusal curves discussed.

    <p>Curve of Spee and Curve of Wilson</p> Signup and view all the answers

    The Curve of Wilson is viewed from a __________ view.

    <p>coronal</p> Signup and view all the answers

    Match the imaginary occlusal curves with their descriptions:

    <p>Curve of Spee = Anteroposterior curve viewed laterally Curve of Wilson = Side-to-side curve viewed coronally</p> Signup and view all the answers

    What is one of the primary functions of embrasures during mastication?

    <p>To provide a spillway for the escape of food</p> Signup and view all the answers

    Embrasures help prevent food from being forced through the contact area.

    <p>True</p> Signup and view all the answers

    What is the effect of embrasures on the forces imparted on teeth during the reduction of hard food material?

    <p>They reduce the forces imparted on teeth.</p> Signup and view all the answers

    The extent of the curvature of the cervical line is greater in the ______ direction than the ______ direction in all teeth.

    <p>mesial, distal</p> Signup and view all the answers

    Match the following functions to their descriptions:

    <p>Provide spillway for food = Facilitates escape of food during mastication Reduce forces on teeth = Minimizes stress during chewing Prevent food forced through contact = Avoids food impaction between teeth Self-cleansing through saliva = Maintains oral hygiene</p> Signup and view all the answers

    Study Notes

    Dental Anatomy - Sheet 12

    • Sheet number: 12
    • Date: 2024
    • Written by: Lajneh Teejan
    • Edited by: Lajneh Wisdom
    • Doctor: Siham Al-Arag

    Physiology of Permanent Dentition

    • Form follows function: Teeth's morphology is adapted to their functions (mastication, deglutition, phonetics, aesthetics).
    • Masticatory system: A coordinated functional unit of the orofacial system.
    • Primary function of teeth: Preparing food for swallowing and facilitating digestion.
    • Adaptations:
      • Form: Different teeth have different shapes (incisors, canines, premolars, molars) suitable to their function.
      • Alignment: Proper alignment protects periodontal tissues, aids mastication, facilitates jaw movements, enhances speech, improves aesthetic appearance.
    • Crown and Root size: Proportionate to the jaws and each other
    • Canine roots: Long and wide for anchorage.
    • Molar roots: Multiple roots (trifurcated in some cases) for withstand masticatory forces
    • TMJ (Temporomandibular joint): Highly complex, increases complexity of tooth functions.

    Tooth Form and Jaw Movements

    • Incisal and Occlusal forms: Shapes influence jaw movements
    • Comparing human and animal jaws: Humans have unequal jaw sizes.
    • Maxillary vs Mandibular jaws: Maxillary arch (bigger) overlaps the Mandibular arch labially and buccally.

    Interproximal Spaces

    • Shape: Triangular/pyramidal (narrower mesio-distally at the cervix, wider occlusally).
    • Function: Accommodate and protect gingival tissue, allows for proper cleansing, prevents food impaction.
    • Gingival papilla: Fill interproximal space.
    • Col: Part of interdental tissues below contact area (only in posterior teeth).
    • Anterior vs posterior papilla: Anterior are pyramidal, Posterior are more broad
    • Proximal contacts: Mesial & Distal
    • Exceptions: Last molars only have mesial contacts.

    Embrasures/spillway

    • Shape: V-shaped/triangular space between adjacent teeth.
    • Functions:
      • Food escape during mastication
      • Reduce forces on teeth
      • Prevent food from being forced through contacts.
      • Self-cleansing
      • Protect gingiva

    Cervical Line Curvatures

    • Mesial-distal curvature: Greater mesially than distally
    • Distal vs Mesial curvature: Distal curvature is typically 1mm less than mesial curvature
    • Anterior vs Posterior: Anterior teeth have more pronounced curvature than posterior teeth.
    • Variation: Curvature variation depending on tooth type
    • Lack of curvature in molars: No curvature in molar region.

    Crown Geometries

    • Outline shapes: Triangular, trapezoid, rhomboid
      • Anterior teeth: Triangular outline
      • All teeth (Anterior & Posterior): Trapezoid outline
    • Posterior teeth (maxillary & mandibular): Rhomboid outline

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    Dental Anatomy PDF 2024

    Description

    Explore the essential aspects of the physiology of permanent dentition in this informative quiz. Learn about the adaptations of teeth, their various functions, and their anatomical features, including the roles of crowns and roots. Ideal for students and professionals in dental studies.

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