Dental Development and Eruption Quiz
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Questions and Answers

At what age do the primary mandibular canines usually exfoliate?

  • 10-11 years
  • 12-13 years
  • 6-7 years (correct)
  • 8-9 years
  • The ridge found on the linguo-cervical third of anterior teeth is called the:

  • Oblique ridge
  • Lingual ridge (correct)
  • Cingulum
  • Marginal ridge
  • What cell type is responsible for forming dentin?

  • Osteoclast
  • Odontoblast (correct)
  • Ameloblast
  • Cementoblast
  • Osteoblast
  • Which premolar is most likely to have a single pulp horn?

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

    Which one of the following is not a normal anatomical feature of mandibular incisors?

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

    The heights of contour of the distal surfaces of permanent mandibular central incisors are located in which coronal third?

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

    Which proximal surface is farther away from the midline compared to another?

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

    The transition area of a tooth where one surface ends and another surface begins is called what?

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

    What is the characteristic of the central developmental groove of maxillary 2nd premolar compared to maxillary 1st premolar?

    <p>Shorter with less supplemental grooves (C)</p> Signup and view all the answers

    How many root canals does the lower 1st premolar usually have?

    <p>Two canals (A)</p> Signup and view all the answers

    Which option correctly identifies the maxillary left lateral incisor in the two-digit system?

    <p>53 (C)</p> Signup and view all the answers

    Which term describes the part of the tooth that is visible in the oral cavity?

    <p>Clinical crown (A)</p> Signup and view all the answers

    Which part of the tooth is considered the hardest?

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

    What is identified by the number 16 in the two-digit system?

    <p>Maxillary right 1st molar (C)</p> Signup and view all the answers

    What term describes the emergence of teeth into the oral cavity?

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

    According to the American numbering system, what is the number for the permanent maxillary left second premolar?

    <p>25 (B)</p> Signup and view all the answers

    How long does the shedding of primary teeth usually take?

    <p>4 years (C)</p> Signup and view all the answers

    What is the correct number of point angles in an anterior tooth?

    <p>8 (B)</p> Signup and view all the answers

    What does the term 'dentition' encompass?

    <p>The presence of both deciduous and permanent teeth (A)</p> Signup and view all the answers

    What is usually found in the depths of developmental grooves?

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

    Which structure covers the surface of the tooth root?

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

    At what age does mixed dentition typically begin?

    <p>6 years (D)</p> Signup and view all the answers

    At what age does the root completion of deciduous teeth typically occur after eruption?

    <p>3 years (D)</p> Signup and view all the answers

    Which feature describes the symmetry of the permanent mandibular central incisor compared to the mandibular lateral incisor?

    <p>Mandibular central incisor is symmetrical (C)</p> Signup and view all the answers

    What is the approximate age at which the permanent 2nd molars erupt into the oral cavity?

    <p>11-13 years (A)</p> Signup and view all the answers

    In the two-digit numbering system, what does the code '11' represent?

    <p>Maxillary right central incisor (C)</p> Signup and view all the answers

    Which of the following are characteristics used to compare upper central and upper lateral incisors?

    <p>Mesio-incisal angle and lingual pit (C)</p> Signup and view all the answers

    How many teeth are generally visible in the oral cavity at 21 years of age?

    <p>28 (A)</p> Signup and view all the answers

    What are the typical features used to distinguish upper premolars from lower premolars?

    <p>Cusp number and dimension (C)</p> Signup and view all the answers

    Which landmark is NOT typically found on the lingual aspect of newly erupted permanent central incisors?

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

    Which feature is generally NOT associated with upper canines in comparison to lower canines?

    <p>Distal cusp angle (A)</p> Signup and view all the answers

    What structural feature differentiates the landmarks found on the occlusal aspect of the upper first premolar?

    <p>Presence of a central fossa (A)</p> Signup and view all the answers

    What is the crown shape of the labial aspect of the maxillary lateral incisor?

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

    What features are present on freshly erupted, unworn central incisors?

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

    In the mandibular central incisor, how do the mesial and distal marginal ridges compare?

    <p>Mesial marginal ridge is shorter (C)</p> Signup and view all the answers

    Where is the mesial contact area of the maxillary lateral incisor located?

    <p>At junction of incisal and middle third (A)</p> Signup and view all the answers

    What is the angle of the cusp of the maxillary canine?

    <p>125° (A)</p> Signup and view all the answers

    In which tooth does the mesial cusp slope of the buccal cusp appear straight and longer than the distal slope?

    <p>Maxillary 1st premolar (A)</p> Signup and view all the answers

    Which teeth have the largest occlusal surfaces?

    <p>Maxillary molars (A)</p> Signup and view all the answers

    In which type of tooth is the mesial cusp slope longer than the distal one?

    <p>Maxillary permanent canine (A)</p> Signup and view all the answers

    Which statement accurately describes the relationship between the cusps of the maxillary 1st premolar?

    <p>The buccal cusp is about 1 mm longer than the lingual cusp (C)</p> Signup and view all the answers

    What is the correct order of cusp size for the mandibular 2nd premolar from largest to smallest?

    <p>Buccal cusp - Mesiolingual cusp - Distolingual cusp (A)</p> Signup and view all the answers

    Which permanent tooth is considered the 'cornerstone' of the dental arch?

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

    What shape represents the facial aspect of all teeth?

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

    Mesiolingual grooves are most commonly found on which permanent teeth?

    <p>Maxillary first molars (A)</p> Signup and view all the answers

    Root bifurcation is more likely to be found in which of the following permanent anterior teeth?

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

    In terms of mesiodistal and faciolingual measurements, which permanent anterior crown exhibits greater mesiodistal measurement?

    <p>Maxillary central incisor (D)</p> Signup and view all the answers

    Which teeth are most likely to be congenitally missing?

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

    Flashcards

    Two Digit Tooth Numbering System

    A system of tooth numbering where the first digit represents the quadrant and the second digit represents the tooth position.

    Mesial Surface

    The surface of a tooth that faces towards the midline of the dental arch.

    Buccal Surface

    The surface of a tooth that faces towards the cheek or lip.

    Lingual Surface

    The surface of a tooth that faces towards the tongue.

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    Tooth Eruption

    The process by which a tooth emerges from the gum and into the oral cavity.

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    Tooth Development

    The process of tooth development from its initial formation to its final shape.

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    Enamel

    The hard, outermost layer of a tooth, covering the crown.

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    Dentin

    The layer of tissue that forms the bulk of a tooth, located beneath the enamel.

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    Maxillary 2nd Premolar Groove

    The central developmental groove of the maxillary second premolar is longer and has more supplemental grooves compared to the maxillary first premolar.

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    Lower 1st Premolar Root Canals

    The lower first premolar typically has two root canals.

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    Clinical Crown

    The visible part of the tooth above the gum line is called the clinical crown.

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    Hardest tooth part

    The hardest part of the tooth is the enamel, which is the outer layer covering the crown.

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    Socket

    A socket is the bony cavity in the jawbone that houses the root of a tooth.

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    Developmental Groove

    A developmental groove is a linear depression on the tooth surface formed during tooth development.

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    Cusp

    A cusp is a pointed or rounded elevation on the chewing surface of a tooth.

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    American Numbering System - 25

    The American numbering system assigns the number 25 to the permanent maxillary left second premolar.

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    Maxillary Lateral Incisor Crown Shape

    The labial surface of the maxillary lateral incisor has a crown shape resembling a trapezoid.

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    Mamelons on Central Incisors

    Freshly erupted, unworn central incisors exhibit three prominent bulges on their incisal edge called mamelons.

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    Mandibular Central Incisor Marginal Ridges

    The mesial marginal ridge of the mandibular central incisor is longer than the distal marginal ridge.

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    Maxillary Lateral Incisor Incisal Ridge Alignment

    The incisal ridge of the maxillary lateral incisor is positioned slightly lingual to the long axis of the tooth.

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    Maxillary Lateral Incisor Mesial Contact Area

    The mesial contact area of the maxillary lateral incisor is located at the junction of the incisal and middle thirds of the tooth.

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    Maxillary Canine Cusp Angle

    The cusp angle (angle formed by the cusp tip and the two slopes) of the maxillary canine is approximately 110 degrees.

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    Maxillary Incisor Incisal Edge Slope

    Due to wear and tear (attrition), the incisal edge of maxillary incisors tends to slope lingually.

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    Maxillary First Premolar Mesial Slope

    The maxillary first premolar exhibits a mesial slope of the buccal cusp that is straight and longer than the distal slope.

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    Line Angle

    The transition area of a tooth where one surface ends and another surface begins.

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    What cells form dentin?

    The odontoblasts are the cells that form dentin.

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    Which premolar has a single pulp horn?

    The maxillary first premolar is most likely to have a single pulp horn.

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    When do mandibular canines exfoliate?

    The primary mandibular canines typically exfoliate between the ages of 6 and 7.

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    What is the ridge on the linguo-cervical third of anterior teeth?

    The lingual ridge is the ridge located on the linguo-cervical third of anterior teeth.

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    Where is the height of contour of the distal surface of mandibular central incisors?

    The heights of contour of the distal surfaces of permanent mandibular central incisors are located in the middle third of the tooth.

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    Why is "premolar" more accurate than "bicuspid"?

    The term "premolar" is more accurate than "bicuspid" because premolars can have one, two, or even three cusps.

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    What is the FDI number of the mandibular left second molar?

    The mandibular left second molar (permanent) has the FDI number 37.

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    Maxillary 1st Premolar Cusp Length

    The buccal cusp is slightly longer than the lingual cusp in the maxillary first premolar.

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    Mandibular 2nd Premolar Cusp Order

    The mandibular second premolar typically has three cusps: a buccal cusp and two lingual cusps (mesiolingual and distolingual). The buccal cusp is the largest, followed by the distolingual, and then the mesiolingual.

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    Dental Arch Cornerstone

    The maxillary canine is considered the 'cornerstone' because of its strong position and role in guiding the occlusion and maintaining arch integrity.

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    Tooth Facial Aspect Shape

    The facial aspect (front portion) of a tooth generally resembles a trapezoid shape.

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    Mesiolingual Groove Location

    Mesiolingual grooves can be found on mandibular second premolars. These grooves are on the lingual surface, towards the front of the tooth.

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    Root Bifurcation in Anterior Teeth

    Root bifurcation, where a single root splits into two, is more common in maxillary canines. This helps them withstand forces from chewing.

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    Maxillary Central Incisor Crown Shape

    Maxillary central incisors, when viewed from the biting surface, show a greater mesiodistal measurement (width) than faciolingual measurement (thickness).

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    Most Common Missing Teeth

    Third molars (wisdom teeth) are the most common teeth to be missing congenitally, meaning they never develop.

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    What are Mamelons?

    Mamelons are the three rounded projections on the incisal edge of newly erupted incisors. They fade as the tooth wears down.

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    What is a Tubercle?

    A tubercle is a small, rounded protuberance on a tooth, like a mini-bump. It's common on molars, premolars, and sometimes incisors.

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    What makes up the microanatomy of a tooth?

    The microanatomy of a tooth refers to its internal structure. It includes the enamel, dentin, pulp, cementum, and periodontal ligament.

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    Describe the occlusal features of an upper first premolar.

    The occlusal aspect of the upper first premolar includes features like cusps, grooves, fossae, and marginal ridges. It's the chewing surface of the tooth.

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    What is a Periodontium?

    The Periodontium is the support structure of a tooth. It consists of the gingiva (gums), cementum, periodontal ligament, and alveolar bone.

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    What are the lingual features of a permanent central incisor?

    The lingual aspect of a permanent central incisor has features like the lingual fossa, lingual groove, cingulum, and marginal ridges. This is the inner, tongue-facing side of the tooth.

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    What is the Federation Dentaire Internationale (FDI) System?

    The FDI system is a method of tooth numbering that uses two digits. The first digit indicates the quadrant (mouth region), and the second digit indicates the tooth within that quadrant.

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    What are the lingual characteristics of a permanent maxillary canine?

    The lingual aspect of a permanent maxillary canine has features like the cingulum, marginal ridges, and lingual fossa. This is the inner, tongue-facing side of the canine.

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    Study Notes

    Dental Development and Eruption

    • Permanent maxillary first molar root completion occurs at 9-10 years old.
    • Mandibular canines erupt simultaneously with premolars.
    • Maxillary first incisors erupt before any deciduous teeth are lost.
    • Permanent tooth eruption begins when half of the root is formed.
    • Complete deciduous dentition eruption occurs between 2.5-6.5 years.
    • Maxillary second premolars have three cusps.

    Dental Terminology

    • Socket: The bony cavity that holds a tooth.
    • Developmental Groove: An anatomical groove involved in tooth development.
    • Cusp: A prominent, rounded projection on the chewing surface of a tooth.
    • Mamelons: Small rounded projections on the incisal edges of newly erupted incisors.
    • Tubercle: Small, rounded eminence on the surface of certain teeth.

    Tooth Anatomy

    • Primary maxillary molars generally possess two roots.
    • Maxillary premolars usually have two roots.
    • Maxillary first premolars have mesial and distal cusps of equal length.
    • There are 4 line angles in mandibular first molars.
    • Maxillary canines often have one fossa on the lingual surface
    • The cervix is the transition area between the crown and root.
    • Children usually have 20 primary teeth at 7 years old.
    • Permanent teeth are classified as succedaneous or non-succedaneous.
    • Deciduous teeth are replaced by permanent teeth.
    • By 21 years, individuals are often expected to have 32 permanent teeth.

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    Sample Test Dentition 1 PDF

    Description

    Test your knowledge on the development and eruption of teeth, including key stages and terminology. Explore the anatomy of primary and permanent teeth, along with their features and eruption timelines. This quiz is essential for dental students and professionals alike.

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