Primary Dentition Overview
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Primary Dentition Overview

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Questions and Answers

What notable feature is found on the mesio-buccal cusp of the lower first molar?

  • Tubercle of Zuckerkandl (correct)
  • Mesial fossa
  • Distal cusp
  • Disto-lingual cusp

    • Which two cusps are present linguistically on the lower first molar?

  • Mesio-lingual and disto-buccal
  • Disto-lingual and disto-buccal
  • Mesio-buccal and mesio-lingual
  • Mesio-lingual and disto-lingual (correct)

    • What is the orientation of the buccal cusps on the lower first molar?

  • They lean lingually (correct)
  • They lean toward the occlusal surface
  • They lean distally
  • They are vertically aligned

    • How many root canals does the lower first molar typically have?

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

    Which of the following is NOT a cusp on the buccal aspect of the lower second molar?

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

    What is the primary characteristic of the crown of upper central incisors (51;61) in comparison to their permanent counterparts?

    <p>Bulbous and rounded.</p> Signup and view all the answers

    At what stage of development does initial calcification of primary dentition begin?

    <p>3-4 months in utero.</p> Signup and view all the answers

    Which of the following is NOT a stage in the chronology of upper central incisor development?

    <p>Erupiton at 6 months.</p> Signup and view all the answers

    Which term best describes the primary goal of the learning outcomes regarding tooth morphology?

    <p>Revise terminology used in naming tooth landmarks.</p> Signup and view all the answers

    In the context of dental education, which aspect should be emphasized according to the diversity of anatomy across the patient population?

    <p>Recognition of anatomical variations in patients.</p> Signup and view all the answers

    What is a significant difference observed between primary and permanent teeth?

    <p>Primary teeth tend to have thinner enamel.</p> Signup and view all the answers

    Which of the following best describes the chronological order of primary tooth development stages?

    <p>Initial calcification, crown completion, eruption, root completion.</p> Signup and view all the answers

    What anatomical feature characterizes the labial view of primary upper central incisors?

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

    What anatomical feature distinguishes the upper canine's labial view?

    <p>Enamel ridge from cusp tip to cervical margin</p> Signup and view all the answers

    At what age does root completion of the upper canine typically occur?

    <p>Approx. 3 years</p> Signup and view all the answers

    How many pulp horns are found in the root canal of the upper lateral incisor?

    <p>Two pulp horns</p> Signup and view all the answers

    Which statement best describes the configuration of the crown of the upper canine when viewed mesially?

    <p>Bulky and rounded</p> Signup and view all the answers

    What is the characteristic feature of the cingulum on an upper canine?

    <p>Pronounced and prominent</p> Signup and view all the answers

    Which of the following features is NOT associated with the upper lateral incisor?

    <p>Bulky crown</p> Signup and view all the answers

    How many root canals are typically present in the upper canine?

    <p>One root canal</p> Signup and view all the answers

    In the context of the upper canine, what does the term 'mesial and distal fossae' refer to?

    <p>Depressions found on either side of the enamel ridge</p> Signup and view all the answers

    Which characteristic feature is shared by both the upper lateral incisor and the upper canine?

    <p>Single root with one canal</p> Signup and view all the answers

    What is a common misconception regarding the enamel ridge on the upper canine?

    <p>It runs from the cervical margin to the cusp tip</p> Signup and view all the answers

    When does initial calcification of the upper first molar occur?

    <p>5 months in utero</p> Signup and view all the answers

    Which of the following statements about the cusps of the upper first molar is true?

    <p>There are two buccal roots in the upper first molar.</p> Signup and view all the answers

    What is the function of the tubercle of Zuckerkandl?

    <p>It is a bulge of enamel over the mesio-buccal root.</p> Signup and view all the answers

    At what age does the crown of the upper first molar complete its development?

    <p>6 months</p> Signup and view all the answers

    How many pulp horns does the upper first molar typically have?

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

    Which root structure is characteristic of the upper first molar?

    <p>Single mesio-palatal root</p> Signup and view all the answers

    What age range is typical for the eruption of the upper first molar?

    <p>12-16 months</p> Signup and view all the answers

    Which cusps are present on the palatal aspect of the upper first molar?

    <p>One large mesio-palatal and one small disto-palatal</p> Signup and view all the answers

    What is the order of root completion for the upper first molar?

    <p>Roots complete at 2-2½ years</p> Signup and view all the answers

    The central developmental groove is most associated with which feature of the upper first molar?

    <p>The anatomy of the occlusal surface</p> Signup and view all the answers

    What is the chronology of root completion for the lower central incisor?

    <p>1½-2 years</p> Signup and view all the answers

    Which statement accurately describes the morphology of the lower lateral incisor?

    <p>Crown is fan-shaped with a long mesial side</p> Signup and view all the answers

    What unique feature distinguishes the lower canine from other teeth?

    <p>Crown is convex labially and concave lingually</p> Signup and view all the answers

    What is the mesial incisal angle characteristic of the lower central incisor?

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

    At what stage does the initial calcification of the lower lateral incisor occur?

    <p>4½ months in utero</p> Signup and view all the answers

    When does the crown completion of the lower first molar occur?

    <p>6 months</p> Signup and view all the answers

    Which characteristic can be observed from the lingual view of the lower canine?

    <p>Large pronounced cingulum</p> Signup and view all the answers

    What feature is present in both the lower central and lower lateral incisors?

    <p>Single root with one canal</p> Signup and view all the answers

    What does the cervical region of the lower lateral incisor exhibit?

    <p>Bulbous and undulated</p> Signup and view all the answers

    What is the general shape of the lower first molar's crown?

    <p>Complex with multiple acute angles</p> Signup and view all the answers

    Study Notes

    Primary Dentition

    • Upper Central Incisors (51;61)
      • Initial calcification: 3-4 months in utero
      • Crown completion: 4 months
      • Eruption: 7.5 months
      • Root completion: 1 ½ years
      • Square rather than rectangular
      • Shorter crown length and more bulbous rounded

    Upper Lateral Incisor

    • Laterally, the crown appears bulky
    • Cervical undulation present
    • Single root
    • One root canal, 2 pulp horns, mesially & distally

    Upper Canine (53;63)

    • Initial calcification: 5 months in utero
    • Crown completion: 9 months
    • Eruption: 16-20 months
    • Root completion: Approx. 3 years
    • Crown is almost symmetrical
    • Labially, an enamel ridge runs from crown 5p to cervical margin creating mesial & distal depressions (fossae) on either side of the ridge
    • Distal surface slightly more rounded
    • Mesial & distal marginal ridges
    • Pronounced cingulum
    • Bulky crown when viewed mesially or distally

    Upper First Molar (54;64)

    • Initial calcification: 5 months in utero
    • Crown completion: 6 months
    • Eruption: 12-16 months
    • Root completion: 2-2 ½ years
    • Buccally has 2 cusps: 1. Large mesio-buccal (mb) & 2. Small disto-buccal (db)
    • 2 buccal roots
    • Central developmental groove
    • 2 palatal cusps: 1. Large mesio-palatal (mp) & 2. Small disto-palatal (dp)
    • Single palatal root
    • Large bulge of enamel cervically over the mesio-buccal root called the tubercle of Zuckerkandl (Z)
    • 3 root canals and 4 pulp horns (one per cusp)

    Lower Central Incisor (71;81)

    • Initial calcification: 4 ½ months in utero
    • Crown completion: 4 months
    • Eruption: 6 ½ months
    • Root completion: 1 ½-2 years
    • Almost symmetrical when viewed labially
    • Sharp mesial incisal angle
    • Rounded distal incisal angle
    • Single root, one root canal
    • Mesial and distal pulp horns
    • Large cingulum lingually
    • Reduced mesial and distal marginal ridges

    Lower Lateral Incisor (72;82)

    • Initial calcification: 4 ½ months in utero
    • Crown completion: 4 ½ months
    • Eruption: 7 months
    • Root completion: 1 ½-2 years
    • Labially, the crown is fan-shaped with a long mesial side and a shorter distal side
    • Sharp mesio-incisal angle
    • Rounded disto-incisal angle
    • Large cingulum lingually
    • Mesial and distal marginal ridges
    • One root, similar to deciduous central incisor
    • One root canal and one mesial and one distal pulp horn
    • Wedge-shaped and bulbous around cervical region when viewed mesially or distally

    Lower Canine (73;83)

    • Initial calcification: 5 months in utero
    • Crown completion: 9 months
    • Eruption: 16-20 months
    • Root completion: 2 ½ -3 years
    • Labially, the crown is convex
    • Mesial is shorter than the distal incisal slope
    • One root, roughly triangular in cross-section which curves distally and labially
    • One root canal and no pulp horns
    • Lingually, the crown is concave
    • Mesial and distal marginal ridges
    • Ridge of enamel from 5p of cusp to the cingulum producing a mesial and distal fossa
    • Distal surface more rounded
    • Cervical undulation on mesial and distal surfaces

    Lower First Molar (74;84)

    • Initial calcification: 5 months in utero
    • Crown completion: 6 months
    • Eruption: 12-16 months
    • Root completion: 2-2 ½ years
    • From buccal aspect: two cusps, mesio-buccal and disto-buccal
    • Protuberance of enamel known as the tubercle of Zuckerkandl on mesio-buccal cusp in cervical region
    • Lingually: two cusps: 1. Large mesio-lingual & 2. small disto-lingual
    • Ridge of enamel joins mesio-lingual and mesio-buccal cusps, forming a small mesial and large distal fossa
    • Buccal cusps lean lingually
    • Two divergent roots, one mesial and one distal
    • Two root canals and three pulp horns, one lingual, one mesio-buccal and one disto-buccal

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    Primary Dentition Part 2 GN PDF

    Description

    This quiz covers the key aspects of primary dentition, focusing on the characteristics, calcification, eruption, and root completion of upper teeth, including incisors, canines, and molars. Test your knowledge on the development and anatomy of these primary teeth.

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