Intro to Dental Anatomy Video 2 Flashcards
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Questions and Answers

On the proximal surfaces (mesial and distal surfaces), the height of contour equates to what area?

Proximal contact

What are the 3 main functions of the height of contour? (Select all that apply)

  • Equate to the proximal contact (correct)
  • Assist in tooth decay
  • Channel food away from the gingival margin during mastication (correct)
  • Provide self-cleaning for the teeth (correct)

    • How are embrasures always referenced?

    By the contact areas.

    When adjacent teeth contact each other, what is the continuous space surrounding each contact area called?

    <p>Triangular embrasure spaces</p> Signup and view all the answers

    How many triangular embrasure spaces are there for every tooth?

    <p>4</p> Signup and view all the answers

    What are the names of the 4 separate triangular embrasure spaces? (Select all that apply)

    <p>Lingual Embrasure</p> Signup and view all the answers

    How are embrasures named?

    <p>By their position/location relative to the proximal contact.</p> Signup and view all the answers

    What is the main function of triangular embrasures?

    <p>To act as a channel for food to leave the area during mastication.</p> Signup and view all the answers

    What is the gingival embrasure also called?

    <p>Interproximal space.</p> Signup and view all the answers

    What is the interproximal space?

    <p>The space partially occupied by the interdental papilla.</p> Signup and view all the answers

    Healthy interproximal-gingival embrasure spaces are critical in what type of dentistry?

    <p>Cosmetic dentistry.</p> Signup and view all the answers

    What is the anatomical crown covered by?

    <p>Enamel.</p> Signup and view all the answers

    What can the anatomical crown be divided into?

    <p>Incisal/Occlusal 1/3, Middle 1/3, Cervical/Gingival 1/3.</p> Signup and view all the answers

    What is the structure underneath the enamel called?

    <p>Dentin.</p> Signup and view all the answers

    What is the middle of the tooth that contains the neurovascular bundle called?

    <p>Pulp cavity/Pulp chamber.</p> Signup and view all the answers

    What is the root of the tooth covered by?

    <p>Cementum.</p> Signup and view all the answers

    What can the root of the tooth be divided into?

    <p>Cervical Third, Middle Third, Apical Third.</p> Signup and view all the answers

    What structure is responsible for holding the tooth to the bone?

    <p>Periodontal ligament.</p> Signup and view all the answers

    What structure contains fibers that connect the tooth to the bone structure?

    <p>PDL (Periodontal Ligament).</p> Signup and view all the answers

    What is the space that houses the alveolar blood vessels and nerves coming into the tooth called?

    <p>Root canal/Root canal chamber.</p> Signup and view all the answers

    What components and locations on the major components of tooth anatomy should be memorized?

    <p>Refer to the provided photo.</p> Signup and view all the answers

    What 2 junctions does the referenced photo show? (Select all that apply)

    <p>Dento-enamel junction</p> Signup and view all the answers

    What is the anatomical crown?

    <p>The top portion of the tooth covered by enamel.</p> Signup and view all the answers

    What is the clinical crown?

    <p>The portion of the tooth that is visible in the oral cavity.</p> Signup and view all the answers

    The anatomical crown is dependent on the state of the surrounding tissue.

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

    The clinical crown is dependent on the height of the surrounding gingiva.

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

    Both the clinical crown and the anatomical crown are covered by?

    <p>Enamel.</p> Signup and view all the answers

    What type of crown is formed if a 5-year-old patient has upper central incisors that have yet to erupt?

    <p>Anatomical crown.</p> Signup and view all the answers

    What procedure is meant to fix the gummy appearance of teeth?

    <p>Crown lengthening.</p> Signup and view all the answers

    What is the mucogingival junction?

    <p>The junction between the attached gingiva and the alveolar mucosa.</p> Signup and view all the answers

    What are the 2 proximal surfaces of all teeth?

    <p>Mesial surface and distal surface</p> Signup and view all the answers

    The 2 proximal surfaces of the teeth are referenced against?

    <p>The midline</p> Signup and view all the answers

    Where does the facial midline run?

    <p>Between the central incisors on the upper maxilla and lower mandible.</p> Signup and view all the answers

    The proximal surface of the tooth that faces toward the midline is called?

    <p>Mesial surface</p> Signup and view all the answers

    The proximal surface of the tooth that is furthest from the midline is called?

    <p>Distal surface</p> Signup and view all the answers

    What are the mesial and distal tooth surfaces known collectively as?

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

    Why are the mesial and distal surfaces of the teeth called the proximal surfaces?

    <p>Because they touch adjacent teeth in the arch.</p> Signup and view all the answers

    What are proximal contacts?

    <p>The area on the proximal surfaces where adjacent teeth in the arch touch each other.</p> Signup and view all the answers

    What is the area on proximal surfaces where adjacent teeth in the arch touch each other called?

    <p>Proximal contacts</p> Signup and view all the answers

    Where is the greatest height of contour proximally?

    <p>Proximal contacts have the greatest height of contour.</p> Signup and view all the answers

    The greatest height of contour proximally usually coincides with what area of the tooth?

    <p>Proximal contacts</p> Signup and view all the answers

    Proximal contacts are important for what type of procedure?

    <p>Wax-ups</p> Signup and view all the answers

    The proximal contact areas are also usually the greatest heights of contours where?

    <p>On their respective proximal surfaces.</p> Signup and view all the answers

    What is the facial surface of the tooth?

    <p>The facial surface of the tooth faces the lips or cheeks.</p> Signup and view all the answers

    What are the 2 types of facial surfaces of a tooth?

    <p>Labial surface and buccal surface</p> Signup and view all the answers

    What is the labial surface of the tooth?

    <p>Facial surface of the anterior teeth that faces the lips.</p> Signup and view all the answers

    What is the buccal surface of the tooth?

    <p>Surface of a posterior tooth that faces the cheeks.</p> Signup and view all the answers

    What is the lingual surface of a tooth?

    <p>Surface that faces the tongue.</p> Signup and view all the answers

    What is the lingual surface of a tooth called on the maxillary teeth?

    <p>Palatal surface</p> Signup and view all the answers

    The facial surface can be referred to as the labial surface of what teeth?

    <p>Anterior teeth, including the incisors and canines.</p> Signup and view all the answers

    The facial surface may also be referred to as the buccal surface of what teeth?

    <p>Posterior teeth, including premolars and molars.</p> Signup and view all the answers

    At times, the lingual surface of the tooth may also be referred to as what surface?

    <p>Palatal surface</p> Signup and view all the answers

    How many tooth surfaces does each tooth have?

    <p>Five tooth surfaces.</p> Signup and view all the answers

    What are the 5 tooth surfaces of each tooth?

    <p>Mesial, distal, facial, lingual, occlusal/incisal.</p> Signup and view all the answers

    In an ideal occlusion, which tooth surfaces are frequently in contact with adjacent teeth?

    <p>The mesial surface and the distal surface.</p> Signup and view all the answers

    In most cases, the mesial surface of one tooth meets what surface of another tooth?

    <p>The distal surface.</p> Signup and view all the answers

    Normally, the mesial surface of one tooth meets contacts with the distal surface of another tooth, with the exception of?

    <p>At the midline with the central incisors.</p> Signup and view all the answers

    At the midline, the mesial surface of one tooth meets (contacts) with what tooth surface?

    <p>The mesial surface of another tooth.</p> Signup and view all the answers

    What teeth are examples of both mesial surfaces in contact with each other?

    <p>Teeth number 8 and 9, and teeth number 24 and 25.</p> Signup and view all the answers

    What is the occlusal surface?

    <p>Chewing surface of posterior back teeth.</p> Signup and view all the answers

    What is the incisal ridge/edge surface?

    <p>Biting surface of anterior front teeth.</p> Signup and view all the answers

    What are the 5 tooth surfaces called on an anterior tooth?

    <p>Mesial, distal, facial (labial), incisal ridge/edge, and lingual (palatal) surface.</p> Signup and view all the answers

    What are the 5 tooth surfaces called on a posterior tooth?

    <p>Mesial, distal, facial (buccal), occlusal, and lingual (palatal) surface.</p> Signup and view all the answers

    What two portions of teeth can be divided into thirds?

    <p>Crown of tooth and root of tooth.</p> Signup and view all the answers

    When looking from the labial surface or buccal aspect, how can the crown and root of the tooth be divided?

    <p>According to their location.</p> Signup and view all the answers

    The crown and root of a tooth can be divided into thirds from the incisal ridge/edge/occlusal surface of the crown to what bottom surface of the root?

    <p>The apex of the root.</p> Signup and view all the answers

    The root of a tooth can be divided into which thirds?

    <p>Cervical third, middle third, apical third.</p> Signup and view all the answers

    The crown of a tooth can be divided into which thirds?

    <p>Incisal/occlusal third, middle third, cervical/gingival third.</p> Signup and view all the answers

    What are the 4 important dimensions of a tooth?

    <p>Incisio-gingival dimension, mesio-distal dimension, facio-lingual dimension, bucco-lingual dimension.</p> Signup and view all the answers

    What is the incisogingival dimension?

    <p>Vertical dimension from the incised ridge/edge up to the gingival (gum).</p> Signup and view all the answers

    What is the mesiodistal dimension?

    <p>Horizontal dimension from the mesial surface of a tooth to the distal surface.</p> Signup and view all the answers

    What is the faciolingual dimension?

    <p>Horizontal dimension from the facial to the lingual surface, only for anterior teeth.</p> Signup and view all the answers

    What is the buccolingual dimension?

    <p>Horizontal dimension from the buccal surface to the lingual surface, only for posterior teeth.</p> Signup and view all the answers

    How many development lobes do most teeth have?

    <p>Four development lobes.</p> Signup and view all the answers

    Most teeth have 4 developmental lobes except?

    <p>Mandibular first molars (5 lobes), maxillary first molars with cusp of Carabelli (5 lobes), mandibular second premolars with 3 cusps (5 lobes).</p> Signup and view all the answers

    How many sets of teeth have 5 developmental lobes?

    <p>Three sets of teeth.</p> Signup and view all the answers

    How many lobes do mandibular first molars have?

    <p>Five developmental lobes.</p> Signup and view all the answers

    How many lobes do maxillary first molars only with the cusp of Carabelli have?

    <p>Five developmental lobes.</p> Signup and view all the answers

    How many lobes do mandibular second premolars have when three specific cusps are present?

    <p>Five developmental lobes.</p> Signup and view all the answers

    What is a line angle?

    <p>The junction between two adjacent crown surfaces.</p> Signup and view all the answers

    What is the line angle of an anterior tooth where the distal surface and the facial surface contact each other called?

    <p>Distolabial line angle.</p> Signup and view all the answers

    What is the line angle of an anterior tooth where the mesial surface and the incisal edge meet each other called?

    <p>Mesio-incisal line angle.</p> Signup and view all the answers

    When doing wax-ups, why are line angles important?

    <p>They determine the overall beauty/shape/contour of the tooth.</p> Signup and view all the answers

    Name the 8 line angles for the anterior teeth.

    <p>Mesiolabial, Mesiolingual, Mesio-incisal, Distolabial, Distolingual, Disto-incisal, Labio-incisal, Linguo-incisal.</p> Signup and view all the answers

    Name the 8 line angles for the posterior teeth.

    <p>Mesiobuccal, Mesiolingual, Mesio-occlusal, Distobuccal, Distolingual, Disto-occlusal, Buccoo-occlusal, Linguo-occlusal.</p> Signup and view all the answers

    In line angles, in anterior teeth, instead of using the term occlusal we use?

    <p>Incisal.</p> Signup and view all the answers

    In line angles, in posterior teeth, instead of using the term facial, we use the term?

    <p>Buccal.</p> Signup and view all the answers

    What tooth is this and what are the first line angle highlighted in the photo called?

    <p>Tooth #30 = Mandibular Right First Molar, Line angle 1 = Linguo-occlusal line angle.</p> Signup and view all the answers

    What tooth is this and what are the 2nd line angle highlighted in the photo called?

    <p>Tooth #30 = Mandibular Right First Molar, Line angle 2 = Mesio-occlusal line angle.</p> Signup and view all the answers

    What tooth is this and what are the first line angle highlighted in the photo called?

    <p>Tooth #8 = Maxillary Right Central Incisor, Line angle 1 = Labial-incisal line angle.</p> Signup and view all the answers

    What tooth is this and what are the second line angle highlighted in the photo called?

    <p>Tooth #8 = Maxillary Right Central Incisor, Line angle 2 = Disto-lingual line angle.</p> Signup and view all the answers

    What are point angles of the crown?

    <p>The junction of three adjacent tooth surfaces.</p> Signup and view all the answers

    How many point angles does every tooth have?

    <p>Four point angles.</p> Signup and view all the answers

    What are the 4 point angles of the anterior teeth?

    <p>Mesiolabio-incisal, Mesiolingual-incisal, Distolabio-incisal, Distolinguo-incisal.</p> Signup and view all the answers

    What are the 4 point angles of the posterior teeth?

    <p>Mesiobucco-occlusal, Mesiolinguo-occlusal, Distobucco-occlusal, Distolinguo-occlusal.</p> Signup and view all the answers

    What is the height of contour?

    <p>The location of the greatest curvature on each surface of the tooth.</p> Signup and view all the answers

    Where does the height of contour occur on all anterior teeth?

    <p>On the gingival/cervical third of both the facial surface and lingual surface.</p> Signup and view all the answers

    Where does the height of contour occur on all posterior teeth?

    <p>Facial/buccal surface on the gingival/cervical third and on the middle third of the lingual surface.</p> Signup and view all the answers

    What is another function of the height of contour dealing with embrasure?

    <p>The height of contour and the embrasure provide a degree of self-cleaning for the teeth.</p> Signup and view all the answers

    What is one function of the height of contour dealing with food?

    <p>To channel food away from the gingival margin during mastication/chewing.</p> Signup and view all the answers

    Study Notes

    Proximal Surfaces of Teeth

    • All teeth have two proximal surfaces: MESIAL (toward the midline) and DISTAL (away from the midline).
    • Proximal surfaces are referenced against the midline of the dental arch.
    • The facial midline runs between the central incisors in both the maxilla and mandible.

    Proximal Contacts and Importance

    • Proximal contacts refer to the areas where adjacent teeth in the arch touch each other.
    • The greatest height of contour occurs at these proximal contacts.
    • Proximal contacts are crucial for accurate wax-ups in dental procedures.

    Facial and Lingual Surfaces

    • The facial surface of a tooth faces the lips (labial surface for anterior teeth) or cheeks (buccal surface for posterior teeth).
    • Lingual surfaces correspond to palatal surfaces in maxillary teeth, facing the tongue.
    • Each tooth has a total of five surfaces: mesial, distal, facial, lingual, and either incisal or occlusal.

    Occlusion and Contact Points

    • In ideal occlusion, mesial and distal surfaces frequently contact adjacent teeth.
    • At the midline, the mesial surface of one central incisor meets the mesial surface of the opposite incisor.
    • Typically, the mesial surface of one tooth contacts the distal surface of an adjacent tooth.

    Dimensions and Lobes of Teeth

    • The key dimensions of a tooth include incisogingival, mesiodistal, faciolingual, and buccolingual.
    • Most teeth are formed from four developmental lobes, but specific teeth can have five.

    Line Angles

    • Line angles are junctions between two adjacent crown surfaces.
    • Anterior teeth have unique line angles, often replacing "occlusal" with "incisal."
    • Posterior teeth use "buccal" to refer to the facial surface.

    Point Angles and Height of Contour

    • Point angles are where three adjacent tooth surfaces meet, and each tooth has four point angles.
    • The height of contour is the location with the greatest curvature on each tooth surface, vital for maintaining oral health.
    • Anterior teeth have height of contour located on the gingival/cervical third, while posterior teeth have it on the buccal surface's cervical third and the lingual middle third.

    Embrasures

    • Embrasures are defined by the contact areas between adjacent teeth and consist of four triangular spaces surrounding each contact area.
    • These triangular embrasures facilitate food passage during chewing, helping to reduce impaction and protect gum tissue.
    • They are named based on their position related to the proximal contact area of the teeth.

    Functions of Key Structures

    • Height of contour serves to channel food away from the gingival margin and offers self-cleaning properties due to its curvature.
    • The overall geometrical features of teeth, including line angles, point angles, and embrasures, contribute to dental esthetics and functional dynamics during mastication.### Gingival Embrasures
    • Gingival embrasure is also referred to as the interproximal space.
    • The interproximal space is partially occupied by the interdental papilla, where food impaction commonly occurs.
    • Healthy interproximal spaces are vital in cosmetic dentistry; they contribute to aesthetic outcomes.

    Tooth Anatomy

    • The anatomical crown is covered by enamel, which serves as the outer protective layer.
    • The anatomical crown can be divided into three sections: incisal/occlusal third, middle third, and cervical/gingival third.
    • Dentin lies beneath the enamel, providing structure and support to the tooth.
    • The pulp cavity, or pulp chamber, contains the neurovascular bundle essential for tooth vitality.

    Tooth Root and Supporting Structures

    • The root of the tooth is covered by cementum, a calcified layer that anchors the tooth within the jawbone.
    • The root can also be divided into thirds: cervical third, middle third, and apical third.
    • The periodontal ligament (PDL) connects the tooth to the surrounding bone, providing stability and support.
    • PDL fibers embed within the cementum and bone, maintaining tooth position and health.

    Root Canal and Specific Tooth Structures

    • The root canal or root canal chamber houses the alveolar blood vessels and nerves, critical for tooth functioning and health.
    • Key junctions in tooth anatomy include the dento-enamel junction and the cemento-enamel junction.

    Clinical vs. Anatomical Crown

    • The anatomical crown refers to the portion of the tooth covered by enamel, independent of the gum tissue state.
    • The clinical crown is the visible portion of the tooth in the oral cavity, dependent on the height of the surrounding gingiva.
    • Both crowns are covered by enamel, but their definitions differ based on tissue influence.

    Crown Development and Procedures

    • In cases where a child's upper central incisors are not yet erupted, the enamel formed represents the anatomical crown.
    • Crown lengthening is a dental procedure used to correct the gummy appearance of teeth by increasing the clinical crown's visibility.

    Mucogingival Junction

    • The mucogingival junction demarcates the border between attached gingiva and alveolar mucosa, playing a role in periodontal health assessment.

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    Test your knowledge of dental anatomy with these flashcards based on Dr. Hancock's second video. This quiz covers essential terms and concepts, such as the proximal surfaces of teeth and the facial midline. Perfect for students and professionals looking to enhance their understanding of dental structures.

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