Anatomy of Maxillary Central Incisor
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Questions and Answers

What is the function of the diastema found in some persons?

Normal space between the two upper central incisors

How many surfaces do all teeth have?

  • 5 (correct)
  • 3
  • 6
  • 4

    • The lingual surfaces of most teeth are broader than the labial or buccal surfaces. (True/False)

    False

    What are the shapes of the labial and lingual surfaces of the crown of maxillary central incisors?

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

    The lingual surfaces converge to accommodate the larger arch size ______________ than lingually.

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

    Match the following terms with their definitions:

    <p>Cervical ridge = Elevations at the cervical third of the labial surface Mammelons = Elevations at the incisal third of newly erupted teeth Lingual fossa = Deep depression on the lingual surface of some teeth Root canal = The canal present in the root that houses the dental pulp</p> Signup and view all the answers

    What is the characteristic of the lingual fossa of the maxillary lateral incisor?

    <p>More concave than the maxillary central incisor</p> Signup and view all the answers

    What is the characteristic of the root length of the maxillary lateral incisor?

    <p>Longer than the maxillary central incisor</p> Signup and view all the answers

    What is the shape of the incisal outline of the maxillary lateral incisor?

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

    What is the location of the contact area on the distal surface of the maxillary lateral incisor?

    <p>Cervically located</p> Signup and view all the answers

    What is the characteristic of the pulp horns in the pulp chamber of the maxillary lateral incisor?

    <p>Rounded and less sharp</p> Signup and view all the answers

    What is the number of root canals in the maxillary lateral incisor?

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

    What is the location of the lingual pit in the maxillary lateral incisor?

    <p>Close to the cingulum</p> Signup and view all the answers

    What is the characteristic of the labial surface of the maxillary lateral incisor?

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

    What is the shape of the cingulum in the maxillary lateral incisor?

    <p>Well developed</p> Signup and view all the answers

    What is the characteristic of the incisal aspect of the maxillary lateral incisor compared to the maxillary central incisor?

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

    Study Notes

    Permanent Maxillary Central Incisor

    • Located first from the midline, with a normal space (diastema) between the two upper central incisors in some people
    • Broadest and longest of all incisors, and most prominent
    • Has 5 surfaces: labial, lingual, mesial, distal, and incisal

    Geometric Outline of the Crown

    • Labial and lingual surfaces have trapezoidal outline, with the smallest uneven side cervically and longest incisally
    • Mesial outline is slightly convex, while distal outline is more convex
    • Cervical outline is convex root-wise

    Surface Anatomy of the Crown

    • Labial surface:
      • Elevations: cervical ridge and mamelons in newly erupted teeth
      • Depressions: shallow 2 developmental grooves
    • Lingual surface:
      • Elevations: marginal ridges, cingulum, and incisal ridge
      • Depressions: lingual fossa
    • Proximal surfaces have triangular outline, with base cervically and apex incisally

    Root Anatomy

    • Cone-shaped with a blunt apex, centralized on the long axis of the tooth
    • Extraction should be done by rotation movement

    Maxillary Lateral Incisor

    • Smaller in all dimensions except root length, which is longer
    • May be cone-shaped (peg-shaped) due to absence of middle lobe
    • Incisal outline is rounded with rounded incisal angles
    • Single root with pointed apex curved distally

    Lingual Surface of Maxillary Lateral Incisor

    • Elevations: well-developed marginal ridges and cingulum
    • Depressions: lingual fossa, which is more concave than that in the maxillary central incisor
    • Note: a lingual pit (faulty pit) could be found near the cingulum, which is a point of decay

    Pulp Cavity

    • Formed of pulp chamber and root canal
    • Pulp chamber outline follows the outline of the crown, with pulp horns related to each mamelon in young teeth
    • Root canal is present in the root and follows its outline, ending in an apical foramen

    Permanent Maxillary Central Incisor

    • Located first from the midline, with a normal space (diastema) between the two upper central incisors in some people
    • Broadest and longest of all incisors, and most prominent
    • Has 5 surfaces: labial, lingual, mesial, distal, and incisal

    Geometric Outline of the Crown

    • Labial and lingual surfaces have trapezoidal outline, with the smallest uneven side cervically and longest incisally
    • Mesial outline is slightly convex, while distal outline is more convex
    • Cervical outline is convex root-wise

    Surface Anatomy of the Crown

    • Labial surface:
      • Elevations: cervical ridge and mamelons in newly erupted teeth
      • Depressions: shallow 2 developmental grooves
    • Lingual surface:
      • Elevations: marginal ridges, cingulum, and incisal ridge
      • Depressions: lingual fossa
    • Proximal surfaces have triangular outline, with base cervically and apex incisally

    Root Anatomy

    • Cone-shaped with a blunt apex, centralized on the long axis of the tooth
    • Extraction should be done by rotation movement

    Maxillary Lateral Incisor

    • Smaller in all dimensions except root length, which is longer
    • May be cone-shaped (peg-shaped) due to absence of middle lobe
    • Incisal outline is rounded with rounded incisal angles
    • Single root with pointed apex curved distally

    Lingual Surface of Maxillary Lateral Incisor

    • Elevations: well-developed marginal ridges and cingulum
    • Depressions: lingual fossa, which is more concave than that in the maxillary central incisor
    • Note: a lingual pit (faulty pit) could be found near the cingulum, which is a point of decay

    Pulp Cavity

    • Formed of pulp chamber and root canal
    • Pulp chamber outline follows the outline of the crown, with pulp horns related to each mamelon in young teeth
    • Root canal is present in the root and follows its outline, ending in an apical foramen

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    Description

    Learn about the characteristics and features of the maxillary central incisor, including its shape, size, and surfaces.

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