Maxillary and Mandibular Permanent Canine Overview

Learning Objectives

  • Demonstrate understanding of terminology for Maxillary Permanent Canine surfaces.
  • Identify and describe surfaces of Maxillary vs Mandibular Permanent Canine.
  • Know eruption sequence and dates for both types of canines.

Surface Description Framework

  1. Function: Mastication, esthetics, speech.
  2. Eruption Date: Maxillary (11-12 years), Mandibular (9-10 years).
  3. Number of Lobes: 4 lobes (3 labial, 1 lingual).
  4. Geometric Outline of Crown: Trapezoidal.
  5. Crown Outlines: Descriptive features of crown shape.
  6. Surface Anatomy: Elevations and depressions on crown surfaces.
  7. Root/S: Single root with curvature.
  8. Pulp Cavity: Structure and characteristics.

Maxillary Permanent Canine Surfaces

  • Five Aspects:
    • Labial
    • Lingual
    • Mesial
    • Distal
    • Incisal
Labial Surface
  • Geometric Outline: Trapezoid; features include:
    • Mesial Outline: Convex to contact area.
    • Distal Outline: Concave to contact area.
    • Cervical Outline: Convex towards root.
  • Elevations: Cervical and labial ridges.
  • Depressions: Shallow longitudinal depressions.
Lingual Surface
  • Outline: Similar trapezoidal shape as labial.
  • Elevations: Marginal ridges, cingulum, and prominent lingual ridge.
Mesial and Distal Surfaces
  • Mesial Surface: Triangular, wider near the base.
  • Distal Surface: Generally narrower than mesial, with differences in curvature and contact areas.
Incisal Surface
  • Shape: Diamond; features include:
    • Cusp tip shifted labially and mesially.
    • Outline contains combined features of labial and lingual.

Root Characteristics

  • Number: Single, the longest in oral cavity.
  • Curvature: Typically curved distally.

Differences Between Maxillary and Mandibular Canines

  1. Crown Size: Mandibular is longer and narrower.
  2. Position of Contact Areas: More incisally on Mandibular.
  3. Root Length: Mandibular generally has a shorter root.
  4. Lingual Characteristics: Limited elevation and fossa on Mandibular.
  5. Cusp Tip: Less pointed on Mandibular, lingual inclination.
  6. Root Structure: Can have bifurcated roots in Mandibular.

Pulp Cavity Structure

  • Pulp Chamber: Follows crown outline, with pulp horns in young teeth.
  • Root Canal: Typically one canal, but can occasionally have more.