Dentition Root Morphology Quiz
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Questions and Answers

What is the primary function of the pulp in terms of dentine?

  • Maintaining health of dentine through nutrition (correct)
  • Initiating and governing dentine repair
  • Triggering inflammatory and immune response
  • Conducting sensory impulses

    • At what point does the development of the tooth root begin?

  • After the formation of the apical papilla
  • During enamel organ formation
  • Prior to the formation of the enamel tissue
  • Following crown formation (correct)

    • What is the function of the HERS in tooth development?

  • Maintaining dentine health through nutrition
  • Triggering sensory impulses
  • Guiding root formation and determining root shape (correct)
  • Initiating dentine repair

    • What does the mesenchyme of the apical papilla differentiate into?

    <p>Odontoblasts with secretion of radicular dentine</p> Signup and view all the answers

    What is the function of the pulp in terms of dentine repair?

    <p>Initiating and governing dentine repair</p> Signup and view all the answers

    What is the anatomical boundary between the crown and the root?

    <p>Cementoenamel junction</p> Signup and view all the answers

    What is the function of the pulp in terms of defence?

    <p>Triggering inflammatory and immune response</p> Signup and view all the answers

    What is the name of the structure that guides root formation?

    <p>HERS (bilayer epithelial structure)</p> Signup and view all the answers

    What is the term for the removal of infected or inflamed tissues inside the tooth?

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

    What is the term for the removal of teeth from the existing dentition?

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

    What is the term for an additional root on the disto-palatal side of upper molars?

    <p>Radix Distolingualis</p> Signup and view all the answers

    What is the term for a tooth with an enlarged body and small roots?

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

    What is a characteristic of the roots of primary incisors and canines?

    <p>They are longer in proportion to their crown height than corresponding permanent teeth.</p> Signup and view all the answers

    What is a characteristic of the roots of primary molars?

    <p>They are widely divergent and extend beyond the dimensions of the crown.</p> Signup and view all the answers

    What is the term for roots that are bifurcated or trifurcated?

    <p>Apically displayed root bifurcations or trifurcations</p> Signup and view all the answers

    What is Radix Entemolaris?

    <p>An additional root on the disto-lingual side of lower molars.</p> Signup and view all the answers

    What is the term for roots that are bent or curved?

    <p>Dilacerated roots</p> Signup and view all the answers

    What is the importance of knowing the morphology of roots?

    <p>It is important for diagnosis and treatment planning</p> Signup and view all the answers

    What is Radix Paramolaris?

    <p>An additional root on the mesio-buccal side of lower molars.</p> Signup and view all the answers

    What is the author of the book 'The root canal dentition in permanent dentition'?

    <p>Versiani MA</p> Signup and view all the answers

    What is Radix Mesiolingualis?

    <p>An additional root on the mesio-palatal side of upper molars.</p> Signup and view all the answers

    Why do findings in literature often differ?

    <p>Due to differences in research techniques and populations involved.</p> Signup and view all the answers

    What is a characteristic of adult/permanent teeth?

    <p>They have more elastic bone.</p> Signup and view all the answers

    What is characteristic of the roots of permanent teeth compared to primary teeth?

    <p>They are shorter and more delicate.</p> Signup and view all the answers

    What is the title of the 2006 edition book authored by Cohen S, Hargreaves K, and Keiser K?

    <p>Pathways of the pulp</p> Signup and view all the answers

    In which year was the study on canal isthmuses in the mesial root of mandibular first molars in a Chinese population published?

    <p>2009</p> Signup and view all the answers

    Who is the editor of the book 'Essential clinical oral biology'?

    <p>Creanor S</p> Signup and view all the answers

    What is the name of the journal in which the study on the radix entomolaris and paramolaris was published?

    <p>Journal of Endodontics</p> Signup and view all the answers

    In which edition of Wheeler's Dental Anatomy, Physiology, & Occlusion is the topic of endodontics covered?

    <p>10th edition</p> Signup and view all the answers

    What is the title of the study published in the Development journal in 2017?

    <p>Cellular and molecular mechanisms of tooth root development</p> Signup and view all the answers

    Who are the authors of the study published in the Journal of Endodontics in 2014?

    <p>Souza-Flamini, L.E., Leoni, G.B., Chaves, J.F.M., Versiani, M.A., Cruz-Filho, A.M., Pécora, J.D. and Sousa-Neto, M.D.</p> Signup and view all the answers

    What is the main function of the pulp in terms of maintaining tooth health?

    <p>Maintaining health of dentine through nutrition</p> Signup and view all the answers

    What is the anatomical structure that marks the boundary between the crown and the root?

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

    What is the function of the CNC-derived mesenchyme in root formation?

    <p>Condensing around the HERS</p> Signup and view all the answers

    What is the term for the bilayer epithelial structure that guides root formation?

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

    What is the significance of understanding root morphology in permanent teeth?

    <p>It aids in dental restoration procedures</p> Signup and view all the answers

    What is the main role of odontoblasts in root development?

    <p>Secreting radicular dentine</p> Signup and view all the answers

    What determines the size, shape, and number of tooth roots?

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

    What is the purpose of the pulp in terms of sensory impulses?

    <p>Conducting sensory impulses</p> Signup and view all the answers

    What is the main difference in root morphology between primary and adult teeth?

    <p>Primary teeth have more elastic bone</p> Signup and view all the answers

    What is the term for an additional root on the mesio-palatal side of upper molars?

    <p>Radix Mesiolingualis</p> Signup and view all the answers

    Why do findings in literature often differ?

    <p>Due to differences in research techniques</p> Signup and view all the answers

    What is a characteristic of the roots of primary molars?

    <p>They are widely divergent and usually extend beyond the dimensions of the crown</p> Signup and view all the answers

    What is the characteristic of the roots of primary incisors and canines?

    <p>They are longer in proportion to their crown height than corresponding permanent teeth</p> Signup and view all the answers

    What is the morphological phenomenon of an additional disto-lingual root on lower molars?

    <p>Radix Entemolaris</p> Signup and view all the answers

    What is the characteristic of roots that are bifurcated or trifurcated?

    <p>They are morphological varieties</p> Signup and view all the answers

    What is the characteristic of adult teeth?

    <p>They have splayed roots</p> Signup and view all the answers

    What is the term for a tooth with an enlarged body and small roots?

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

    What is the term for the removal of infected or inflamed tissues inside the tooth?

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

    What is the term for an additional root on the disto-palatal side of upper molars?

    <p>Radix Distolingualis</p> Signup and view all the answers

    What is the title of the book published by John Wiley & Sons, Incorporated in 2016?

    <p>Essential Clinical Oral Biology</p> Signup and view all the answers

    What is the term for roots that are bifurcated or trifurcated?

    <p>Apically displayed root bifurcations</p> Signup and view all the answers

    What is the focus of the study published in the Journal of Endodontics in 2009?

    <p>Canal isthmuses in the mesial root of mandibular first molars</p> Signup and view all the answers

    What is the title of the journal in which the study on cellular and molecular mechanisms of tooth root development was published?

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

    What is the importance of knowing the morphology of roots?

    <p>For diagnosis and treatment planning</p> Signup and view all the answers

    What is the term for the removal of teeth from the existing dentition?

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

    Who is the author of the study published in the Journal of Endodontics in 2014?

    <p>Souza-Flamini, L.E.</p> Signup and view all the answers

    What is the term for roots that are bent or curved?

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

    What is the publication year of the book 'Pathways of the Pulp' by Cohen S, Hargreaves K, and Keiser K?

    <p>2006</p> Signup and view all the answers

    What is characteristic of the morphology of roots?

    <p>A variety of morphological appearances exist</p> Signup and view all the answers

    What is the focus of the study published in Endodontic Topics in 2010?

    <p>Primary human teeth and their root canal systems</p> Signup and view all the answers

    What is the title of the book published by Saunders in 2010?

    <p>Wheeler's Dental Anatomy, Physiology, &amp; Occlusion</p> Signup and view all the answers

    What is the focus of the study published in the Journal of Endodontics in 2014?

    <p>The radix entomolaris and paramolaris</p> Signup and view all the answers

    Who is the editor of the book 'Essential Clinical Oral Biology'?

    <p>Creanor, S.</p> Signup and view all the answers

    What is the publication year of the study published in the Development journal?

    <p>2017</p> Signup and view all the answers

    Study Notes

    Root Morphology of the Human Dentition

    Intended Learning Outcomes

    • Recall embedded knowledge of tooth structure
    • Recall embedded knowledge of the pulp and pulp physiology
    • Understand root morphology of primary and permanent teeth and its complexity

    The Pulp

    • Maintains health of dentine (nutrition)
    • Path for sensory impulses (sensory)
    • Initiates and governs dentine repair (formative)
    • Defence: triggers inflammatory and immune response
    • Protection: secondary and tertiary dentine

    Root Formation

    • Starts following crown formation
    • Enamel tissue reaches the future cementoenamel junction (anatomical boundary between the crown and the root)
    • HERS (bilayer epithelial structure) grows apically, guiding root formation and determining size, shape, and number of tooth roots
    • CNC-derived mesenchyme condenses around and interacts with the HERS
    • Mesenchyme of the apical papilla differentiates into odontoblasts with secretion of radicular (root-covering) dentine

    Root Morphology: Permanent Teeth

    • Maxillary teeth
    • Mandibular teeth
    • Third molars will not be discussed

    Root Morphology: Primary Teeth

    • The primary-permanent relationship
    • General differences between adult/permanent teeth anatomy
    • Splayed, thin roots
    • More elastic bone
    • Differences between roots
    • Roots tend to be shorter and more delicate than permanent teeth
    • Roots of primary incisors and canines are longer in proportion to their crown height than corresponding permanent teeth
    • Roots of primary molars are widely divergent and usually extend beyond the dimensions of the crown

    Morphological Varieties

    • Radix Entomolaris: additional disto-lingual root on lower molars
    • Radix Paramolaris: additional root on the mesio-buccal side of lower molars
    • Radix Mesiolingualis: additional root on mesio-palatal side of upper molars
    • Radix Distolingualis: additional root on disto-palatal side of upper molars
    • Taurodontism: body of the tooth is enlarged, but roots are small
    • Dilacerated roots: apically displayed root bifurcations or trifurcations

    Clinical Implications

    • Endodontics: removal of infected or inflamed tissues inside the tooth with specialized equipment and irrigation solutions
    • Exodontia: component of dentistry that involves the removal of teeth from the existing dentition

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    Related Documents

    USE Root Morphology - An Introduction - Dr Casper Jonker (2023-24).pdf.docx

    Description

    Test your knowledge of tooth structure, pulp physiology, and root morphology of primary and permanent teeth. Recall key concepts and understand the complexity of tooth development. Prepare to maintain dental health!

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